Adding DOTALL modifier to ECMAScript regex standards

Andrea Giammarchi andrea.giammarchi at
Wed Aug 10 14:12:00 UTC 2016

Just to double check, your `/he[\d\D]?llo/` should be `/he[\d\D]*?llo/`,
Otherwise it's not the same as `/he[.*]?llo/`

On Wed, Aug 10, 2016 at 3:02 PM, Jake Reynolds <jreynoldsdev at>

> Hello,
> I brought up the topic of adding the DOTALL modifier to the Chrome V8
> Engine here
> <!topic/chromium-discuss/K9h0qB3Z3Gw> and
> was directed to es-discuss.  I was curious about the practicality and the
> want for adding a DOTALL modifier to the ECMAScript standards in the future?
> For those that don't know that DOTALL modifier is a regex modifier that
> allows the '.' symbol to match newlines as well.
> *Example regex:* /he[.*]?llo/
> *Example search string 1: *hello
> *Example search string 2: *he
> llo
> The above regex will match the 1st search string but will not match the
> 2nd.
> In ECMAScript the only current way to make a match like that work is to
> use [\d\D] which will match everything including newlines, given below.
> *Current workaround regex: */he[\d\D]?llo/
> The *s* modifier is the standard in most major languages except
> Javascript and Ruby.  This will allow newline matching for the . symbol.
> The proposed regex is below:
> *Proposed new regex: */he[.*]?llo/s
> *Example search string: *he
> llo
> Let me know if there is any more information I can provide, or any
> questions you have.
> Thanks much,
> Jake
> _______________________________________________
> es-discuss mailing list
> es-discuss at
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