圖片文件轉base64,利用canvas
// 圖片文件轉base64,利用canvas
function getBase64Image(img) {
var canvas = document.createElement("canvas");
canvas.width = img.width;
canvas.height = img.height;
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0, img.width, img.height);
var ext = img.src.substring(img.src.lastIndexOf(".")+1).toLowerCase();
var dataURL = canvas.toDataURL("image/"+ext);
return dataURL;
}
// 使用
var image = new Image();
image.src = "imgurl"; //imgurl 就是你的圖片路徑
image.onload = function(){
var imgBase64 = getBase64Image(image);
console.log(imgBase64);
}