如何在不打開瀏覽器的情況下下載pdf文件

Question

這段代碼我正在嘗試，但沒有任何錯誤，它沒有顯示任何東西給我。

if (!window.ActiveXObject) { 
    var save = document.createElement('a'); 
    save.href = fileURL; 
    save.target = '_blank'; 
    save.download = fileName || 'unknown'; 

    var event = document.createEvent('Event'); 
    event.initEvent('click', true, true); 
    save.dispatchEvent(event); 
    (window.URL || window.webkitURL).revokeObjectURL(save.href); 
} 

// for IE 
else if (!! window.ActiveXObject && document.execCommand)  { 
    var _window = window.open(fileURL, '_blank'); 
    _window.document.close(); 
    _window.document.execCommand('SaveAs', true, fileName || fileURL) 
    _window.close(); 
} 

這不是爲我工作

Answer 1

嘗試追加save元素使用.appendChild()document.body調用event.initEvent('click', true, true)之前，save.dispatchEvent(event)

var fileURL = "data:text/plain,abc", fileName = "file.txt"; 
 

 
if (!window.ActiveXObject) { 
 
    var save = document.createElement('a'); 
 
    save.href = fileURL; 
 
    save.target = '_blank'; 
 
    save.download = fileName || 'unknown'; 
 
    var event = document.createEvent('Event'); 
 
    // append `a` element : `save` to `document.body` here 
 
    document.body.appendChild(save); 
 
    event.initEvent('click', true, true); 
 
    save.dispatchEvent(event); 
 
    // (window.URL || window.webkitURL).revokeObjectURL(save.href); 
 
}