How to check if string has only alpha characters and one space (Javascript)

Question

I found a way to check if a string has only one space between whatever characters.

if (/^[^ ]* [^ ]*$/.test(name))

But I want the string to contain only alpha characters between one space. I'm new to regex so I'm not sure how to do this.

I tried this but it doesn't seem to work:

if (/^[a-z ]* [a-z ]*$/i.test(name))

"John Smith" should work but something like "John W Smith" or "111 111" should not work.

I found regexr.com to be very helpful in writing regexes

Esger
– Esger

2020-10-02 14:30:10 +00:00
Commented Oct 2, 2020 at 14:30 — Esger
– Esger, Commented Oct 2, 2020 at 14:30
Try: /[a-z]*\s[a-z]*$/ - removed some spaces.

DigitShifter
– DigitShifter

2020-10-02 15:25:59 +00:00
Commented Oct 2, 2020 at 15:25 — DigitShifter
– DigitShifter, Commented Oct 2, 2020 at 15:25

flipjacob · Accepted Answer · 2020-10-02 14:30:21Z

2

/^[a-zA-Z]* [a-zA-Z]*$/

where [a-zA-Z]* matches 0 or more (*) alphabetic characters (a-z) case insensitively (a-zA-Z). Mind that the only space is between the two capturing groups, because it needs to be matched literally. I would really recommend using https://regex101.com/ for testing your regular expressions, it saved me a lot of time.

answered Oct 2, 2020 at 14:30

flipjacob

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