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How can I validate if the user has selected a file to upload?
Edit: bumped
314
length property in jQuery to check the file is selected or not. If element. files. length property returns 0 then the file is not selected otherwise file is selected.
Using JavaScript, you can easily check the selected file extension with allowed file extensions and can restrict the user to upload only the allowed file types. For this we will use fileValidation() function. We will create fileValidation() function that contains the complete file type validation code.
No need of JavaScript validation you can use "required" attribute in input type.... The HTML5 required attribute marks any input/textarea as being required to have a value before the form can be submitted.
Check it's value property:
In jQuery (since your tag mentions it):
$('#fileInput').val() Or in vanilla JavaScript:
document.getElementById('myFileInput').value If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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