CODEWITHSUNDEEP
javascriptdownloadbase64
Sergey
Sergey

Reputation: 7692

Download file saved as base64

I need to download files that are saved as base64 string. The file can be of any type.

I've tried to make window.open(prefix + base64); where prefix is a string that JS Reader generates when reading asDataUrl. However, downloading file with prefix data:application/vnd.openxmlformats-officedocument.wordprocessingml.document;base64, resulted in file that has no extension.

What can be done here? (I have to use base64 as a source)

Upvotes: 2

Views: 4619

Answers (1)

Ry-
Ry-

Reputation: 224906

You can make an <a download> in JavaScript and click it to suggest a filename:

document.getElementById('download').onclick = () => {
    const base64 = '';  // …
    const link = document.createElement('a');
    link.href = 'data:application/vnd.openxmlformats-officedocument.wordprocessingml.document;base64,' + base64;
    link.download = 'my-document.docx';
    link.click();
};
<button type="button" id="download">Download</button>

Although I don’t know which browsers don’t recognize that media type as .docx, so maybe they don’t support the download attribute either.

Upvotes: 3

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