I want the following regex to return 16 characters

Question

I have the following code and want to be able to only return 10 characters after the 'LAST='. If there isn't 10 chars then don't return anything.

const value = 'LAST=uirndheusnrm38f6xxxxxxx'
const m = value.match(/LAST=([^\?&]+)/i)

if (m)
{
  console.log('i know it matched LAST= and returned the next 10 chars')
}

Is it possible without doing a substr(0,10) ?

Try `value.match(/LAST=([^?&]{10})$/i)` or `value.match(/LAST=([^?&]{10,})$/i)`. It is not clear: do you want 10 or more? You say you need to return 16 chars in the title, you say 10 in the question body. — Wiktor Stribiżew, Apr 24 '20 at 16:20
Sorry only 10 characters.. I'll try that, thank you. Can't get my head around regex. — i cant code, Apr 24 '20 at 17:49
But 10 chars up to the end of string? Or get 10 chars and then ignore the rest, even if there are 11, 12 chars? — Wiktor Stribiżew, Apr 24 '20 at 17:50
Can you please use clear English? What does "10 only and if there's more or less than 10 return nothing" mean? — Wiktor Stribiżew, Apr 24 '20 at 17:52

score 1 · Answer 1 · answered Apr 24 '20 at 16:25

1

In order to match exactly 10 characters we can use {10}:

const m = value.match(/LAST=([^\?&]{10})/i);

answered Apr 24 '20 at 16:25

Aplet123

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I want the following regex to return 16 characters

1 Answers1