JavaScript is the Programming Language for the Web. JavaScript can update and change both HTML and CSS. JavaScript can calculatemanipulate and validate data

JavaScript is a dynamic computer programming language. It is lightweight and most commonly used as a part of web pages, whose implementations allow client-side script to interact with the user and make dynamic pages. It is an interpreted programming language with object-oriented capabilities.

JavaScript is a very powerful client-side scripting language. JavaScript is used mainly for enhancing the interaction of a user with the webpage.

JavaScript Can Change HTML Content

One of many JavaScript HTML methods is getElementById().

This example uses the method to "find" an HTML element (with id="demo") and changes the element content (innerHTML) to "Hello JavaScript example":

document.getElementById("demo").innerHTML = "Hello JavaScript Example";

The <script> Tag

In HTML, JavaScript code must be inserted between <script> and </script> tags.

document.getElementById("demo").innerHTML = "My First JavaScript";

Note: Old JavaScript examples may use a type attribute: <script type="text/javascript">.
The type attribute is not required. JavaScript is the default scripting language in HTML.



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