1. 旋转的矩形:,``html,,, var canvas = document.getElementById('myCanvas');, var ctx = canvas.getContext('2d');, var angle = 0;,, function draw() {, ctx.clearRect(0, 0, canvas.width,……
1. 示例一:旋转的矩形,``html,,,,,,Your browser does not support the HTML5 canvas tag.,,,var c = document.getElementById("myCanvas");,var ctx = c.getContext("2d");,ctx.fillStyle = "#FF000……