Check whether a string matches a regex in JS

Posted By: Anonymous

I want to use JavaScript (can be with jQuery) to do some client-side validation to check whether a string matches the regex:

^([a-z0-9]{5,})$

Ideally it would be an expression that returned true or false.

I’m a JavaScript newbie, does match() do what I need? It seems to check whether part of a string matches a regex, not the whole thing.

Solution

Use regex.test() if all you want is a boolean result:

console.log(/^([a-z0-9]{5,})$/.test('abc1')); // false

console.log(/^([a-z0-9]{5,})$/.test('abc12')); // true

console.log(/^([a-z0-9]{5,})$/.test('abc123')); // true

…and you could remove the () from your regexp since you’ve no need for a capture.

Answered By: Anonymous

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