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JavaScript is easy to learn. This tutorial will teach you JavaScript from basic to advanced. Start learning JavaScript now » Examples in Each Chapter. With our "Try it Yourself" editor, you can edit the source code and view the result. Example. My First JavaScript. Click me to display Date and Time. Try it Yourself » Use the Menu.
JavaScript Introduction. Previous Next . This page contains some examples of what JavaScript can do. 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.
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
JavaScript is the Programming Language for the Web. JavaScript can update and change both HTML and CSS. JavaScript can calculate, manipulate and validate data.
Node.js allows you to run JavaScript on the server. Start learning Node.js now » Learning by Examples. Our "Show Node.js" tool makes it easy to learn Node.js, it shows both the code and the result. Example Get your own Node.js Server. var http = require ('http'); http.createServer(function (req, res) {
Common uses for JavaScript are image manipulation, form validation, and dynamic changes of content. 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":
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
JavaScript supports different kinds of loops: for - loops through a block of code a number of times. for/in - loops through the properties of an object. for/of - loops through the values of an iterable object. while - loops through a block of code while a specified condition is true.
The HTML DOM Tree of Objects. 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 in the page. JavaScript can change all the CSS styles in the page.
Comparison Operators. Comparison operators are used in logical statements to determine equality or difference between variables or values. Given that x = 5, the table below explains the comparison operators: Operator. Description. Comparing. Returns. Try it. ==.
