Complete JavaScript and HTML DOM References All Properties and Methods with Full Examples Revised April 2024

To select an HTML element, JavaScript most often uses the document.getElementById() method. This JavaScript example writes "Hello JavaScript!" into an HTML element with id="demo":

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W3Schools maintains a complete JavaScript reference, including all HTML and browser objects. The reference contains examples for all properties, methods and events, and is continuously …

If you want to run the same JavaScript on several pages in a web site, you should create an external JavaScript file, instead of writing the same script over and over again. Save the script …

Finding HTML Elements. Often, with JavaScript, you want to manipulate HTML elements. To do so, you have to find the elements first. There are several ways to do this: Finding HTML …

With the object model, JavaScript gets all the power it needs to create dynamic HTML: JavaScript can change all the HTML elements in the page; JavaScript can change all the HTML attributes …

A JavaScript function is a block of JavaScript code, that can be executed when "called" for. For example, a function can be called when an event occurs, like when the user clicks a button. …

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Examples of using JavaScript to access and manipulate HTML input objects. Button Object Disable a button Find the name of a button Find the type of a button Find the value of a button …