How to check file extension in Javascript? [duplicate]

Question

I want to check the file's capacity and extension.

<input type="file" id="fileup['+idx+']"> 
<input type="button" onclick="fileSizeCheck(idx)">

When I have this code, how do I check the extension when adding files and checking the capacity?

sxzhao · Accepted Answer · 2017-11-28 05:31:09Z

1

You will need to get the file by adding an onchange event handler to the file input. Maybe save that to a variable and then use it in the onclick handler

answered Nov 28, 2017 at 5:31

sxzhao

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