Is there a way in JavaScript to remove everything after last hyphen if its a number?

product-test-grid-2

So Result would be only:

product-test-grid

Trying to use this resource:

Remove everything after a certain character

Is there a way in JavaScript to remove everything after last hyphen if its a number?

product-test-grid-2

So Result would be only:

product-test-grid

Trying to use this resource:

Remove everything after a certain character

• javascript

• words=sentence.split("-"); if(words[words.length-1].match(/^\d+$/)) words.pop(); result=words.join("-"); – iAmOren Commented Oct 28, 2020 at 20:40
• @alansmith4785 run the code in my answer for a pure JS working solution – Metabolic Commented Oct 28, 2020 at 21:00

5 Answers 5

You can use a simple regular expression with replace.

eg..

/-\d+$/ = a dash followed by 1 or more numbers \d+, that's at the end $

const reLast = /-\d+$/;
const test1 = 'product-test-grid-2';
const test2 = 'product-test-grid-nan';

console.log(test1.replace(reLast, ''));
console.log(test2.replace(reLast, ''));

Simple JS, No regex involved

const label = 'product-test-grid-2'.split('-');
!isNaN(+label[label.length - 1]) ? label.pop() : '';
console.log(label.join('-'));


// you can encapsulate it into function
function formatLabel(label) {
  label = label.split('-');
  !isNaN(+label[label.length - 1]) ? label.pop() : '';
  return label.join('-');
}


// 2 should be removed at the end
console.log(formatLabel('product-test-grid-2'));

// two should be left untouched
console.log(formatLabel('product-test-grid-two'));

'product-test-grid-2'.replace(/(?<=-)\d*$/, '') will preserve the last hyphen.

'product-test-grid-2'.replace(/-\d*$/, '') will remove it.

Split by "-", check if last item is a number: pop if it is, join with "-":

sentence="product-test-grid-2";
words=sentence.split("-");
if(words[words.length-1].match(/^\d+$/)) words.pop();
result=words.join("-");
console.log(result);

You can do this with regrx but it seems to me Overkill

I would do that

    const str='product-test-grid-2'
    const pos=str.lastIndexOf('-')
    const res=str.slice(0,pos)
    console.log(res)