JavaScript is very important on the web. We explain what is JavaScript Programming Language and how it works on a website.

Asynchronous programming in JavaScript leverages features like callbacks, promises and async/await to sidestep this issue by allowing other code to run in the meantime.

Start with the "Complete Introduction to JavaScript" course to find out how JavaScript works. You'll be creating exciting interactive content before this first course is over. Follow that up with ...

Google’s John Mueller predicts technical SEOs will run into more JavaScript in the coming years than they’ve encountered so far.