Regex for containig at least one latin character

Question

i'm having a regex that is allowing only Latin letters and numbers and allows the symbols @, _ and .. The final requirement is that it must contain at least one Latin letter.

My regex is this:

const regTest = /^([0-9A-Za-z_@.])+$/g;

Step 1: remove the `g` flag. – melpomene Jun 26 '18 at 11:57 — melpomene, Jun 26 '18 at 11:57

score 2 · Accepted Answer · answered Jun 26 '18 at 11:58

2

You can try with following regex:

/^[0-9a-z_@.]*[a-z][0-9a-z_@.]*$/i

answered Jun 26 '18 at 11:58

hsz

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I'd go with `/^[\d_@.]*[a-z][\w@.]*$/i` – revo Jun 26 '18 at 12:06

score 2 · Answer 2 · edited Jun 20 '20 at 09:12

2

You may also try with the usage of positive lookahead:

^(?=.*[a-z])[\w@\.]*$

Use with ignore case flag.

Demo

edited Jun 20 '20 at 09:12

Community

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answered Jun 26 '18 at 12:12

NeverHopeless

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You put a `+` in character class but it shouldn't be there. – revo Jun 26 '18 at 12:15
Oh missed that, thanks. – NeverHopeless Jun 26 '18 at 12:16
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Upvoted and to avoid backtracks you could do `^(?=[^a-z\s]*[a-z])[\w@.]+$` instead of an evil greedy dot. – revo Jun 26 '18 at 12:18

Regex for containig at least one latin character

2 Answers2

Demo