mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
65 lines
2.3 KiB
Markdown
65 lines
2.3 KiB
Markdown
<!-- Do not edit this file. It is automatically generated by API Documenter. -->
|
|
|
|
[Home](./index.md) > [puppeteer](./puppeteer.md) > [Page](./puppeteer.page.md) > [waitForSelector](./puppeteer.page.waitforselector.md)
|
|
|
|
## Page.waitForSelector() method
|
|
|
|
Wait for the `selector` to appear in page. If at the moment of calling the method the `selector` already exists, the method will return immediately. If the `selector` doesn't appear after the `timeout` milliseconds of waiting, the function will throw.
|
|
|
|
This method works across navigations:
|
|
|
|
```js
|
|
const puppeteer = require('puppeteer');
|
|
(async () => {
|
|
const browser = await puppeteer.launch();
|
|
const page = await browser.newPage();
|
|
let currentURL;
|
|
page
|
|
.waitForSelector('img')
|
|
.then(() => console.log('First URL with image: ' + currentURL));
|
|
for (currentURL of [
|
|
'https://example.com',
|
|
'https://google.com',
|
|
'https://bbc.com',
|
|
]) {
|
|
await page.goto(currentURL);
|
|
}
|
|
await browser.close();
|
|
})();
|
|
|
|
```
|
|
|
|
<b>Signature:</b>
|
|
|
|
```typescript
|
|
waitForSelector(selector: string, options?: {
|
|
visible?: boolean;
|
|
hidden?: boolean;
|
|
timeout?: number;
|
|
}): Promise<ElementHandle | null>;
|
|
```
|
|
|
|
## Parameters
|
|
|
|
| Parameter | Type | Description |
|
|
| --- | --- | --- |
|
|
| selector | string | A [selector](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors) of an element to wait for |
|
|
| options | { visible?: boolean; hidden?: boolean; timeout?: number; } | Optional waiting parameters |
|
|
|
|
<b>Returns:</b>
|
|
|
|
Promise<[ElementHandle](./puppeteer.elementhandle.md) \| null>
|
|
|
|
Promise which resolves when element specified by selector string is added to DOM. Resolves to `null` if waiting for hidden: `true` and selector is not found in DOM.
|
|
|
|
## Remarks
|
|
|
|
The optional Parameter in Arguments `options` are :
|
|
|
|
- `Visible`: A boolean wait for element to be present in DOM and to be visible, i.e. to not have `display: none` or `visibility: hidden` CSS properties. Defaults to `false`.
|
|
|
|
- `hidden`: ait for element to not be found in the DOM or to be hidden, i.e. have `display: none` or `visibility: hidden` CSS properties. Defaults to `false`.
|
|
|
|
- `timeout`: maximum time to wait for in milliseconds. Defaults to `30000` (30 seconds). Pass `0` to disable timeout. The default value can be changed by using the [Page.setDefaultTimeout()](./puppeteer.page.setdefaulttimeout.md) method.
|
|
|