使用遠程時候警惕跨域問題
            When using to preview the remote files, please be careful of the CORS.

            如果是上傳文件預覽,直接點上傳就好;如果是遠程預覽,請在輸入框中輸入docx文件地址,失去焦點後會自動轉化
            If you want to preview the docx file after you have uploaded the file, just uploading the file.
            If you want to preview a remote docx file, please input the url of the docx file in the input dialog, after losing focus, the remote file can be converted.