How can I wait for network idle after click on an element in puppeteer?

问题

const browser = await puppeteer.launch({headless: false});
await page.goto(url, {waitUntil: 'networkidle'});

await page.click('.to_cart'); //Click on element trigger ajax request
//Now I need wait network idle(Wait for the request complete)
await page.click('.to_cart');

UPD: No navigation after the element was clicked

回答1:

I ran into a similar issue and found the workaround function on the Puppeteer Control networkidle wait time issue to suit my needs: https://github.com/GoogleChrome/puppeteer/issues/1353#issuecomment-356561654

Essentially, you can create a custom function, and call that prior to any additional steps:

function waitForNetworkIdle(page, timeout, maxInflightRequests = 0) {
  page.on('request', onRequestStarted);
  page.on('requestfinished', onRequestFinished);
  page.on('requestfailed', onRequestFinished);

  let inflight = 0;
  let fulfill;
  let promise = new Promise(x => fulfill = x);
  let timeoutId = setTimeout(onTimeoutDone, timeout);
  return promise;

  function onTimeoutDone() {
    page.removeListener('request', onRequestStarted);
    page.removeListener('requestfinished', onRequestFinished);
    page.removeListener('requestfailed', onRequestFinished);
    fulfill();
  }

  function onRequestStarted() {
    ++inflight;
    if (inflight > maxInflightRequests)
      clearTimeout(timeoutId);
  }

  function onRequestFinished() {
    if (inflight === 0)
      return;
    --inflight;
    if (inflight === maxInflightRequests)
      timeoutId = setTimeout(onTimeoutDone, timeout);
  }
}

// Example
await Promise.all([
  page.goto('https://google.com'),
  waitForNetworkIdle(page, 500, 0), // equivalent to 'networkidle0'
]);

回答2:

There is two method in puppeteer.

page.waitForRequest(urlOrPredicate[, options])
page.waitForResponse(urlOrPredicate[, options])

Example:

await promise.all([page.waitForRequest(callback), page.waitForResponse(callback)])

回答3:

Directly from the docs

This resolves when the page navigates to a new URL or reloads. It is useful for when you run code which will indirectly cause the page to navigate. Consider this example:

const [response] = await Promise.all([
  page.waitForNavigation(), // The promise resolves after navigation has finished
  page.click('a.my-link'), // Clicking the link will indirectly cause a navigation
]);

来源：https://stackoverflow.com/questions/54377650/how-can-i-wait-for-network-idle-after-click-on-an-element-in-puppeteer

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javascript

node.js

Puppeteer