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Res Attachment

_includes/api/en/3x/res-attachment.md

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<h3 id='res.attachment'>res.attachment([filename])</h3>

Sets the Content-Disposition header field to "attachment". If a filename is given then the Content-Type will be automatically set based on the extname via res.type(), and the Content-Disposition's "filename=" parameter will be set.

js
res.attachment()
// Content-Disposition: attachment

res.attachment('path/to/logo.png')
// Content-Disposition: attachment; filename="logo.png"
// Content-Type: image/png