CSS代码:
canvas { border: 1px solid #beceeb; background-color: #f0f3f9;}
HTML代码:
<canvas id="canvas"></canvas>
JS代码:
(function() {
if (isNaN(window.screenX)) return;
var canvas = document.querySelector("#canvas")
, context = canvas.getContext("2d");
// 添加文字
context.save();
context.font = "30px 微软雅黑";
context.textAlign = "center";
context.fillText("点击生成新图片", 150, 85);
context.restore();
// 点击事件
canvas.addEventListener("click", function() {
this.toBlob && this.toBlob(function(blob) {
var newImg = document.createElement("img"),
url = URL.createObjectURL(blob);
newImg.onload = function() {
// 移除
URL.revokeObjectURL(url);
};
newImg.src = url;
document.querySelector(".demo").appendChild(newImg);
});
});
})();