How Can I Download a File Using JavaScript or jQuery Without Reloading the Page?

Download a File Using JavaScript/jQuery Without Replacing Page Contents

When the user clicks on a hyperlink, it typically opens the corresponding content within the current web page. However, there are scenarios where you need to manually trigger a file download without replacing the page's content.

To achieve this, you can utilize two main approaches:

1. Using an Invisible iFrame:

Create an invisible iframe element in your HTML:

<iframe></iframe>

Then, use JavaScript to set the iframe's "src" attribute to the file URL:

function Download(url) {
  document.getElementById('my_iframe').src = url;
}

To prevent the browser from interpreting certain files (e.g., HTML, text) as web pages and force them to be downloaded, you may need to set their MIME type to "application/x-please-download-me" or "application/octet-stream" on the server side.

2. Opening the File in a New Tab:

To open the download in a new tab, you can modify the hyperlink's target attribute:

<a href="file.pdf" target="_blank">Download</a>

Alternatively, use jQuery to dynamically set the target attribute:

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

When the user clicks on the hyperlink, the target attribute ensures that the file is downloaded in a new tab or window.

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