jsFiddle is the perfect solution; it provides a custom environment (based on user selections) to test (or fiddle with) your JavaScript, HTML, and CSS ... code in the appropriate areas of the page.

Visual Studio Code 1.66, also identified as the March 2022 release of the code editor, has just been published by Microsoft. The new release brings improvements to JavaScript heap profiles ...

New Vision support with GitHub Copilot in the latest Visual Studio Code Insiders build takes a user-supplied mockup image and creates a web page from it in seconds, handling all the HTML and CSS.