March 2021
Intermediate to advanced
316 pages
6h 24m
English
Content preview from UI Testing with Puppeteer
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Chapter 6: Executing and Injecting JavaScript
In the past few chapters, we learned about most of the basic Puppeteer features, from creating a browser and a page correctly, to finding elements and interacting with them.
Now it's time to get into more powerful tools. In this chapter, we will see how Puppeteer gives us the ability to execute JavaScript code in the browser.
It might sound like a hack or a last resort tool. Sometimes it is. But it is also a tool that will help us perform actions that are not provided by the Puppeteer API.
The communication between the code being executed on the Node side and the code being executed in the browser can sometimes be tricky. We will learn how to communicate with both sides efficiently.
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.