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Kenil Vasani
Kenil Vasani

Kenil Vasani

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Asked: 2020-12-19T21:58:45+00:00 In:

puppeteer: wait N seconds before continuing to the next line

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In puppeteer I would like to wait a defined time before going to the next line of code.

I’ve tried to put a setTimeout in an evaluate function but it seems to be simply ignored

console.log('before waiting');
await page.evaluate(async() => {
  setTimeout(function(){
      console.log('waiting');
  }, 4000)
});
console.log('after waiting');

This code don’t wait and just write before waiting and after waiting

Do you know how to do this?

browser-testingchromiumjavascriptnode.jspuppeteer
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    1 Answer

    1. Kenil Vasani

      Kenil Vasani

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      Best Answer

      You can use a little promise function,

      function delay(time) {
   return new Promise(function(resolve) { 
       setTimeout(resolve, time)
   });
}

      Then, call it whenever you want a delay.

      console.log('before waiting');
await delay(4000);
console.log('after waiting');

      If you must use puppeteer use the builtin waitForTimeout function.

      await page.waitForTimeout(4000)

      If you still want to use page.evaluate, resolve it after 4 seconds. You are not resolving anything.

      await page.evaluate(async() => {
    await new Promise(function(resolve) { 
           setTimeout(resolve, 1000)
    });
});

      But I guess you can simply use the first two examples.

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