js 文件各种转换

blobURL2blob

/**
 * blobURL2blob
 * @param blobURL
 * @returns {Promise<any>}
 */
export function blobURL2blob(blobURL){
    return new Promise((resolve, reject) => {
        var xhr = new XMLHttpRequest();
        xhr.open('GET', blobURL, true);
        xhr.responseType = 'blob';
        xhr.onload = function(e) {
            if (this.status == 200) {
                resolve(this.response);
                // var myBlob = this.response;
                // // myBlob is now the blob that the object URL pointed to.
            }else{
                reject(this)
            }
        };
        xhr.onerror = reject;
        xhr.send();
    })

}