1325 lines
41 KiB
TypeScript
1325 lines
41 KiB
TypeScript
/**
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* Copyright 2019 Google Inc. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { Protocol } from 'devtools-protocol';
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import { assert } from './assert.js';
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import { CDPSession } from './Connection.js';
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import {
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EvaluateFn,
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EvaluateFnReturnType,
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EvaluateHandleFn,
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SerializableOrJSHandle,
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UnwrapPromiseLike,
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WrapElementHandle,
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} from './EvalTypes.js';
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import { ExecutionContext } from './ExecutionContext.js';
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import { Frame, FrameManager } from './FrameManager.js';
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import { debugError, helper } from './helper.js';
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import { MouseButton } from './Input.js';
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import { Page, ScreenshotOptions } from './Page.js';
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import { getQueryHandlerAndSelector } from './QueryHandler.js';
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import { KeyInput } from './USKeyboardLayout.js';
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/**
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* @public
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*/
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export interface BoxModel {
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content: Point[];
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padding: Point[];
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border: Point[];
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margin: Point[];
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width: number;
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height: number;
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}
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/**
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* @public
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*/
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export interface BoundingBox extends Point {
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/**
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* the width of the element in pixels.
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*/
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width: number;
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/**
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* the height of the element in pixels.
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*/
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height: number;
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}
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/**
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* @internal
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*/
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export function createJSHandle(
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context: ExecutionContext,
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remoteObject: Protocol.Runtime.RemoteObject
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): JSHandle {
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const frame = context.frame();
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if (remoteObject.subtype === 'node' && frame) {
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const frameManager = frame._frameManager;
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return new ElementHandle(
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context,
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context._client,
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remoteObject,
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frame,
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frameManager.page(),
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frameManager
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);
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}
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return new JSHandle(context, context._client, remoteObject);
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}
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const applyOffsetsToQuad = (quad: Point[], offsetX: number, offsetY: number) =>
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quad.map((part) => ({ x: part.x + offsetX, y: part.y + offsetY }));
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/**
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* Represents an in-page JavaScript object. JSHandles can be created with the
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* {@link Page.evaluateHandle | page.evaluateHandle} method.
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*
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* @example
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* ```js
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* const windowHandle = await page.evaluateHandle(() => window);
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* ```
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*
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* JSHandle prevents the referenced JavaScript object from being garbage-collected
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* unless the handle is {@link JSHandle.dispose | disposed}. JSHandles are auto-
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* disposed when their origin frame gets navigated or the parent context gets destroyed.
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*
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* JSHandle instances can be used as arguments for {@link Page.$eval},
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* {@link Page.evaluate}, and {@link Page.evaluateHandle}.
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*
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* @public
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*/
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export class JSHandle<HandleObjectType = unknown> {
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/**
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* @internal
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*/
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_context: ExecutionContext;
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/**
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* @internal
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*/
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_client: CDPSession;
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/**
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* @internal
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*/
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_remoteObject: Protocol.Runtime.RemoteObject;
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/**
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* @internal
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*/
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_disposed = false;
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/**
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* @internal
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*/
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constructor(
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context: ExecutionContext,
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client: CDPSession,
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remoteObject: Protocol.Runtime.RemoteObject
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) {
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this._context = context;
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this._client = client;
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this._remoteObject = remoteObject;
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}
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/** Returns the execution context the handle belongs to.
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*/
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executionContext(): ExecutionContext {
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return this._context;
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}
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/**
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* This method passes this handle as the first argument to `pageFunction`.
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* If `pageFunction` returns a Promise, then `handle.evaluate` would wait
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* for the promise to resolve and return its value.
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*
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* @example
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* ```js
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* const tweetHandle = await page.$('.tweet .retweets');
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* expect(await tweetHandle.evaluate(node => node.innerText)).toBe('10');
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* ```
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*/
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async evaluate<T extends EvaluateFn<HandleObjectType>>(
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pageFunction: T | string,
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...args: SerializableOrJSHandle[]
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): Promise<UnwrapPromiseLike<EvaluateFnReturnType<T>>> {
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return await this.executionContext().evaluate<
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UnwrapPromiseLike<EvaluateFnReturnType<T>>
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>(pageFunction, this, ...args);
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}
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/**
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* This method passes this handle as the first argument to `pageFunction`.
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*
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* @remarks
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*
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* The only difference between `jsHandle.evaluate` and
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* `jsHandle.evaluateHandle` is that `jsHandle.evaluateHandle`
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* returns an in-page object (JSHandle).
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*
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* If the function passed to `jsHandle.evaluateHandle` returns a Promise,
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* then `evaluateHandle.evaluateHandle` waits for the promise to resolve and
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* returns its value.
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*
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* See {@link Page.evaluateHandle} for more details.
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*/
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async evaluateHandle<HandleType extends JSHandle = JSHandle>(
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pageFunction: EvaluateHandleFn,
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...args: SerializableOrJSHandle[]
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): Promise<HandleType> {
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return await this.executionContext().evaluateHandle(
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pageFunction,
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this,
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...args
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);
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}
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/** Fetches a single property from the referenced object.
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*/
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async getProperty(propertyName: string): Promise<JSHandle> {
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const objectHandle = await this.evaluateHandle(
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(object: Element, propertyName: keyof Element) => {
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const result: Record<string, unknown> = { __proto__: null };
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result[propertyName] = object[propertyName];
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return result;
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},
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propertyName
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);
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const properties = await objectHandle.getProperties();
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const result = properties.get(propertyName);
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assert(result instanceof JSHandle);
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await objectHandle.dispose();
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return result;
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}
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/**
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* The method returns a map with property names as keys and JSHandle
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* instances for the property values.
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*
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* @example
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* ```js
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* const listHandle = await page.evaluateHandle(() => document.body.children);
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* const properties = await listHandle.getProperties();
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* const children = [];
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* for (const property of properties.values()) {
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* const element = property.asElement();
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* if (element)
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* children.push(element);
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* }
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* children; // holds elementHandles to all children of document.body
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* ```
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*/
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async getProperties(): Promise<Map<string, JSHandle>> {
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assert(this._remoteObject.objectId);
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const response = await this._client.send('Runtime.getProperties', {
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objectId: this._remoteObject.objectId,
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ownProperties: true,
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});
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const result = new Map<string, JSHandle>();
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for (const property of response.result) {
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if (!property.enumerable || !property.value) continue;
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result.set(property.name, createJSHandle(this._context, property.value));
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}
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return result;
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}
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/**
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* @returns Returns a JSON representation of the object.If the object has a
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* `toJSON` function, it will not be called.
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* @remarks
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*
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* The JSON is generated by running {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify | JSON.stringify}
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* on the object in page and consequent {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse | JSON.parse} in puppeteer.
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* **NOTE** The method throws if the referenced object is not stringifiable.
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*/
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async jsonValue<T = unknown>(): Promise<T> {
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if (this._remoteObject.objectId) {
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const response = await this._client.send('Runtime.callFunctionOn', {
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functionDeclaration: 'function() { return this; }',
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objectId: this._remoteObject.objectId,
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returnByValue: true,
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awaitPromise: true,
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});
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return helper.valueFromRemoteObject(response.result) as T;
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}
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return helper.valueFromRemoteObject(this._remoteObject) as T;
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}
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/**
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* @returns Either `null` or the object handle itself, if the object
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* handle is an instance of {@link ElementHandle}.
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*/
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asElement(): ElementHandle | null {
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/* This always returns null, but subclasses can override this and return an
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ElementHandle.
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*/
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return null;
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}
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/**
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* Stops referencing the element handle, and resolves when the object handle is
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* successfully disposed of.
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*/
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async dispose(): Promise<void> {
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if (this._disposed) return;
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this._disposed = true;
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await helper.releaseObject(this._client, this._remoteObject);
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}
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/**
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* Returns a string representation of the JSHandle.
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*
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* @remarks Useful during debugging.
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*/
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toString(): string {
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if (this._remoteObject.objectId) {
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const type = this._remoteObject.subtype || this._remoteObject.type;
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return 'JSHandle@' + type;
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}
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return 'JSHandle:' + helper.valueFromRemoteObject(this._remoteObject);
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}
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}
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/**
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* ElementHandle represents an in-page DOM element.
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*
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* @remarks
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*
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* ElementHandles can be created with the {@link Page.$} method.
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*
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* ```js
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* const puppeteer = require('puppeteer');
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*
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* (async () => {
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* const browser = await puppeteer.launch();
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* const page = await browser.newPage();
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* await page.goto('https://example.com');
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* const hrefElement = await page.$('a');
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* await hrefElement.click();
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* // ...
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* })();
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* ```
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*
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* ElementHandle prevents the DOM element from being garbage-collected unless the
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* handle is {@link JSHandle.dispose | disposed}. ElementHandles are auto-disposed
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* when their origin frame gets navigated.
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*
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* ElementHandle instances can be used as arguments in {@link Page.$eval} and
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* {@link Page.evaluate} methods.
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*
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* If you're using TypeScript, ElementHandle takes a generic argument that
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* denotes the type of element the handle is holding within. For example, if you
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* have a handle to a `<select>` element, you can type it as
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* `ElementHandle<HTMLSelectElement>` and you get some nicer type checks.
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*
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* @public
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*/
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export class ElementHandle<
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ElementType extends Element = Element
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> extends JSHandle<ElementType> {
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private _frame: Frame;
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private _page: Page;
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private _frameManager: FrameManager;
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/**
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* @internal
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*/
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constructor(
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context: ExecutionContext,
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client: CDPSession,
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remoteObject: Protocol.Runtime.RemoteObject,
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frame: Frame,
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page: Page,
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frameManager: FrameManager
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) {
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super(context, client, remoteObject);
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this._client = client;
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this._remoteObject = remoteObject;
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this._frame = frame;
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this._page = page;
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this._frameManager = frameManager;
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}
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/**
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* Wait for the `selector` to appear within the element. If at the moment of calling the
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* method the `selector` already exists, the method will return immediately. If
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* the `selector` doesn't appear after the `timeout` milliseconds of waiting, the
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* function will throw.
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*
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* This method does not work across navigations or if the element is detached from DOM.
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*
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* @param selector - A
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* {@link https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors | selector}
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* of an element to wait for
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* @param options - Optional waiting parameters
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* @returns Promise which resolves when element specified by selector string
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* is added to DOM. Resolves to `null` if waiting for hidden: `true` and
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* selector is not found in DOM.
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* @remarks
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* The optional parameters in `options` are:
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*
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* - `visible`: wait for the selected element to be present in DOM and to be
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* visible, i.e. to not have `display: none` or `visibility: hidden` CSS
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* properties. Defaults to `false`.
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*
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* - `hidden`: wait for the selected element to not be found in the DOM or to be hidden,
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* i.e. have `display: none` or `visibility: hidden` CSS properties. Defaults to
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* `false`.
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*
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* - `timeout`: maximum time to wait in milliseconds. Defaults to `30000`
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* (30 seconds). Pass `0` to disable timeout. The default value can be changed
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* by using the {@link Page.setDefaultTimeout} method.
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*/
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async waitForSelector(
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selector: string,
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options: {
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visible?: boolean;
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hidden?: boolean;
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timeout?: number;
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} = {}
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): Promise<ElementHandle | null> {
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const frame = this._context.frame();
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assert(frame);
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const secondaryContext = await frame._secondaryWorld.executionContext();
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const adoptedRoot = await secondaryContext._adoptElementHandle(this);
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const handle = await frame._secondaryWorld.waitForSelector(selector, {
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...options,
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root: adoptedRoot,
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});
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await adoptedRoot.dispose();
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if (!handle) return null;
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const mainExecutionContext = await frame._mainWorld.executionContext();
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const result = await mainExecutionContext._adoptElementHandle(handle);
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await handle.dispose();
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return result;
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}
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/**
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* Wait for the `xpath` within the element. If at the moment of calling the
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* method the `xpath` already exists, the method will return immediately. If
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* the `xpath` doesn't appear after the `timeout` milliseconds of waiting, the
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* function will throw.
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*
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* If `xpath` starts with `//` instead of `.//`, the dot will be appended automatically.
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*
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* This method works across navigation
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* ```js
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* const puppeteer = require('puppeteer');
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* (async () => {
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* const browser = await puppeteer.launch();
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* const page = await browser.newPage();
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* let currentURL;
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* page
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* .waitForXPath('//img')
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* .then(() => console.log('First URL with image: ' + currentURL));
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* for (currentURL of [
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* 'https://example.com',
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* 'https://google.com',
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* 'https://bbc.com',
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* ]) {
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* await page.goto(currentURL);
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* }
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* await browser.close();
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* })();
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* ```
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* @param xpath - A
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* {@link https://developer.mozilla.org/en-US/docs/Web/XPath | xpath} of an
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* element to wait for
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* @param options - Optional waiting parameters
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* @returns Promise which resolves when element specified by xpath string is
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* added to DOM. Resolves to `null` if waiting for `hidden: true` and xpath is
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* not found in DOM.
|
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* @remarks
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* The optional Argument `options` have properties:
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*
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* - `visible`: A boolean to wait for element to be present in DOM and to be
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* visible, i.e. to not have `display: none` or `visibility: hidden` CSS
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* properties. Defaults to `false`.
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*
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* - `hidden`: A boolean wait for element to not be found in the DOM or to be
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* hidden, i.e. have `display: none` or `visibility: hidden` CSS properties.
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* Defaults to `false`.
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*
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* - `timeout`: A number which is maximum time to wait for in milliseconds.
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* Defaults to `30000` (30 seconds). Pass `0` to disable timeout. The default
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* value can be changed by using the {@link Page.setDefaultTimeout} method.
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*/
|
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async waitForXPath(
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xpath: string,
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options: {
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visible?: boolean;
|
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hidden?: boolean;
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timeout?: number;
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} = {}
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): Promise<ElementHandle | null> {
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const frame = this._context.frame();
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assert(frame);
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const secondaryContext = await frame._secondaryWorld.executionContext();
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const adoptedRoot = await secondaryContext._adoptElementHandle(this);
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xpath = xpath.startsWith('//') ? '.' + xpath : xpath;
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if (!xpath.startsWith('.//')) {
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await adoptedRoot.dispose();
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throw new Error('Unsupported xpath expression: ' + xpath);
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}
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const handle = await frame._secondaryWorld.waitForXPath(xpath, {
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...options,
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root: adoptedRoot,
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});
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await adoptedRoot.dispose();
|
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if (!handle) return null;
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const mainExecutionContext = await frame._mainWorld.executionContext();
|
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const result = await mainExecutionContext._adoptElementHandle(handle);
|
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await handle.dispose();
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return result;
|
|
}
|
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|
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override asElement(): ElementHandle<ElementType> | null {
|
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return this;
|
|
}
|
|
|
|
/**
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|
* Resolves to the content frame for element handles referencing
|
|
* iframe nodes, or null otherwise
|
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*/
|
|
async contentFrame(): Promise<Frame | null> {
|
|
const nodeInfo = await this._client.send('DOM.describeNode', {
|
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objectId: this._remoteObject.objectId,
|
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});
|
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if (typeof nodeInfo.node.frameId !== 'string') return null;
|
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return this._frameManager.frame(nodeInfo.node.frameId);
|
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}
|
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|
|
private async _scrollIntoViewIfNeeded(): Promise<void> {
|
|
const error = await this.evaluate(
|
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async (
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element: Element,
|
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pageJavascriptEnabled: boolean
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): Promise<string | false> => {
|
|
if (!element.isConnected) return 'Node is detached from document';
|
|
if (element.nodeType !== Node.ELEMENT_NODE)
|
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return 'Node is not of type HTMLElement';
|
|
// force-scroll if page's javascript is disabled.
|
|
if (!pageJavascriptEnabled) {
|
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element.scrollIntoView({
|
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block: 'center',
|
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inline: 'center',
|
|
// @ts-expect-error Chrome still supports behavior: instant but
|
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// it's not in the spec so TS shouts We don't want to make this
|
|
// breaking change in Puppeteer yet so we'll ignore the line.
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|
behavior: 'instant',
|
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});
|
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return false;
|
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}
|
|
const visibleRatio = await new Promise((resolve) => {
|
|
const observer = new IntersectionObserver((entries) => {
|
|
resolve(entries[0]!.intersectionRatio);
|
|
observer.disconnect();
|
|
});
|
|
observer.observe(element);
|
|
});
|
|
if (visibleRatio !== 1.0) {
|
|
element.scrollIntoView({
|
|
block: 'center',
|
|
inline: 'center',
|
|
// @ts-expect-error Chrome still supports behavior: instant but
|
|
// it's not in the spec so TS shouts We don't want to make this
|
|
// breaking change in Puppeteer yet so we'll ignore the line.
|
|
behavior: 'instant',
|
|
});
|
|
}
|
|
return false;
|
|
},
|
|
this._page.isJavaScriptEnabled()
|
|
);
|
|
|
|
if (error) throw new Error(error);
|
|
}
|
|
|
|
private async _getOOPIFOffsets(
|
|
frame: Frame
|
|
): Promise<{ offsetX: number; offsetY: number }> {
|
|
let offsetX = 0;
|
|
let offsetY = 0;
|
|
let currentFrame: Frame | null = frame;
|
|
while (currentFrame && currentFrame.parentFrame()) {
|
|
const parent = currentFrame.parentFrame();
|
|
if (!currentFrame.isOOPFrame() || !parent) {
|
|
currentFrame = parent;
|
|
continue;
|
|
}
|
|
const { backendNodeId } = await parent._client.send('DOM.getFrameOwner', {
|
|
frameId: currentFrame._id,
|
|
});
|
|
const result = await parent._client.send('DOM.getBoxModel', {
|
|
backendNodeId: backendNodeId,
|
|
});
|
|
if (!result) {
|
|
break;
|
|
}
|
|
const contentBoxQuad = result.model.content;
|
|
const topLeftCorner = this._fromProtocolQuad(contentBoxQuad)[0];
|
|
offsetX += topLeftCorner!.x;
|
|
offsetY += topLeftCorner!.y;
|
|
currentFrame = parent;
|
|
}
|
|
return { offsetX, offsetY };
|
|
}
|
|
|
|
/**
|
|
* Returns the middle point within an element unless a specific offset is provided.
|
|
*/
|
|
async clickablePoint(offset?: Offset): Promise<Point> {
|
|
const [result, layoutMetrics] = await Promise.all([
|
|
this._client
|
|
.send('DOM.getContentQuads', {
|
|
objectId: this._remoteObject.objectId,
|
|
})
|
|
.catch(debugError),
|
|
this._page.client().send('Page.getLayoutMetrics'),
|
|
]);
|
|
if (!result || !result.quads.length)
|
|
throw new Error('Node is either not clickable or not an HTMLElement');
|
|
// Filter out quads that have too small area to click into.
|
|
// Fallback to `layoutViewport` in case of using Firefox.
|
|
const { clientWidth, clientHeight } =
|
|
layoutMetrics.cssLayoutViewport || layoutMetrics.layoutViewport;
|
|
const { offsetX, offsetY } = await this._getOOPIFOffsets(this._frame);
|
|
const quads = result.quads
|
|
.map((quad) => this._fromProtocolQuad(quad))
|
|
.map((quad) => applyOffsetsToQuad(quad, offsetX, offsetY))
|
|
.map((quad) =>
|
|
this._intersectQuadWithViewport(quad, clientWidth, clientHeight)
|
|
)
|
|
.filter((quad) => computeQuadArea(quad) > 1);
|
|
if (!quads.length)
|
|
throw new Error('Node is either not clickable or not an HTMLElement');
|
|
const quad = quads[0]!;
|
|
if (offset) {
|
|
// Return the point of the first quad identified by offset.
|
|
let minX = Number.MAX_SAFE_INTEGER;
|
|
let minY = Number.MAX_SAFE_INTEGER;
|
|
for (const point of quad) {
|
|
if (point.x < minX) {
|
|
minX = point.x;
|
|
}
|
|
if (point.y < minY) {
|
|
minY = point.y;
|
|
}
|
|
}
|
|
if (
|
|
minX !== Number.MAX_SAFE_INTEGER &&
|
|
minY !== Number.MAX_SAFE_INTEGER
|
|
) {
|
|
return {
|
|
x: minX + offset.x,
|
|
y: minY + offset.y,
|
|
};
|
|
}
|
|
}
|
|
// Return the middle point of the first quad.
|
|
let x = 0;
|
|
let y = 0;
|
|
for (const point of quad) {
|
|
x += point.x;
|
|
y += point.y;
|
|
}
|
|
return {
|
|
x: x / 4,
|
|
y: y / 4,
|
|
};
|
|
}
|
|
|
|
private _getBoxModel(): Promise<void | Protocol.DOM.GetBoxModelResponse> {
|
|
const params: Protocol.DOM.GetBoxModelRequest = {
|
|
objectId: this._remoteObject.objectId,
|
|
};
|
|
return this._client
|
|
.send('DOM.getBoxModel', params)
|
|
.catch((error) => debugError(error));
|
|
}
|
|
|
|
private _fromProtocolQuad(quad: number[]): Point[] {
|
|
return [
|
|
{ x: quad[0]!, y: quad[1]! },
|
|
{ x: quad[2]!, y: quad[3]! },
|
|
{ x: quad[4]!, y: quad[5]! },
|
|
{ x: quad[6]!, y: quad[7]! },
|
|
];
|
|
}
|
|
|
|
private _intersectQuadWithViewport(
|
|
quad: Point[],
|
|
width: number,
|
|
height: number
|
|
): Point[] {
|
|
return quad.map((point) => ({
|
|
x: Math.min(Math.max(point.x, 0), width),
|
|
y: Math.min(Math.max(point.y, 0), height),
|
|
}));
|
|
}
|
|
|
|
/**
|
|
* This method scrolls element into view if needed, and then
|
|
* uses {@link Page.mouse} to hover over the center of the element.
|
|
* If the element is detached from DOM, the method throws an error.
|
|
*/
|
|
async hover(): Promise<void> {
|
|
await this._scrollIntoViewIfNeeded();
|
|
const { x, y } = await this.clickablePoint();
|
|
await this._page.mouse.move(x, y);
|
|
}
|
|
|
|
/**
|
|
* This method scrolls element into view if needed, and then
|
|
* uses {@link Page.mouse} to click in the center of the element.
|
|
* If the element is detached from DOM, the method throws an error.
|
|
*/
|
|
async click(options: ClickOptions = {}): Promise<void> {
|
|
await this._scrollIntoViewIfNeeded();
|
|
const { x, y } = await this.clickablePoint(options.offset);
|
|
await this._page.mouse.click(x, y, options);
|
|
}
|
|
|
|
/**
|
|
* This method creates and captures a dragevent from the element.
|
|
*/
|
|
async drag(target: Point): Promise<Protocol.Input.DragData> {
|
|
assert(
|
|
this._page.isDragInterceptionEnabled(),
|
|
'Drag Interception is not enabled!'
|
|
);
|
|
await this._scrollIntoViewIfNeeded();
|
|
const start = await this.clickablePoint();
|
|
return await this._page.mouse.drag(start, target);
|
|
}
|
|
|
|
/**
|
|
* This method creates a `dragenter` event on the element.
|
|
*/
|
|
async dragEnter(
|
|
data: Protocol.Input.DragData = { items: [], dragOperationsMask: 1 }
|
|
): Promise<void> {
|
|
await this._scrollIntoViewIfNeeded();
|
|
const target = await this.clickablePoint();
|
|
await this._page.mouse.dragEnter(target, data);
|
|
}
|
|
|
|
/**
|
|
* This method creates a `dragover` event on the element.
|
|
*/
|
|
async dragOver(
|
|
data: Protocol.Input.DragData = { items: [], dragOperationsMask: 1 }
|
|
): Promise<void> {
|
|
await this._scrollIntoViewIfNeeded();
|
|
const target = await this.clickablePoint();
|
|
await this._page.mouse.dragOver(target, data);
|
|
}
|
|
|
|
/**
|
|
* This method triggers a drop on the element.
|
|
*/
|
|
async drop(
|
|
data: Protocol.Input.DragData = { items: [], dragOperationsMask: 1 }
|
|
): Promise<void> {
|
|
await this._scrollIntoViewIfNeeded();
|
|
const destination = await this.clickablePoint();
|
|
await this._page.mouse.drop(destination, data);
|
|
}
|
|
|
|
/**
|
|
* This method triggers a dragenter, dragover, and drop on the element.
|
|
*/
|
|
async dragAndDrop(
|
|
target: ElementHandle,
|
|
options?: { delay: number }
|
|
): Promise<void> {
|
|
await this._scrollIntoViewIfNeeded();
|
|
const startPoint = await this.clickablePoint();
|
|
const targetPoint = await target.clickablePoint();
|
|
await this._page.mouse.dragAndDrop(startPoint, targetPoint, options);
|
|
}
|
|
|
|
/**
|
|
* Triggers a `change` and `input` event once all the provided options have been
|
|
* selected. If there's no `<select>` element matching `selector`, the method
|
|
* throws an error.
|
|
*
|
|
* @example
|
|
* ```js
|
|
* handle.select('blue'); // single selection
|
|
* handle.select('red', 'green', 'blue'); // multiple selections
|
|
* ```
|
|
* @param values - Values of options to select. If the `<select>` has the
|
|
* `multiple` attribute, all values are considered, otherwise only the first
|
|
* one is taken into account.
|
|
*/
|
|
async select(...values: string[]): Promise<string[]> {
|
|
for (const value of values) {
|
|
assert(
|
|
helper.isString(value),
|
|
'Values must be strings. Found value "' +
|
|
value +
|
|
'" of type "' +
|
|
typeof value +
|
|
'"'
|
|
);
|
|
}
|
|
|
|
return this.evaluate((element: Element, vals: string[]): string[] => {
|
|
const values = new Set(vals);
|
|
if (!(element instanceof HTMLSelectElement)) {
|
|
throw new Error('Element is not a <select> element.');
|
|
}
|
|
|
|
const selectedValues = new Set<string>();
|
|
if (!element.multiple) {
|
|
for (const option of element.options) {
|
|
option.selected = false;
|
|
}
|
|
for (const option of element.options) {
|
|
if (values.has(option.value)) {
|
|
option.selected = true;
|
|
selectedValues.add(option.value);
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
for (const option of element.options) {
|
|
option.selected = values.has(option.value);
|
|
if (option.selected) {
|
|
selectedValues.add(option.value);
|
|
}
|
|
}
|
|
}
|
|
element.dispatchEvent(new Event('input', { bubbles: true }));
|
|
element.dispatchEvent(new Event('change', { bubbles: true }));
|
|
return [...selectedValues.values()];
|
|
}, values);
|
|
}
|
|
|
|
/**
|
|
* This method expects `elementHandle` to point to an
|
|
* {@link https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input | input element}.
|
|
*
|
|
* @param filePaths - Sets the value of the file input to these paths.
|
|
* If a path is relative, then it is resolved against the
|
|
* {@link https://nodejs.org/api/process.html#process_process_cwd | current working directory}.
|
|
* Note for locals script connecting to remote chrome environments,
|
|
* paths must be absolute.
|
|
*/
|
|
async uploadFile(...filePaths: string[]): Promise<void> {
|
|
const isMultiple = await this.evaluate<(element: Element) => boolean>(
|
|
(element) => {
|
|
if (!(element instanceof HTMLInputElement)) {
|
|
throw new Error('uploadFile can only be called on an input element.');
|
|
}
|
|
return element.multiple;
|
|
}
|
|
);
|
|
assert(
|
|
filePaths.length <= 1 || isMultiple,
|
|
'Multiple file uploads only work with <input type=file multiple>'
|
|
);
|
|
|
|
// Locate all files and confirm that they exist.
|
|
let path: typeof import('path');
|
|
try {
|
|
path = await import('path');
|
|
} catch (error) {
|
|
if (error instanceof TypeError) {
|
|
throw new Error(
|
|
`JSHandle#uploadFile can only be used in Node-like environments.`
|
|
);
|
|
}
|
|
throw error;
|
|
}
|
|
const files = filePaths.map((filePath) => {
|
|
if (path.isAbsolute(filePath)) {
|
|
return filePath;
|
|
} else {
|
|
return path.resolve(filePath);
|
|
}
|
|
});
|
|
const { objectId } = this._remoteObject;
|
|
const { node } = await this._client.send('DOM.describeNode', { objectId });
|
|
const { backendNodeId } = node;
|
|
|
|
/* The zero-length array is a special case, it seems that
|
|
DOM.setFileInputFiles does not actually update the files in that case,
|
|
so the solution is to eval the element value to a new FileList directly.
|
|
*/
|
|
if (files.length === 0) {
|
|
await (this as ElementHandle<HTMLInputElement>).evaluate((element) => {
|
|
element.files = new DataTransfer().files;
|
|
|
|
// Dispatch events for this case because it should behave akin to a user action.
|
|
element.dispatchEvent(new Event('input', { bubbles: true }));
|
|
element.dispatchEvent(new Event('change', { bubbles: true }));
|
|
});
|
|
} else {
|
|
await this._client.send('DOM.setFileInputFiles', {
|
|
objectId,
|
|
files,
|
|
backendNodeId,
|
|
});
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This method scrolls element into view if needed, and then uses
|
|
* {@link Touchscreen.tap} to tap in the center of the element.
|
|
* If the element is detached from DOM, the method throws an error.
|
|
*/
|
|
async tap(): Promise<void> {
|
|
await this._scrollIntoViewIfNeeded();
|
|
const { x, y } = await this.clickablePoint();
|
|
await this._page.touchscreen.tap(x, y);
|
|
}
|
|
|
|
/**
|
|
* Calls {@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/focus | focus} on the element.
|
|
*/
|
|
async focus(): Promise<void> {
|
|
await (this as ElementHandle<HTMLElement>).evaluate((element) =>
|
|
element.focus()
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Focuses the element, and then sends a `keydown`, `keypress`/`input`, and
|
|
* `keyup` event for each character in the text.
|
|
*
|
|
* To press a special key, like `Control` or `ArrowDown`,
|
|
* use {@link ElementHandle.press}.
|
|
*
|
|
* @example
|
|
* ```js
|
|
* await elementHandle.type('Hello'); // Types instantly
|
|
* await elementHandle.type('World', {delay: 100}); // Types slower, like a user
|
|
* ```
|
|
*
|
|
* @example
|
|
* An example of typing into a text field and then submitting the form:
|
|
*
|
|
* ```js
|
|
* const elementHandle = await page.$('input');
|
|
* await elementHandle.type('some text');
|
|
* await elementHandle.press('Enter');
|
|
* ```
|
|
*/
|
|
async type(text: string, options?: { delay: number }): Promise<void> {
|
|
await this.focus();
|
|
await this._page.keyboard.type(text, options);
|
|
}
|
|
|
|
/**
|
|
* Focuses the element, and then uses {@link Keyboard.down} and {@link Keyboard.up}.
|
|
*
|
|
* @remarks
|
|
* If `key` is a single character and no modifier keys besides `Shift`
|
|
* are being held down, a `keypress`/`input` event will also be generated.
|
|
* The `text` option can be specified to force an input event to be generated.
|
|
*
|
|
* **NOTE** Modifier keys DO affect `elementHandle.press`. Holding down `Shift`
|
|
* will type the text in upper case.
|
|
*
|
|
* @param key - Name of key to press, such as `ArrowLeft`.
|
|
* See {@link KeyInput} for a list of all key names.
|
|
*/
|
|
async press(key: KeyInput, options?: PressOptions): Promise<void> {
|
|
await this.focus();
|
|
await this._page.keyboard.press(key, options);
|
|
}
|
|
|
|
/**
|
|
* This method returns the bounding box of the element (relative to the main frame),
|
|
* or `null` if the element is not visible.
|
|
*/
|
|
async boundingBox(): Promise<BoundingBox | null> {
|
|
const result = await this._getBoxModel();
|
|
|
|
if (!result) return null;
|
|
|
|
const { offsetX, offsetY } = await this._getOOPIFOffsets(this._frame);
|
|
const quad = result.model.border;
|
|
const x = Math.min(quad[0]!, quad[2]!, quad[4]!, quad[6]!);
|
|
const y = Math.min(quad[1]!, quad[3]!, quad[5]!, quad[7]!);
|
|
const width = Math.max(quad[0]!, quad[2]!, quad[4]!, quad[6]!) - x;
|
|
const height = Math.max(quad[1]!, quad[3]!, quad[5]!, quad[7]!) - y;
|
|
|
|
return { x: x + offsetX, y: y + offsetY, width, height };
|
|
}
|
|
|
|
/**
|
|
* This method returns boxes of the element, or `null` if the element is not visible.
|
|
*
|
|
* @remarks
|
|
*
|
|
* Boxes are represented as an array of points;
|
|
* Each Point is an object `{x, y}`. Box points are sorted clock-wise.
|
|
*/
|
|
async boxModel(): Promise<BoxModel | null> {
|
|
const result = await this._getBoxModel();
|
|
|
|
if (!result) return null;
|
|
|
|
const { offsetX, offsetY } = await this._getOOPIFOffsets(this._frame);
|
|
|
|
const { content, padding, border, margin, width, height } = result.model;
|
|
return {
|
|
content: applyOffsetsToQuad(
|
|
this._fromProtocolQuad(content),
|
|
offsetX,
|
|
offsetY
|
|
),
|
|
padding: applyOffsetsToQuad(
|
|
this._fromProtocolQuad(padding),
|
|
offsetX,
|
|
offsetY
|
|
),
|
|
border: applyOffsetsToQuad(
|
|
this._fromProtocolQuad(border),
|
|
offsetX,
|
|
offsetY
|
|
),
|
|
margin: applyOffsetsToQuad(
|
|
this._fromProtocolQuad(margin),
|
|
offsetX,
|
|
offsetY
|
|
),
|
|
width,
|
|
height,
|
|
};
|
|
}
|
|
|
|
/**
|
|
* This method scrolls element into view if needed, and then uses
|
|
* {@link Page.screenshot} to take a screenshot of the element.
|
|
* If the element is detached from DOM, the method throws an error.
|
|
*/
|
|
async screenshot(options: ScreenshotOptions = {}): Promise<string | Buffer> {
|
|
let needsViewportReset = false;
|
|
|
|
let boundingBox = await this.boundingBox();
|
|
assert(boundingBox, 'Node is either not visible or not an HTMLElement');
|
|
|
|
const viewport = this._page.viewport();
|
|
assert(viewport);
|
|
|
|
if (
|
|
boundingBox.width > viewport.width ||
|
|
boundingBox.height > viewport.height
|
|
) {
|
|
const newViewport = {
|
|
width: Math.max(viewport.width, Math.ceil(boundingBox.width)),
|
|
height: Math.max(viewport.height, Math.ceil(boundingBox.height)),
|
|
};
|
|
await this._page.setViewport(Object.assign({}, viewport, newViewport));
|
|
|
|
needsViewportReset = true;
|
|
}
|
|
|
|
await this._scrollIntoViewIfNeeded();
|
|
|
|
boundingBox = await this.boundingBox();
|
|
assert(boundingBox, 'Node is either not visible or not an HTMLElement');
|
|
assert(boundingBox.width !== 0, 'Node has 0 width.');
|
|
assert(boundingBox.height !== 0, 'Node has 0 height.');
|
|
|
|
const layoutMetrics = await this._client.send('Page.getLayoutMetrics');
|
|
// Fallback to `layoutViewport` in case of using Firefox.
|
|
const { pageX, pageY } =
|
|
layoutMetrics.cssVisualViewport || layoutMetrics.layoutViewport;
|
|
|
|
const clip = Object.assign({}, boundingBox);
|
|
clip.x += pageX;
|
|
clip.y += pageY;
|
|
|
|
const imageData = await this._page.screenshot(
|
|
Object.assign(
|
|
{},
|
|
{
|
|
clip,
|
|
},
|
|
options
|
|
)
|
|
);
|
|
|
|
if (needsViewportReset) await this._page.setViewport(viewport);
|
|
|
|
return imageData;
|
|
}
|
|
|
|
/**
|
|
* Runs `element.querySelector` within the page.
|
|
*
|
|
* @param selector - The selector to query with.
|
|
* @returns `null` if no element matches the selector.
|
|
* @throws `Error` if the selector has no associated query handler.
|
|
*/
|
|
async $<T extends Element = Element>(
|
|
selector: string
|
|
): Promise<ElementHandle<T> | null> {
|
|
const { updatedSelector, queryHandler } =
|
|
getQueryHandlerAndSelector(selector);
|
|
assert(
|
|
queryHandler.queryOne,
|
|
'Cannot handle queries for a single element with the given selector'
|
|
);
|
|
return queryHandler.queryOne(this, updatedSelector);
|
|
}
|
|
|
|
/**
|
|
* Runs `element.querySelectorAll` within the page. If no elements match the selector,
|
|
* the return value resolves to `[]`.
|
|
*/
|
|
/**
|
|
* Runs `element.querySelectorAll` within the page.
|
|
*
|
|
* @param selector - The selector to query with.
|
|
* @returns `[]` if no element matches the selector.
|
|
* @throws `Error` if the selector has no associated query handler.
|
|
*/
|
|
async $$<T extends Element = Element>(
|
|
selector: string
|
|
): Promise<Array<ElementHandle<T>>> {
|
|
const { updatedSelector, queryHandler } =
|
|
getQueryHandlerAndSelector(selector);
|
|
assert(
|
|
queryHandler.queryAll,
|
|
'Cannot handle queries for a multiple element with the given selector'
|
|
);
|
|
return queryHandler.queryAll(this, updatedSelector);
|
|
}
|
|
|
|
/**
|
|
* This method runs `document.querySelector` within the element and passes it as
|
|
* the first argument to `pageFunction`. If there's no element matching `selector`,
|
|
* the method throws an error.
|
|
*
|
|
* If `pageFunction` returns a Promise, then `frame.$eval` would wait for the promise
|
|
* to resolve and return its value.
|
|
*
|
|
* @example
|
|
* ```js
|
|
* const tweetHandle = await page.$('.tweet');
|
|
* expect(await tweetHandle.$eval('.like', node => node.innerText)).toBe('100');
|
|
* expect(await tweetHandle.$eval('.retweets', node => node.innerText)).toBe('10');
|
|
* ```
|
|
*/
|
|
async $eval<ReturnType>(
|
|
selector: string,
|
|
pageFunction: (
|
|
element: Element,
|
|
...args: unknown[]
|
|
) => ReturnType | Promise<ReturnType>,
|
|
...args: SerializableOrJSHandle[]
|
|
): Promise<WrapElementHandle<ReturnType>> {
|
|
const elementHandle = await this.$(selector);
|
|
if (!elementHandle)
|
|
throw new Error(
|
|
`Error: failed to find element matching selector "${selector}"`
|
|
);
|
|
const result = await elementHandle.evaluate<
|
|
(
|
|
element: Element,
|
|
...args: SerializableOrJSHandle[]
|
|
) => ReturnType | Promise<ReturnType>
|
|
>(pageFunction, ...args);
|
|
await elementHandle.dispose();
|
|
|
|
/**
|
|
* This `as` is a little unfortunate but helps TS understand the behavior of
|
|
* `elementHandle.evaluate`. If evaluate returns an element it will return an
|
|
* ElementHandle instance, rather than the plain object. All the
|
|
* WrapElementHandle type does is wrap ReturnType into
|
|
* ElementHandle<ReturnType> if it is an ElementHandle, or leave it alone as
|
|
* ReturnType if it isn't.
|
|
*/
|
|
return result as WrapElementHandle<ReturnType>;
|
|
}
|
|
|
|
/**
|
|
* This method runs `document.querySelectorAll` within the element and passes it as
|
|
* the first argument to `pageFunction`. If there's no element matching `selector`,
|
|
* the method throws an error.
|
|
*
|
|
* If `pageFunction` returns a Promise, then `frame.$$eval` would wait for the
|
|
* promise to resolve and return its value.
|
|
*
|
|
* @example
|
|
* ```html
|
|
* <div class="feed">
|
|
* <div class="tweet">Hello!</div>
|
|
* <div class="tweet">Hi!</div>
|
|
* </div>
|
|
* ```
|
|
*
|
|
* @example
|
|
* ```js
|
|
* const feedHandle = await page.$('.feed');
|
|
* expect(await feedHandle.$$eval('.tweet', nodes => nodes.map(n => n.innerText)))
|
|
* .toEqual(['Hello!', 'Hi!']);
|
|
* ```
|
|
*/
|
|
async $$eval<ReturnType>(
|
|
selector: string,
|
|
pageFunction: EvaluateFn<
|
|
Element[],
|
|
unknown,
|
|
ReturnType | Promise<ReturnType>
|
|
>,
|
|
...args: SerializableOrJSHandle[]
|
|
): Promise<WrapElementHandle<ReturnType>> {
|
|
const { updatedSelector, queryHandler } =
|
|
getQueryHandlerAndSelector(selector);
|
|
assert(queryHandler.queryAllArray);
|
|
const arrayHandle = await queryHandler.queryAllArray(this, updatedSelector);
|
|
const result = await arrayHandle.evaluate<EvaluateFn<Element[]>>(
|
|
pageFunction,
|
|
...args
|
|
);
|
|
await arrayHandle.dispose();
|
|
/* This `as` exists for the same reason as the `as` in $eval above.
|
|
* See the comment there for a full explanation.
|
|
*/
|
|
return result as WrapElementHandle<ReturnType>;
|
|
}
|
|
|
|
/**
|
|
* The method evaluates the XPath expression relative to the elementHandle.
|
|
* If there are no such elements, the method will resolve to an empty array.
|
|
* @param expression - Expression to {@link https://developer.mozilla.org/en-US/docs/Web/API/Document/evaluate | evaluate}
|
|
*/
|
|
async $x(expression: string): Promise<ElementHandle[]> {
|
|
const arrayHandle = await this.evaluateHandle(
|
|
(element: Document, expression: string) => {
|
|
const document = element.ownerDocument || element;
|
|
const iterator = document.evaluate(
|
|
expression,
|
|
element,
|
|
null,
|
|
XPathResult.ORDERED_NODE_ITERATOR_TYPE
|
|
);
|
|
const array = [];
|
|
let item;
|
|
while ((item = iterator.iterateNext())) array.push(item);
|
|
return array;
|
|
},
|
|
expression
|
|
);
|
|
const properties = await arrayHandle.getProperties();
|
|
await arrayHandle.dispose();
|
|
const result = [];
|
|
for (const property of properties.values()) {
|
|
const elementHandle = property.asElement();
|
|
if (elementHandle) result.push(elementHandle);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Resolves to true if the element is visible in the current viewport.
|
|
*/
|
|
async isIntersectingViewport(options?: {
|
|
threshold?: number;
|
|
}): Promise<boolean> {
|
|
const { threshold = 0 } = options || {};
|
|
return await this.evaluate(async (element: Element, threshold: number) => {
|
|
const visibleRatio = await new Promise<number>((resolve) => {
|
|
const observer = new IntersectionObserver((entries) => {
|
|
resolve(entries[0]!.intersectionRatio);
|
|
observer.disconnect();
|
|
});
|
|
observer.observe(element);
|
|
});
|
|
return threshold === 1 ? visibleRatio === 1 : visibleRatio > threshold;
|
|
}, threshold);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @public
|
|
*/
|
|
export interface Offset {
|
|
/**
|
|
* x-offset for the clickable point relative to the top-left corder of the border box.
|
|
*/
|
|
x: number;
|
|
/**
|
|
* y-offset for the clickable point relative to the top-left corder of the border box.
|
|
*/
|
|
y: number;
|
|
}
|
|
|
|
/**
|
|
* @public
|
|
*/
|
|
export interface ClickOptions {
|
|
/**
|
|
* Time to wait between `mousedown` and `mouseup` in milliseconds.
|
|
*
|
|
* @defaultValue 0
|
|
*/
|
|
delay?: number;
|
|
/**
|
|
* @defaultValue 'left'
|
|
*/
|
|
button?: MouseButton;
|
|
/**
|
|
* @defaultValue 1
|
|
*/
|
|
clickCount?: number;
|
|
/**
|
|
* Offset for the clickable point relative to the top-left corder of the border box.
|
|
*/
|
|
offset?: Offset;
|
|
}
|
|
|
|
/**
|
|
* @public
|
|
*/
|
|
export interface PressOptions {
|
|
/**
|
|
* Time to wait between `keydown` and `keyup` in milliseconds. Defaults to 0.
|
|
*/
|
|
delay?: number;
|
|
/**
|
|
* If specified, generates an input event with this text.
|
|
*/
|
|
text?: string;
|
|
}
|
|
|
|
/**
|
|
* @public
|
|
*/
|
|
export interface Point {
|
|
x: number;
|
|
y: number;
|
|
}
|
|
|
|
function computeQuadArea(quad: Point[]): number {
|
|
/* Compute sum of all directed areas of adjacent triangles
|
|
https://en.wikipedia.org/wiki/Polygon#Simple_polygons
|
|
*/
|
|
let area = 0;
|
|
for (let i = 0; i < quad.length; ++i) {
|
|
const p1 = quad[i]!;
|
|
const p2 = quad[(i + 1) % quad.length]!;
|
|
area += (p1.x * p2.y - p2.x * p1.y) / 2;
|
|
}
|
|
return Math.abs(area);
|
|
}
|