Do you need to perform an Ajax file upload with pure JavaScript? This example lays out the steps to accomplish an Ajax file upload without the need for a JavaScript library like jQuery or Dojo.

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.