64 lines
2.8 KiB
Markdown
64 lines
2.8 KiB
Markdown
---
|
|
sidebar_label: Page.waitForSelector
|
|
---
|
|
|
|
# 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:
|
|
|
|
```ts
|
|
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();
|
|
})();
|
|
```
|
|
|
|
**Signature:**
|
|
|
|
```typescript
|
|
class Page {
|
|
waitForSelector<Selector extends string>(
|
|
selector: Selector,
|
|
options?: Exclude<WaitForSelectorOptions, 'root'>
|
|
): Promise<ElementHandle<NodeFor<Selector>> | null>;
|
|
}
|
|
```
|
|
|
|
## Parameters
|
|
|
|
| Parameter | Type | Description |
|
|
| --------- | -------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------ |
|
|
| selector | Selector | A [selector](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors) of an element to wait for |
|
|
| options | Exclude<[WaitForSelectorOptions](./puppeteer.waitforselectoroptions.md), 'root'> | <i>(Optional)</i> Optional waiting parameters |
|
|
|
|
**Returns:**
|
|
|
|
Promise<[ElementHandle](./puppeteer.elementhandle.md)<[NodeFor](./puppeteer.nodefor.md)<Selector>> \| 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.
|