图片base64与blob互转

Posted 2022-12-14 水月情缘雪飞飞

<script>
/**
* base64 转 blob 对象，文件上传
 * 转载自：http://blog.csdn.net/hsany330/article/details/52575459
 * @param dataURI
 * @returns Blob
 */
function dataURItoBlob(dataURI) 
    var byteString = atob(dataURI.split(',')[1]);
    var mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0];
    var ab = new ArrayBuffer(byteString.length);
    var ia = new Uint8Array(ab);
    for (var i = 0; i < byteString.length; i++) 
        ia[i] = byteString.charCodeAt(i);
    
    return new Blob([ab], type: mimeString);

</script>