JavaScript regex, searching for hashtags

Question

How can I search some text for any and all hashtags (alphanumeric AND underscore AND hyphen) and wrap them in span tags eg search ``` some_string = "this is some text with 3 hashtags #Tag1 and #tag-2 and #tag_3 in it" ``` and convert it to: ``` "this is some text with 3 hashtags #Tag1 and #tag-2 and #tag_3 in it" ``` I've got this so far: ``` some_string = some_string.replace(/\(#([a-z0-9\-\_]*)/i,"$1"); ``` but one fault is it doesn't include the # in the wrappings like it should. It seems to output: ``` "this is some text with 3 hashtags Tag1 and #tag-2 and #tag_3 in it " ``` Also it only detects the first hashtag that it comes across (eg. `#Tag1` in this sample), it should detect all. Also I need the hashtags to be a minimum of 1 character AFTER the #. So # on its own should not match. Thanks

Accepted Answer

Try this replace call: EDIT: if you want to skip `http://site.com/#tag` kind of strings then use: ``` var repl = some_string.replace(/(^|\W)(#[a-z\d][\w-]*)/ig, '$1$2'); ```

JavaScript regex, searching for hashtags

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