js 圖片base64轉file文件的兩種方式

js 圖片base64轉file文件的兩種方式

https://blog.csdn.net/yin13037173186/article/details/83302628

//將base64轉換爲blob
    dataURLtoBlob: function(dataurl) { 
        var arr = dataurl.split(','),
            mime = arr[0].match(/:(.*?);/)[1],
            bstr = atob(arr[1]),
            n = bstr.length,
            u8arr = new Uint8Array(n);
        while (n--) {
            u8arr[n] = bstr.charCodeAt(n);
        }
        return new Blob([u8arr], { type: mime });
    },
    //將blob轉換爲file
    blobToFile: function(theBlob, fileName){
       theBlob.lastModifiedDate = new Date();
       theBlob.name = fileName;
       return theBlob;
    },
    //調用
    var blob = dataURLtoBlob(base64Data);
    var file = blobToFile(blob, imgName);