The most basic inclusion of JavaScript inside your HTML page would look something like this: var x = 3 Īlert( 'hello there, I am JavaScript - x is ' + x) Including your JavaScript inside your HTML document To run JavaScript in console environment, please check out Mozilla Rhino to run JavaScript in server environment, please check node.js. JavaScript does not have to stay inside browsers. We will look at both of these methods inside this section. js extension) and then reference that file inside the HTML document using an empty script element with a src attribute. 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. Other languages like Java and C++ need to be compiled to be executable but JavaScript is executed instantly by a type of program that interprets the code called a parser (pretty much all web browsers contain a JavaScript parser). JavaScript is a text-based language that does not need any conversion before being executed. ![]() ![]() What is JavaScript and how do you execute it? In this article of the Web Standards Curriculum, we will cover the basics of JavaScript - how and where to use it, what problems to avoid, and general basics to get you started on your journey towards becoming a top-notch JavaScript developer. This article provides a basic introduction to coding with JavaScript.
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