Home > Article > Web Front-end > JavaScript+canvas realizes the seven-color board effect example_javascript skills
The example in this article describes how JavaScript+canvas achieves the seven-color board effect. Share it with everyone for your reference, the details are as follows:
The rendering is 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(); } }
Readers who are interested in more JavaScript-related content can check out the special topics on this site: "Summary of JavaScript animation special effects and techniques", "Summary of JavaScript expansion techniques", "Summary of JavaScript motion effects and techniques", "Summary of JavaScript mathematical operation usage" and "Javascript object-oriented introductory tutorial"
I hope this article will be helpful to everyone in JavaScript programming.