Javascript Cool Animation

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Javascript Cool Animation

📙Table Of Content

Project Folder Structure:

  • Create a file called  index.html  to serve as the main file.

  • Create a file called  style.css  for the CSS code.
  • Create a file called  script.js  for the JavaScript code.

HTML CODE

  
<!DOCTYPE html>
<html lang="en" >
<head>
  <meta charset="UTF-8">
  <title>Javascript Cool Animation</title>
  

</head>
<body>
<!-- partial:index.partial.html -->

<!-- partial -->
  <script  src="./script.js"></script>

</body>
</html>

Javascript CODE


"use strict"; 
const body=document.getElementsByTagName("body").item(0);
body.style.background="#000";
const TP=2*Math.PI;
const CSIZE=400;

const ctx=(()=>{
  let d=document.createElement("div");
  d.style.textAlign="center";
  body.append(d);
  let c=document.createElement("canvas");
  c.width=c.height=2*CSIZE;
  d.append(c);
  return c.getContext("2d");
})();
ctx.translate(CSIZE,CSIZE);
ctx.lineCap="round";

onresize=()=>{ 
  let D=Math.min(window.innerWidth,window.innerHeight)-40; 
  ctx.canvas.style.width=ctx.canvas.style.height=D+"px";
}

const getRandomInt=(min,max,low)=>{
  if (low) return Math.floor(Math.random()*Math.random()*(max-min))+min;
  else return Math.floor(Math.random()*(max-min))+min;
}

function Color() {
  const CBASE=144;
  const CT=255-CBASE;
  this.getRGB=(ct)=>{
   let red=Math.round(CBASE+CT*(Math.cos(this.RK2+ct/this.RK1)));
   let grn=Math.round(CBASE+CT*(Math.cos(this.GK2+ct/this.GK1)));
   let blu=Math.round(CBASE+CT*(Math.cos(this.BK2+ct/this.BK1)));
    return "rgb("+red+","+grn+","+blu+")";
  }
  this.randomize=()=>{
    this.RK1=360+360*Math.random();
    this.GK1=360+360*Math.random();
    this.BK1=360+360*Math.random();
    this.RK2=TP*Math.random();
    this.GK2=TP*Math.random();
    this.BK2=TP*Math.random();
  }
  this.randomize();
}

var color=new Color();

var stopped=true;
var start=()=>{
  if (stopped) { 
    stopped=false;
    requestAnimationFrame(animate);
  } else {
    stopped=true;
  }
}
body.addEventListener("click", start, false);

var dur=2000;
var tt=getRandomInt(0,1000);
var pause=0;
var trans=false;
var animate=(ts)=>{
  if (stopped) return;
  tt++;
  draw();
  requestAnimationFrame(animate);
}

var KF=Math.random();

var Circle=function() { 
  this.dir=false;
  this.r=80;
  this.randomize=()=>{ 
    this.ka=0; //TP*Math.random();
this.ka2=200;
  }
  this.randomize();
  this.setRA=()=>{
this.a2=TP/4+1.57*(1+Math.sin(tt/this.ka2))/2;
    if (this.dir) this.a2=-this.a2;
  }
  this.setPath2=()=>{
    if (this.p) {
      if (this.cont) {
	this.a=TP/2+this.p.a-this.p.a2;
	this.x=this.p.x+(this.p.r-this.r)*Math.cos(this.p.a-this.p.a2);
	this.y=this.p.y+(this.p.r-this.r)*Math.sin(this.p.a-this.p.a2);
      } else {
	this.a=this.p.a-this.p.a2;
	this.x=this.p.x+(this.p.r+this.r)*Math.cos(this.p.a-this.p.a2);
	this.y=this.p.y+(this.p.r+this.r)*Math.sin(this.p.a-this.p.a2);
      }
    } else {
      this.x=this.r*Math.cos(this.a);
      this.y=this.r*Math.sin(this.a);
    }
    this.path=new Path2D();
    this.path.arc(this.x,this.y,this.r,TP/2+this.a,this.a-this.a2,this.dir);
  }
}

onresize();

var ca=[];
var reset=()=>{
  ca=[new Circle()];
  ca[0].p=false;
  ca[0].a=0; //TP*Math.random();
  ca[0].setRA();
  ca[0].x=ca[0].r*Math.cos(ca[0].a);
  ca[0].y=ca[0].r*Math.sin(ca[0].a);
}
reset();

var addCircle=(c)=>{
  let c2=new Circle();
  c2.a=c.a-c.a2;
  c2.dir=!c.dir;
  c2.p=c;
  c2.cont=false;
  c2.r=c.r*0.8;
if (Math.random()<KF)
c2.ka2=c.ka2*0.8;
  ca.push(c2);
  let c3=new Circle();
  c3.a=TP/2+c.a-c.a2;
  c3.dir=c.dir;
  c3.p=c;
  c3.cont=true;
  c3.r=c.r*0.8;
if (Math.random()<1-KF)
c3.ka2=c.ka2*0.8;
  ca.push(c3);
}

const dmx=new DOMMatrix([-1,0,0,1,0,0]);
const dmy=new DOMMatrix([1,0,0,-1,0,0]);
const dmxy=new DOMMatrix([-1,0,0,-1,0,0]);
//const dmq=new DOMMatrix([0,1,-1,0,0,0]);
const getXYPath=(spath)=>{
  this.level=1;
  let p=new Path2D(spath);
  p.addPath(p,dmxy);
  return p;
}

var draw=()=>{
  ca[0].a=tt/1000;
  for (let i=0; i<ca.length; i++) ca[i].setRA();
  for (let i=0; i<ca.length; i++) ca[i].setPath2();
  let pa=new Array(8);
  for (let i=0; i<pa.length; i++) pa[i]=new Path2D();
  for (let i=0; i<ca.length; i++) {
    if (i==0) pa[0].addPath(ca[i].path);
    else if (i<3) pa[1].addPath(ca[i].path);
    else if (i<7) pa[2].addPath(ca[i].path);
    else if (i<15) pa[3].addPath(ca[i].path);
    else if (i<31) pa[4].addPath(ca[i].path);
    else if (i<63) pa[5].addPath(ca[i].path);
    else if (i<127) pa[6].addPath(ca[i].path);
    else pa[7].addPath(ca[i].path);
  }
  ctx.clearRect(-CSIZE,-CSIZE,2*CSIZE,2*CSIZE);

  for (let i=0; i<pa.length; i++) {
    let pth=getXYPath(pa[i]);
    ctx.strokeStyle=color.getRGB(tt-180*i);
    ctx.lineWidth=Math.max(3, 24-3*i);
    ctx.stroke(pth);
  }
}

for (let i=0; i<127; i++) addCircle(ca[i]);

start();

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How to run this Html Css and Js Project in Our Browser?

first, you need a code editor either you can use VS code studio or notepad and then copy the html,css, and javascript code, create separate or different files for coding then combine them, after creating file just click .html file or run from VS Code studio and you can project preview.

Which Code Editor do you use to create those projects?

I am using VS Code Studio.

is this project responsive or not?

Yes! this project is a responsive project.

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