html2canvas

在使用html2canvas时，执行转换时不得出现父辈元素（上级 、上上级）等，有display:none 属性，否则报错。 生成时如果出现提示图片跨域，在图片地址上加上 时间戳 （ new Date().getTime() ） 及属性 crossOrigin="anonymous" 来源： https://my.oschina.net/u/3757195/blog/3137161

1.截出来的图会有白边 看了很多代码，感觉有点麻烦，后来灵机一动，直接把画布缩小了一点，白边就直接不显示了，不过这个方法比较投机 $("#save").click(function() { var width = $('.box').width() - 1; //截出来图片有白边，把画布减少一点， var height = $('.box').height() - 1; html2canvas($('.box')[0], { width: width, height: height, useCORS: true, //跨域图片 }).then(function(canvas) { var img = new Image() img.src = canvas.toDataURL('image/jpeg') img.style.cssText = 'position:absolute;width:70%;left:15%;top:4%;z-index:9999;' $('.mask2').append(img) console.log("生成图片了") }) 2.微信头像截图时好时坏，截出的文字有些会有偏移 一开始以为是跨域图片的问题，搞了挺久，后来网上看到说这个插件 对flex的布局兼容比较差，并且最好不要用rem来设置字体，后来试了一下，果然是flex布局的问题

问题描述 两张图片，一张是用户上传的图片，另一张是模板图，中间是透明的，可以制作相框，并保存。使用html2canvas对两个img标签进行截图。在写demo的时候html2canvas没有报错但是所截的是空白，若换成文字就可以。 原因分析 找了半天才知道，如果截图部分包含图片的话，程序必须放在服务器下面进行，不然的话就是空图片。 It will not work if you run this html file without any web server . If you are playing around on your PC then install XAMPP or any other web server (Easiest option http://www.apachefriends.org/en/xampp.html ) and put the image ,JavaScript and HTML code in C:\xampp\htdocs (if C dirive is your installation drive) and run using the server. I have tested it in Chrome and its working. 参考链接： http://stackoverflow.com/questions/14004607

Using HTML2Canvas I'm trying to take a capture of a googleMap (Which works fine) then take a capture of an #overlay div that is over the top of it (Which is there to allow people to place images over the googleMap in specific places)(Works fine). The page then displays both of these canvas elements on the page which I then want to take another capture of to combine the 2 canvases together into a single image that they can then download. The issue I'm having so far is that it seems HTML2Canvas isn't picking up the canvas elements that it creates when I try and capture my #preview div. HTML:

i'm trying encode the document generated in the attached code, but nothing happens, not generate error but neither encodes the file, and the ajax request is never executed what is the correct way? html2canvas(document.getElementById("workAreaModel"), { onrendered: function(canvas) { var img = canvas.toDataURL("image/png"); var doc = new jsPDF("l", "pt", "letter"); doc.addImage(img, 'JPEG',20,20); var fileEncode = btoa(doc.output()); $.ajax({ url: '/model/send', data: fileEncode, dataType: 'text', processData: false, contentType: false, type: 'GET', success: function (response) { alter('Exit to

I have a task where i need to load a URL (e.g www.yahoo.com) , on my webpage, and take screenshot. I am using html2canvas for screenshot and appending it to the body of the page. The page specified by the URL is successfully loaded in an iframe inside a div element. But when i try to take screenshot of that, the iframe area comes blank. Below is the code for previewURL and screenshot . //to preview the URL content function previewUrl(url,target){ //use timeout coz mousehover fires several times clearTimeout(window.ht); window.ht = setTimeout(function(){ var div = document.getElementById(target

一、引用库 html2canvas.js和canvas2image.js的下载地址： html2canvas.js: http://html2canvas.hertzen.com/dist/html2canvas.min.js canvas2image.js: https://github.com/SuperAL/canvas2image/blob/master/canvas2image.js 二、使用 需要已引入jQ库。如果浏览器没有引入，可以自行引入 http://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js 同步写法 function save_html_as_png(filename = 'image') { var opts = { //scale: scale, // 添加的scale 参数 //canvas: canvas, //自定义 canvas //logging: false, //日志开关，便于查看html2canvas的内部执行流程 //width: width, //dom 原始宽度 //height: height, useCORS: true // 【重要】开启跨域配置 }; html2canvas($('body')[0], opts).then(canvas => { /