JS 获取图片Base64
1JS
/*JS 获取图片Base64 function getImageBase64(img, ext) { canvas=document.getElementById('myCanvas'); canvas.width = img.width; canvas.height = img.height; ctx=canvas.getContext('2d'); ctx.drawImage(img, 0, 0, img.width, img.height); //使用画布画图 dataURL = canvas.toDataURL("image/" + ext); //返回的是一串Base64编码的URL并指定格式 canvas = null; //释放 return dataURL; } fileExt='image/png'; var user_icon = document.getElementById('authcode_img');//图片容器 user_icon.src = $("#authcode_img").attr('src'); //指定图片路径 user_icon.onload = function () { base64 = getImageBase64(user_icon, fileExt); //base64编码 console.log('base64:'+base64); } */
2HTML
<canvas id="myCanvas">your browser does not support the canvas tag </canvas> <img id=authcode_img src=https://vip.monxin.com/logo.png />
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