Remove all numbers including floats from string with Javascript

Question

I have these strings with numbers

"$12.3"
"12,3 SEK"
"12 pounds"

In all the occurrences i need to remove the number, float or not, and just keep the rest of the string.

"$"
"SEK"
"pounds"

I found several posts that are similar to my question, like this one: Removing Numbers from a String using Javascript

Where something like this is suggested in a comment:

"12.3 USD".replace(/\d+([,.]\d+)?/g)

But that only returns (with the Chrome dev console):

"undefined USD"

A simple lookup of the method replace() would have shown you it takes 2 arguments — charlietfl
– charlietfl, Commented Oct 18, 2017 at 20:16
The problem is, you have no idea what part of non-digits adjacent to numbers are actually part of the number. For example %.7 — user557597
– user557597, Commented Oct 18, 2017 at 20:48

Mike Cluck · Accepted Answer · 2017-10-18 20:08:27Z

7

That's because you aren't telling it what to replace those values with. Try

"12.3 USD".replace(/\d+([,.]\d+)?/g, '')
//   replace with an empty string ---^

It looks like you also want to remove any whitespace coming after the numbers so you could modify your regex a bit to do that.

let result = "12.3 USD".replace(/\d+([,.]\d+)?\s*/g, '');
//                       remove whitespace ---^
console.log(result);

answered Oct 18, 2017 at 20:08

Mike Cluck

32.6k13 gold badges84 silver badges95 bronze badges

Sign up to request clarification or add additional context in comments.

1 Answer 1