How to fix regex Unterminated regular expression literal

Question

I currently have this regex string and i am getting a Unterminated regular expression literal error in my react code

const check_number = /^[0]\d{10}$)|(^[\+]?[234]\d{12}$

does anyone know how to fix this.

You could try /^(?:0|\+?[234]\d\d)\d{10}$/ instead

JvdV
– JvdV

2021-07-14 06:05:42 +00:00
Commented Jul 14, 2021 at 6:05 — JvdV
– JvdV, Commented Jul 14, 2021 at 6:05

Tim Biegeleisen · Accepted Answer · 2021-07-14 04:18:29Z

1

The exact syntax error is being caused by a missing / ending delimiter (and a few other things). But, your regex has other problems. Use this version:

const check_number = /^(?:0\d{10}|[+]?[234]\d{12})$/

The above pattern matches phone numbers which either:

Start with zero and have 11 total digits, or
Start with an optional +, followed by 2, 3, or 4, and have 13 total digits

answered Jul 14, 2021 at 4:18

Tim Biegeleisen

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Alexander Nied · Accepted Answer · 2021-07-14 04:18:58Z

-1

The problem is you have an invalid regular expression, for a number of reasons:

You are missing a closing / character at the end
You have a closing parenthesis in the start with no opening parenthesis
You have an opening parenthesis in the middle with no closing paren

answered Jul 14, 2021 at 4:18

Alexander Nied

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