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In Ruby I have a regex to get a string formatted like "@xxx":

(/(?<!\S)@[A-Za-z0-9\-]+/)

I also need this regex on the client side, but JavaScript can't read this.

How can I change this regex to JavaScript?

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Well you don't have lookbehind in JavaScript regular expression so you can't use (?<!\S) in a JavaScript regex.

You can use:

/(?:^|\s)(@[A-Za-z0-9-]+)/

And use captured group #1 for your matched text.

Alternatively you can use XRegExp library in JS and use the lookbehind feature.

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1 Comment

sorry i don't know about it. now I have ticked it. thanks again

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