I would like to do a regular expression that does not allow more than 1 consecutive spaces.
For example:
A Bb 7is validAA Ois not valid00 55is validA bis not valid
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Check stackoverflow.com/questions/1981349/…James– James2022-11-17 15:58:22 +00:00Commented Nov 17, 2022 at 15:58
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Take a look at this stackoverflow.com/questions/21722081/… . It's very similar with what you wantCW_– CW_2022-11-17 15:58:44 +00:00Commented Nov 17, 2022 at 15:58
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3 Answers
Here you can try this logic :
let str = "apple mango pine";
let result = str.match(/ {2,}/g);
if (result) {
console.log("two consecutive spaces are not allowed");
} else console.log("valid");
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Depending on your exact needs I can provide two versions:
This works with only the "space" character, but does not take other spacing characters from Unicode into account:
^[^ ]*(?: [^ ]+)* ?$
That takes the regex spacing characters into account, so also uses newlines, tabs etc. as "space":
^\S*(?:\s\S+)*\s?$
Both regular expressions match when they find a valid input.
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What makes you think you need a regular expression for this?
if (string.includes(' '))
alert('error!')
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