Comment by Philip Davis on "How would you structure event handlers in your Redux application that have no effect whatsoever on the Redux store?"

For your use case I wouldn't write a button with a click handler... I'd just use an anchor tag styled to look like a button.

If the filename is coming from Redux then:

 const MyViewComponent = ({ fileUrl }) =>
     <div>
         {/* ...more stuff... */}
         <a href={ fileUrl } target="_blank">Download</a>
     </div>

 const mapStateFromProps = state => ({
     fileUrl: filenameSelector(state)
 })
 export const MyView = connect(mapStateFromProps)(MyViewComponent)

Or if the name of the file is static then you don't need Redux at all.

 <a href="/filename.ext" target="_blank">Download</a>

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