fix: update documentation on configuring puppeteer (#9150 )

This PR updates the docs regarding configuring puppeteer. In addition,
some changes have been made to the documentation generator to show
default values on the documentation site.

Also fixes: https://github.com/puppeteer/puppeteer/pull/9144

2022-10-24 09:07:05 +02:00

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Frame.waitForSelector

Frame.waitForSelector() method

Waits for an element matching the given selector to appear in the frame.

This method works across navigations.

Signature:

class Frame {
  waitForSelector<Selector extends string>(
    selector: Selector,
    options?: WaitForSelectorOptions
  ): Promise<ElementHandle<NodeFor<Selector>> | null>;
}

Parameters

Parameter	Type	Description
selector	Selector	The selector to query and wait for.
options	WaitForSelectorOptions	(Optional) Options for customizing waiting behavior.

Returns:

Promise<ElementHandle<NodeFor<Selector>> | null>

An element matching the given selector.

Exceptions

Throws if an element matching the given selector doesn't appear.

Example

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  let currentURL;
  page
    .mainFrame()
    .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();
})();

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