How do we actually debug computer code?

Especially browser-based Javascript code, plz.

Here’s a good one:

• Evaluate and validate XPath/CSS selectors in Chrome Developer Tools

Go ahead. Read the article. You learn to do, in web browser, both:

• XPath -based variable inspection and debugging
• Use XPath to access CSS elements

Debug Javascript in VSCode

What if you’d only like to open a page from VSCode editor? Try this:

• https://kazucocoa.wordpress.com/2019/01/19/jsdebug-using-chrome-dev-tools-via-vscode/

The story behind that original bug?

In 1940s a computer scientist Grace Hopper was working on a Mark II computer, when she noticed very strange behavior. The code was correct, but the machine gave wrong results. They couldn’t understand why that happened. Well..

Guess what was the ultimate finding for the fault?