JavaScript HTML DOM Animation
Learn to create HTML animations using JavaScript.
A Basic Web Page
To demonstrate how to create HTML animations with JavaScript, we will use a simple
web page:
Example
<!DOCTYPE html><html><body><h1>My First
JavaScript Animation</h1>
<div id="animation">My animation will go here</div>
</body></html>
Create an Animation Container
All animations should be relative to a container element.
Example
<div id ="container"> <div id ="animate">My
animation will go here</div></div>
Style the Elements
The container element should be created with style = "position: relative".
The animation element should be created with style = "position: absolute".
Example
#container { width: 400px; height:
400px; position: relative;
background: yellow;
}#animate { width: 50px; height:
50px; position: absolute;
background: red;}
Try it Yourself »
Animation Code
JavaScript animations are done by programming gradual changes in an element's
style.
The changes are called by a timer. When the timer interval is small, the
animation looks continuous.
The basic code is:
Example
id = setInterval(frame, 5);function frame() { if (/*
test for finished */) { clearInterval(id); } else {
/* code to change the element style */ }}
Create the Full Animation Using JavaScript
Example
function myMove() {
let id = null;
const elem = document.getElementById("animate");
let pos = 0;
clearInterval(id); id = setInterval(frame, 5);
function frame() { if (pos ==
350) {
clearInterval(id); } else {
pos++; elem.style.top = pos + 'px'; elem.style.left = pos + 'px';
} }}
Try it Yourself »
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Reference: https://www.w3schools.com/js/js_htmldom_animate.asp
JavaScript HTML DOM Animation
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 is the programming language of the Web.
JavaScript is easy to learn.
This tutorial will teach you JavaScript from basic to advanced.