<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>htmltopic</title> <script src="https://cdn.bootcss.com/jquery/2.0.2/jquery.min.js"></script> <script src="https://cdn.bootcss.com/html2canvas/0.5.0-beta4/html2canvas.js"></script> <style> * { margin: 0; } .test { width: 100px; height: 100px; text-align: center; line-height: 100px; background-color: #87CEEB; display: inline-block; vertical-align: top; } .test img{ width: 100%; } </style> </head> <body> <div class="test">测试</div> <script> //直接选择要截图的dom,就能截图,但是因为canvas的原因,生成的图片模糊 //html2canvas(document.querySelector('div')).then(function(canvas) { // document.body.appendChild(canvas); //}); //创建一个新的canvas var canvas2 = document.createElement("canvas"); let _canvas = document.querySelector('div'); var w = parseInt(window.getComputedStyle(_canvas).width); var h = parseInt(window.getComputedStyle(_canvas).height); //将canvas画布放大若干倍,然后盛放在较小的容器内,就显得不模糊了 canvas2.width = w * 2; canvas2.height = h * 2; canvas2.style.width = w + "px"; canvas2.style.height = h + "px"; var context = canvas2.getContext("2d"); context.scale(2, 2); html2canvas(document.querySelector('div'), { canvas: canvas2 }).then(function(canvas) { //document.body.appendChild(canvas); //canvas转换成url,然后利用a标签的download属性,直接下载,绕过上传服务器再下载 console.log(222); $('.test').html('<img src="' + canvas.toDataURL() + '" />'); }); //这是另一种写法 // $(function () { // html2canvas($(".test")).then(function (canvas) { // var imgUri = canvas.toDataURL("image/png").replace("image/png", "image/octet-stream"); // 获取生成的图片的url // console.log(imgUri); // $('.test').html('<img src="' + imgUri + '" />'); // }); // }); </script> </body> </html>
Js实现将html页面或div生成图片
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