In this quick tutorial, I’ll show you how to upload a file from a web browser, with a Node.js file upload handler on the server-side, and a pure, Ajax based JavaScript process on the client side. Step ...

JavaScript has made it more complicated, in that it can add, remove or change different elements. Looking at the source code is not enough; you need to check the rendered HTML instead.

For example, TikTok can monitor all keyboard inputs and screen taps when you open a URL using the in-app browser. Meanwhile, Instagram can even detect all text selections on websites.