Question

Internet explorer is generating this error for the code that follows:

SCRIPT5007: Unable to get value of the property '0': object is null or undefined
for "document.getElementById('files').files[0]“

It’s correct that …files[0] is null, but I don’t care, how can I tell IE not to care?

Thanks

Answer 1

var elem = document.getElementById('files'),
    file = elem.files && elem.files[0];

This will short-circuit and return undefined if files is undefined, otherwise it will return the first file.

Point of clarification, the error indicates that files is the undefined variable and accessing the property 0 is causing an error. If it were files[0] itself, the expression would just return undefined.