IE 11未能創建從字節數組文件對象角2

Question

誰能告訴我，爲什麼IE11在最後一行拋出錯誤 -

this.document = this.control.value; 
    const bytes = 
this.documentService.base64toBytes(this.document.documentBlob.documentData, 
     this.document.documentDataFormat); 
const file = new File(bytes, this.document.documentName, { type: 
     this.document.documentDataFormat }); 

這在Chrome和Firefox.IE工作拋出對象錯誤 -

Object doesn't support this action. 

Answer 1

由於IE不支持File API的構造函數，所以我想出了以下解決方法。希望這有助於他人在未來的 -

const bytes = this.documentService.base64toBytes(this.document.documentBlob.documentData, this.document.documentDataFormat); 
let file: File; 
try { 
    file = new File(bytes, this.document.documentName, { type: this.document.documentDataFormat }); 

    if (this.uploader.isFile(file)) { 
    this.uploader.addToQueue([file]); 
    } 
} catch (err) { // Workaround for IE 11 
    const blob = this.documentService.base64ToBlob(this.document.documentBlob.documentData, 
    this.document.documentDataFormat); 
    file = this.documentService.blobToFile(blob, this.document.documentName); 
    this.uploader.addToQueue([file]);