How to remove suffix from string?

Question

How can I remove the following suffix:

1. px
2. %
3. em

from some string if it contains that suffix ?
Like enter I get string which can be measure of width of div and that can ends with 'px', '%', 'em' and can also be without, so I need to remove suffix if it exists.

Answer 1

var s = "34em";
parseInt(s, 10); // returns 34

this works for em, px, %, pt... and any other suffix even if it has a space before.

Use parseFloat() instead if you have non-integer values

var s = "81.56%";
parseFloat(s); // returns 81.56