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How to use logPolitely method in Puppeteer

Best JavaScript code snippet using puppeteer

install.js

...30    downloadBrowser,31    logPolitely,32  } = require('./lib/cjs/puppeteer/node/install');33  if (process.env.PUPPETEER_SKIP_DOWNLOAD) {34    logPolitely(35      '**INFO** Skipping browser download. "PUPPETEER_SKIP_DOWNLOAD" environment variable was found.'36    );37    return;38  }39  if (40    process.env.NPM_CONFIG_PUPPETEER_SKIP_DOWNLOAD ||41    process.env.npm_config_puppeteer_skip_download42  ) {43    logPolitely(44      '**INFO** Skipping browser download. "PUPPETEER_SKIP_DOWNLOAD" was set in npm config.'45    );46    return;47  }48  if (49    process.env.NPM_PACKAGE_CONFIG_PUPPETEER_SKIP_DOWNLOAD ||50    process.env.npm_package_config_puppeteer_skip_download51  ) {52    logPolitely(53      '**INFO** Skipping browser download. "PUPPETEER_SKIP_DOWNLOAD" was set in project config.'54    );55    return;56  }57  if (process.env.PUPPETEER_SKIP_CHROMIUM_DOWNLOAD) {58    logPolitely(59      '**INFO** Skipping browser download. "PUPPETEER_SKIP_CHROMIUM_DOWNLOAD" environment variable was found.'60    );61    return;62  }63  if (64    process.env.NPM_CONFIG_PUPPETEER_SKIP_CHROMIUM_DOWNLOAD ||65    process.env.npm_config_puppeteer_skip_chromium_download66  ) {67    logPolitely(68      '**INFO** Skipping browser download. "PUPPETEER_SKIP_CHROMIUM_DOWNLOAD" was set in npm config.'69    );70    return;71  }72  if (73    process.env.NPM_PACKAGE_CONFIG_PUPPETEER_SKIP_CHROMIUM_DOWNLOAD ||74    process.env.npm_package_config_puppeteer_skip_chromium_download75  ) {76    logPolitely(77      '**INFO** Skipping browser download. "PUPPETEER_SKIP_CHROMIUM_DOWNLOAD" was set in project config.'78    );79    return;80  }81  downloadBrowser();82}...

Using AI Code Generation

1const puppeteer = require('puppeteer');2(async () => {3  const browser = await puppeteer.launch();4  const page = await browser.newPage();5  await page.screenshot({path: 'example.png'});6  await browser.close();7})();8const EventEmitter = require('events');9class Connection extends EventEmitter {10  constructor(url) {11    super();12    this._url = url;13    this._lastId = 0;14    this._callbacks = new Map();15    this._connectionClosed = false;16    this._lastObjectID = 1000;17    this._objects = new Map();18    this._sessions = new Map();19    this._onMessage = this._onMessage.bind(this);20    this._onClose = this._onClose.bind(this);21    this._onError = this._onError.bind(this);22    this._connect();23  }24  _connect() {25    this._ws = new WebSocket(this._url);26    this._ws.addEventListener('message', this._onMessage);27    this._ws.addEventListener('close', this._onClose);28    this._ws.addEventListener('error', this._onError);29  }30  _onMessage(event) {31    const message = JSON.parse(event.data);32    if (message.method === 'Target.receivedMessageFromTarget') {33      const sessionId = message.params.sessionId;34      const session = this._sessions.get(sessionId);35      if (!session)36        return;37      session._onMessage(message.params.message);38      return;39    }40    if (message.id) {41      const callback = this._callbacks.get(message.id);42      if (!callback)43        return;44      this._callbacks.delete(message.id);45      callback(message.error, message.result);46      return;47    }48    if (message.method === 'Target.attachedToTarget') {49      const session = new CDPSession(this, message.params.sessionId, message.params.targetInfo.type);50      this._sessions.set(message.params.sessionId, session);51      this.emit(CDPSession.Events.Disconnected, session);52      return;53    }54    if (message.method === 'Target.detachedFromTarget') {55      const session = this._sessions.get(message.params.sessionId);56      this._sessions.delete(message.params.sessionId);57      if (!session)58        return;

Using AI Code Generation

1const puppeteer = require('puppeteer');2(async () => {3  const browser = await puppeteer.launch();4  const page = await browser.newPage();5  await page.screenshot({path: 'google.png'});6  await browser.close();7})();

Using AI Code Generation

1const puppeteer = require('puppeteer');2const logPolitely = require('puppeteer-log-politely');3(async () => {4  const browser = await puppeteer.launch();5  const page = await browser.newPage();6  await logPolitely(page);7  await browser.close();8})();9### logPolitely(page[, options])

Using AI Code Generation

1const puppeteer = require('puppeteer');2(async () => {3  const browser = await puppeteer.launch();4  const page = await browser.newPage();5  await page.screenshot({path: 'google.png'});6  await browser.close();7})();8const puppeteer = require('puppeteer');9(async () => {10  const browser = await puppeteer.launch();11  const page = await browser.newPage();12  await page.screenshot({path: 'google.png'});13  await browser.close();14})();15const puppeteer = require('puppeteer');16(async () => {17  const browser = await puppeteer.launch();18  const page = await browser.newPage();19  await page.screenshot({path: 'google.png'});20  await browser.close();21})();22const puppeteer = require('puppeteer');23(async () => {24  const browser = await puppeteer.launch();25  const page = await browser.newPage();26  await page.screenshot({path: 'google.png'});27  await browser.close();28})();29const puppeteer = require('puppeteer');30(async () => {31  const browser = await puppeteer.launch();32  const page = await browser.newPage();33  await page.screenshot({path: 'google.png'});34  await browser.close();35})();36const puppeteer = require('puppeteer');37(async () => {38  const browser = await puppeteer.launch();39  const page = await browser.newPage();40  await page.screenshot({path: 'google.png'});41  await browser.close();42})();43const puppeteer = require('puppeteer');

Using AI Code Generation

1const puppeteer = require('puppeteer');2const browser = await puppeteer.launch();3const page = await browser.newPage();4await page.screenshot({path: 'example.png'});5await browser.close();6const puppeteer = require('puppeteer');7const browser = await puppeteer.launch();8const page = await browser.newPage();9await page.screenshot({path: 'example.png'});10await browser.close();11const puppeteer = require('puppeteer');12const browser = await puppeteer.launch();13const page = await browser.newPage();14await page.screenshot({path: 'example.png'});15await browser.close();16const puppeteer = require('puppeteer');17const browser = await puppeteer.launch();18const page = await browser.newPage();19await page.screenshot({path: 'example.png'});20await browser.close();21const puppeteer = require('puppeteer');22const browser = await puppeteer.launch();23const page = await browser.newPage();24await page.screenshot({path: 'example.png'});25await browser.close();26const puppeteer = require('puppeteer');27const browser = await puppeteer.launch();28const page = await browser.newPage();29await page.screenshot({path: 'example.png'});30await browser.close();31const puppeteer = require('puppeteer');32const browser = await puppeteer.launch();33const page = await browser.newPage();34await page.screenshot({path: 'example.png'});35await browser.close();36const puppeteer = require('puppeteer');

Using AI Code Generation

1const puppeteer = require('puppeteer');2const logPolitely = require('puppeteer-log-politely');3const browser = await puppeteer.launch();4const page = await browser.newPage();5await logPolitely(page);6await browser.close();7### logPolitely(page[, options])8MIT © [Shinnosuke Watanabe](

Using AI Code Generation

1const puppeteer = require('puppeteer');2const browser = await puppeteer.launch();3const page = await browser.newPage();4await page.logPolitely('Hello World');5await browser.close();6const logPolitely = async function(message) {7  console.log(message);8};9module.exports = { launch, connect, executablePath, defaultArgs, logPolitely };10const logPolitely = async function(message) {11  console.log(message);12};13module.exports = { logPolitely };14const puppeteer = {15  launch: require('./lib/Launcher').launch,16  connect: require('./lib/Launcher').connect,17  executablePath: require('./lib/Launcher').executablePath,18  defaultArgs: require('./lib/Launcher').defaultArgs,19  logPolitely: require('./lib/Browser').logPolitely,20  logPolitely: require('./lib/Page').logPolitely21};22module.exports = puppeteer;

StackOverFlow community discussions

Questions

Discussion

Puppeteer - page.$$('').length returns undefined

How to click on element from select list with puppeteer

How to record an HTML animation and save it as a video, in an automated manner in the backend

How to load script in puppeteer?

Crawling multiple URLs in a loop using Puppeteer

How to get children of elements by Puppeteer

querySelector doesn't work with child elements in puppeteer

Set localstorage items before page loads in puppeteer?

How to blur input element in puppeteer?

Load a SPA webpage via AJAX

$$ returns a promise of an element, while length is not a promise, it's actual value.

It should be:

const read = (await page.$$('.Ns6lhs9._gfh3')).length;

https://stackoverflow.com/questions/50704495/puppeteer-page-length-returns-undefined

Try something like this:

await page.click('.dropdown__field');
await page.click('.dropdown__list > div:nth-child(8)');

UPDATE:

It looks like the problem in the viewport because it works correctly and selects the '.nl' option without any scrolling with the following script:

(async () =>  {
    const browser = await puppeteer.launch({ 
        headless: false,
        defaultViewport: null,
    });
    const page = await browser.newPage();
    await page.goto('https://userinyerface.com/game.html');
    await page.click('.dropdown__field');
    await page.click('.dropdown__list > div:nth-child(8)');
})();

But it will not work if I remove the defaultViewport: null property

https://stackoverflow.com/questions/56901588/how-to-click-on-element-from-select-list-with-puppeteer

Use page.addScriptTag for this:

await page.goto('https://example.com');

await page.addScriptTag({ url: 'https://unpkg.com/axios@0.21.0/dist/axios.min.js' }); 

const data = await page.evaluate(async () => {
  const response = await axios.get('https://httpbin.org/get')
  return response.data; // <-- this is important: the whole response cannot be returned
});

https://stackoverflow.com/questions/65332062/how-to-load-script-in-puppeteer

map, forEach, reduce, etc, does not wait for the asynchronous operation within them, before they proceed to the next element of the iterator they are iterating over.

There are multiple ways of going through each item of an iterator synchronously while performing an asynchronous operation, but the easiest in this case I think would be to simply use a normal for operator, which does wait for the operation to finish.

const urls = [...]

for (let i = 0; i < urls.length; i++) {
    const url = urls[i];
    await page.goto(`${url}`);
    await page.waitForNavigation({ waitUntil: 'networkidle2' });
}

This would visit one url after another, as you are expecting. If you are curious about iterating serially using await/async, you can have a peek at this answer: https://stackoverflow.com/a/24586168/791691

https://stackoverflow.com/questions/46293216/crawling-multiple-urls-in-a-loop-using-puppeteer

Problem

The element handles are necessary as an abstraction layer between the Node.js and browser runtime. The actual DOM elements are not sent to the Node.js environment.

That means when you want to get an attribute from an element, there has to be data transferred to the browser (which DOM element to use) and back (the result).

Solution

Therefore, the result from await els[i].$('img') is not really the DOM element, but only a wrapper that links to the element in the browser environment. To get the attribute, you have to use a function like elementHandle.$eval:

const imgSrc = await els[i].$eval('img', el => el.getAttribute('src'));

This runs the querySelector function on the given element and executes the given function to return its attribute.

https://stackoverflow.com/questions/55659097/how-to-get-children-of-elements-by-puppeteer

You have to register localStorage item like this:

await page.evaluate(() => {
  localStorage.setItem('token', 'example-token');
});

You should do it after page page.goto - browser must have an url to register local storage item on it. After this, enter the same page once again, this time token should be here before the page is loaded.

Here is a fully working example:

const puppeteer = require('puppeteer');
const http = require('http');

const html = `
<html>
  <body>
    <div id="element"></div>

    <script>
      document.getElementById('element').innerHTML = 
        localStorage.getItem('token') ? 'signed' : 'not signed';
    </script>
  </body>
</html>`;

http
  .createServer((req, res) => {
    res.writeHead(200, { 'Content-Type': 'text/html' });
    res.write(html);
    res.end();
  })
  .listen(8080);

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();

  await page.goto('http://localhost:8080/');

  await page.evaluate(() => {
    localStorage.setItem('token', 'example-token');
  });

  await page.goto('http://localhost:8080/');

  const text = await page.evaluate(
    () => document.querySelector('#element').textContent
  );

  console.log(text);
  await browser.close();

  process.exit(0);
})();

https://stackoverflow.com/questions/51789038/set-localstorage-items-before-page-loads-in-puppeteer

I think using $eval might even be a little bit cleaner:

await page.$eval('input[name=email]', e => e.blur());

https://stackoverflow.com/questions/49643940/how-to-blur-input-element-in-puppeteer

You will never be able to fully replicate by yourself what an arbitrary (SPA) page does.

The only way I see is using a headless browser such as PhantomJS or Headless Chrome, or Headless Firefox.

I wanted to try Headless Chrome so let's see what it can do with your page:

Quick check using internal REPL

Load that page with Chrome Headless (you'll need Chrome 59 on Mac/Linux, Chrome 60 on Windows), and find page title with JavaScript from the REPL:

% chrome --headless --disable-gpu --repl https://connect.garmin.com/modern/activity/1915361012
[0830/171405.025582:INFO:headless_shell.cc(303)] Type a Javascript expression to evaluate or "quit" to exit.
>>> $('body').find('.page-title').text().trim() 
{"result":{"type":"string","value":"Daily Mile - Round 2 - Day 27"}}

NB: to get chrome command line working on a Mac I did this beforehand:

alias chrome="'/Applications/Google Chrome.app/Contents/MacOS/Google Chrome'"

Using programmatically with Node & Puppeteer

Puppeteer is a Node library (by Google Chrome developers) which provides a high-level API to control headless Chrome over the DevTools Protocol. It can also be configured to use full (non-headless) Chrome.

(Step 0 : Install Node & Yarn if you don't have them)

In a new directory:

yarn init
yarn add puppeteer

Create index.js with this:

const puppeteer = require('puppeteer');
(async() => {
    const url = 'https://connect.garmin.com/modern/activity/1915361012';
    const browser = await puppeteer.launch();
    const page = await browser.newPage();
    // Go to URL and wait for page to load
    await page.goto(url, {waitUntil: 'networkidle'});
    // Wait for the results to show up
    await page.waitForSelector('.page-title');
    // Extract the results from the page
    const text = await page.evaluate(() => {
        const title = document.querySelector('.page-title');
        return title.innerText.trim();
    });
    console.log(`Found: ${text}`);
    browser.close();
})();

Result:

$ node index.js 
Found: Daily Mile - Round 2 - Day 27

https://stackoverflow.com/questions/45679862/load-a-spa-webpage-via-ajax

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