Here we generate a CSV file and have the browser download it await page. log( 'CHILD: url received from parent process', url) Ĭonst browser = await puppeteer.Const puppeteer = require ( 'puppeteer' ) Ĭonst browser = await puppeteer.launch() In our prior example, we didn't care about the file-system in any capacity, however that changes if you wish to continue to use puppeteer in your code-base and call it programatically. The code snippet below is a simple example of running parallel downloads with Puppeteer.Ĭonst downloadPath = path. The /workspace API allows for users to manually upload and download files that browserless (and thus Chrome) can access. 💡 If you are not familiar with how child process work in Node I highly encourage you to give this article a read. We can combine the child process module with our Puppeteer script and download files in parallel. Basic Usage Take screenshots Generate PDF files Get Inner Text of an Element Inject HTML Evaluate Javascript Wait For Selector Wait For Function Connect. Child process is how Node.js handles parallel programming. The /workspace API allows for users to manually upload and download files that browserless (and thus Chrome) can access. We can fork multiple child_proces in Node. Our CPU cores can run multiple processes at the same time.

💡 Learn more about the single threaded architecture of node here Therefore if we have to download 10 files each 1 gigabyte in size and each requiring about 3 mins to download then with a single process we will have to wait for 10 x 3 = 30 minutes for the task to finish. It can only execute one process at a time. You see Node.js in its core is a single-threaded system.

However, if you have to download multiple large files things start to get complicated. Finally, we will click on the download button. Then we will find the download button on the page.

We will open up a URL in a new browser tab. Click any example below to run it instantly proxy whatsapp-web. Downloading an image by simulating button click In the first example, we will take a look at a simple scenario where we automate a button click to download an image. In this next part, we will dive deep into some of the advanced concepts. Puppeteer Examples and Templates Use this online puppeteer playground to view and fork puppeteer example apps and templates on CodeSandbox.

Puppeteer examples download