2808 explained code solutions for 75 technologies


chrome-headlessHow to trigger mouse click in headless mode


Execute this javascript file using nodejs:

const chromeLauncher = require('chrome-launcher');
const CDP = require('chrome-remote-interface');
const fs = require('fs');

chromeLauncher.launch({ port: 9222, chromeFlags: [ '--window-size=400,800', '--headless' ] }).then(function(chrome) {
  CDP(async (client) => {
    const {Page} = client;
    await Page.enable();
    await Page.navigate({url: 'https://github.com'});
    await Page.loadEventFired();
    
    const options = { x: 350, y: 20, button: 'left', clickCount: 1 };
    Promise.resolve().then(() => {
      options.type = 'mousePressed';
      return client.Input.dispatchMouseEvent(options);
    }).then(() => {
      options.type = 'mouseReleased';
      return client.Input.dispatchMouseEvent(options);
    });
    
    const {data} = await Page.captureScreenshot();
    fs.writeFileSync('screen.png', Buffer.from(data, 'base64'));
    await client.close();
    chrome.kill();
  });
});ctrl + c
require('chrome-launcher')

Chrome-Launcher library to start/stop Chrome browser programmatically

require('chrome-remote-interface')

Chrome-Remote-Interface library to operate

chromeLauncher.launch

launch Chrome with specified params

CDP(async (client)

init remote debugging interface connection when browser is ready

const options

define options for mouse event (coordinates are targeted on right menu)

mousePressed

first send this event

mouseReleased

then tell chrome mouse was released

Page.captureScreenshot()

capture screenshot to check if mouse was really clicked and browser reacted