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Download File Using Javascript/jQuery


Question

I have a very similar requirement specified here.

I need to have the user's browser start a download manually when $('a#someID').click();

But I cannot use the window.href method, since it replaces the current page contents with the file you're trying to download.

Instead I want to open the download in new window/tab. How is this possible?

2017/05/23
1
369
5/23/2017 12:26:42 PM

Accepted Answer

Use an invisible <iframe>:

<iframe id="my_iframe" style="display:none;"></iframe>
<script>
function Download(url) {
    document.getElementById('my_iframe').src = url;
};
</script>

To force the browser to download a file it would otherwise be capable of rendering (such as HTML or text files), you need the server to set the file's MIME Type to a nonsensical value, such as application/x-please-download-me or alternatively application/octet-stream, which is used for arbitrary binary data.

If you only want to open it in a new tab, the only way to do this is for the user to a click on a link with its target attribute set to _blank.

In jQuery:

$('a#someID').attr({target: '_blank', 
                    href  : 'http://localhost/directory/file.pdf'});

Whenever that link is clicked, it will download the file in a new tab/window.

2015/12/02
386
12/2/2015 9:38:15 PM


function downloadURI(uri, name) 
{
    var link = document.createElement("a");
    // If you don't know the name or want to use
    // the webserver default set name = ''
    link.setAttribute('download', name);
    link.href = uri;
    document.body.appendChild(link);
    link.click();
    link.remove();
}

Check if your target browser(s) will run the above snippet smoothly:
http://caniuse.com/#feat=download

2020/06/01

I'm surprised not a lot of people know about the download attribute for a elements. Please help spread the word about it! You can have a hidden html link, and fake a click on it. If the html link has the download attribute it downloads the file, not views it, no matter what. Here's the code. It will download a cat picture if it can find it.

document.getElementById('download').click();
<a href="https://docs.google.com/uc?id=0B0jH18Lft7ypSmRjdWg1c082Y2M" download id="download" hidden></a>

Note: This is not supported on all browsers: http://www.w3schools.com/tags/att_a_download.asp

2015/07/07

I recommend using the download attribute for download instead of jQuery:

<a href="your_link" download> file_name </a>

This will download your file, without opening it.

2020/01/15

If you are already using jQuery, you could take adventage of it to produce a smaller snippet
A jQuery version of Andrew's answer:

var $idown;  // Keep it outside of the function, so it's initialized once.
downloadURL : function(url) {
  if ($idown) {
    $idown.attr('src',url);
  } else {
    $idown = $('<iframe>', { id:'idown', src:url }).hide().appendTo('body');
  }
},
//... How to use it:
downloadURL('http://whatever.com/file.pdf');
2012/10/14

Works on Chrome, Firefox and IE8 and above.

var link=document.createElement('a');
document.body.appendChild(link);
link.href=url ;
link.click();
2016/05/04

Source: https://stackoverflow.com/questions/3749231
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