Example of how to use JavaScript + canvas to implement the seven color palette and canvas 7 color palette

Example of how to use JavaScript + canvas to implement the seven color palette and canvas 7 color palette

The example in this article describes how to implement a seven-color palette using JavaScript + canvas. We will share this with you for your reference. The details are as follows:

As follows:

Html:

<canvas id="canvas" class="canvas" width="600" height="600"></canvas>

Css:

html,body{margin: 0;padding: 0}.canvas{display: block; margin-left:auto;margin-right:auto;margin-top: 50px;}

Javascript:

var disk = [    {      area:[{x:0,y:0},{x:600,y:0},{x:300,y:300}],      color:"#CBF263"    },    {      area:[{x:0,y:0},{x:0,y:600},{x:300,y:300}],      color:"#5CB6D0"    },    {      area:[{x:0,y:600},{x:300,y:600},{x:150,y:450}],      color:"#FE9CCD"    },    {      area:[{x:150,y:450},{x:300,y:300},{x:450,y:450},{x:300,y:600}],      color:"#A696C3"    },    {      area:[{x:300,y:600},{x:600,y:600},{x:600,y:300}],      color:"#FBC421"    },    {      area:[{x:600,y:300},{x:600,y:0},{x:450,y:150},{x:450,y:450}],      color:"#FF5061"    },    {      area:[{x:450,y:450},{x:450,y:150},{x:300,y:300}],      color:"#FDEA11"    }]window.onload = function(){    var canvasDom = document.getElementById("canvas");    var ctx = canvasDom.getContext("2d");    drawDisk(disk,ctx)}function drawDisk(disk,ctx){    for(var i = 0;i<disk.length;i++){      ctx.beginPath();      ctx.moveTo(disk[i].area[0].x,disk[i].area[0].y);      for(var j = 1;j<disk[i]["area"].length;j++){        ctx.lineTo(disk[i].area[j].x,disk[i].area[j].y);      }      ctx.closePath();      ctx.fillStyle = disk[i]["color"];      ctx.fill();    }}