JavaScript is the world's most popular programming language.

JavaScript is the programming language of the Web.

JavaScript is easy to learn.

This tutorial will teach you JavaScript from basic to advanced.

JavaScript Can Change HTML Content​

One of many JavaScript HTML methods is getElementById().

The example below "finds" an HTML element (with id="demo"), and changes the element content (innerHTML) to "Hello JavaScript":

Example​

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

JavaScript Can Change HTML Styles (CSS)​

Changing the style of an HTML element, is a variant of changing an HTML attribute:

Example​

document.getElementById("demo").style.fontSize = "35px";

JavaScript Can Hide HTML Elements​

Hiding HTML elements can be done by changing the display style:

Example​

document.getElementById("demo").style.display = "none";

JavaScript Can Show HTML Elements​

Showing hidden HTML elements can also be done by changing the display style:

Example​

document.getElementById("demo").style.display = "block";


Thank You For Learning!