How can I use `javascript save file` functionality to create and save a file with user-provided data?

General Discussions
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If you’re looking for the simplest and most compatible way to implement javascript save file, I’d say go with the good old Blob method combined with an <a> tag. Here’s a quick snippet:

function saveFile(data, filename) {
  const blob = new Blob([data], { type: 'text/plain' });
  const a = document.createElement('a');
  a.href = URL.createObjectURL(blob);
  a.download = filename;
  a.click();
}

:pushpin: Why this works:

  • No external library required
  • Triggers the browser’s download flow
  • Compatible with Chrome, Firefox, Edge, and Safari

It’s my go-to for quick and reliable downloads on the client side.