JavaScript Strings The startsWith() Method Check if a string starts with "Hello": The startsWith() method is not supported in Internet Explorer. let text = "Hello world, welcome to the universe."; document.getElementById("demo").innerHTML = text.startsWith("Hello"); ...
JavaScript Dates The setUTCHours() Method setUTCHours() method sets the hour (according to UTC) of a date object. const d = new Date("2025-01-15"); d.setUTCHours(15); document.getElementById("demo").innerHTML = d; ...
Whether you're looking to learn HTML, CSS, JavaScript, or any other web technology, W3Schools provides comprehensive tutorials and examples that make learning a breeze. The step-by-step approach and interactive code editors allow you to practice what you learn in real-time, which significantly ...
JavaScript async / await Wait 3 seconds (3000 milliseconds) for this page to change. async function myDisplay() { let myPromise = new Promise(function(resolve) { setTimeout(function() {resolve("I love You !!");}, 3000); }); document.getElementById("demo").innerHTML =...
Change padding-left with JavaScript Click the "Try it" button to change the padding-left property of the DIV element: Try it Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat......
Creating a JavaScript Object: const person = {firstName:"John", lastName:"Doe", age:50,eyeColor:"blue"}; document.getElementById("demo").innerHTML = person.firstName + " is " + person.age + " years old."; ...
alert("Hello " + fname + "! You will now be redirected to www.w3Schools.com"); } JavaScript HTML Events The onsubmit Attribute Enter your name:
JavaScript Statements A JavaScript program is a list of statements to be executed by a computer. let x, y, z; // Statement 1 x = 5; // Statement 2 y = 6; // Statement 3 z = x + y; // Statement 4 document.getElementById("demo").innerHTML = "The val...
JavaScript String Methods Try to replace "Microsoft" with "W3Schools" in the paragraph below: Try it Please visit Microsoft! function myFunction() { let text = document.getElementById("demo").innerHTML; document.getElementById("demo").innerHTML = text.replace("MICROSOFT",...
JavaScript Strings The toString() Method toString() returns the content of a string object: let text = new String("Hello World!"); let result = text.toString(); document.getElementById("demo").innerHTML = result; ...