Regex for decimal prices with or without spaces-CodePudding

I have a problem with my price regex which I'm trying to change. I want it to allow numbers like:

For now I have something like this, but it won't accept numbers without spaces.

'^\d{1,3}( \d{3}){0,10}[,]*[.]*([0-9]{0,2'})?$'

I tried changing ( \d{3}) to (\s{0,1}\d{3}) but it still doesn't work :(

CodePudding user response：

Try this RegEx : ^[(0-9),\s]*$

const str = '2 122,00';

console.log(/^[(0-9),\s]*$/.test(str))

CodePudding user response：

All problems are easier if you break them into pieces.

First we have to match the non decimal
1
100
1 000
10 000 000

The first grouping is 1 to 3 digits or \d{1,3}
We still need to account for the following groups which may or may not be there. That in regex is a * or 0 or many \d{1,3}(\s\d{3})* in that second part we put a space in front of the set to it now looks for spaces between groups of 3.
To complete this set we add in a \d for a flat block of numbers
Last we have to match the decimal, optionally ?. ^(\d{1,3}(\s\d{3})*|\d )(,\d )?$

  /^(\d{1,3}(\s\d{3})*|\d )(,\d )?$/.test(str)