How can I run JavaScript code?

To execute JavaScript in a browser you have two options — either put it inside a script element anywhere inside an HTML document , or put it inside an external JavaScript file (with a . js extension) and then reference that file inside the HTML document using an empty script element with a src attribute.

10 Websites to Test Your Codes Online

With our online JavaScript editor , you can edit HTML, CSS and JavaScript code, and view the result in your browser.

Javascript Online Compiler Write, Run & Share Javascript code online using OneCompiler’s JS online compiler for free. It’s one of the robust, feature-rich online compilers for Javascript language. Getting started with the OneCompiler’s Javascript editor is easy and fast.