Adding DOTALL modifier to ECMAScript regex standards
Just to double check, your /he[\d\D]?llo/ should be /he[\d\D]*?llo/,
right?
Otherwise it's not the same as /he[.*]?llo/
Correct, sorry about that. I should have verified in a regexr before typing up the examples.
If it's any consolation there is the more compact hack of [^], which I
think is supposed to work everywhere.
I agree, I doubt functionality in IE8- will matter, but I was thinking it would be nice to align the regex modifiers with other languages for the future.
Java: docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html#DOTALL Python: docs.python.org/2/library/re.html#re.DOTALL C#: msdn.microsoft.com/en-us/library/system.text.regularexpressions.regexoptions(v=vs.110).aspx
There is a variety of namings for this across the languages
(DOTALL/SINGELINE) but I believe the most often used modifier to be
/.../s which would be a nice addition to have.
My response bounced back to me, not sure if it went through.
I agree, I doubt functionality in IE8- will matter, but I was thinking it would be nice to align the regex modifiers with other languages for the future.
Java: docs.oracle.com/javase/7/docs/api/java/util regex/Pattern.html#DOTALL Python: docs.python.org/2/library/re.html#re.DOTALL C#: msdn.microsoft.com/en-us/library/system.text. regularexpressions.regexoptions(v=vs.110).aspx
There is a variety of namings for this across the languages
(DOTALL/SINGELINE) but I believe the most often used modifier to be
/.../s which would be a nice addition to have.
On 10 Aug 2016, at 16:02, Jake Reynolds <jreynoldsdev at gmail.com> wrote:
I brought up the topic of adding the DOTALL modifier to the Chrome V8 Engine here 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
Formal proposal (incl. proposed spec changes) for this feature: mathiasbynens/es
Formal proposal (incl. proposed spec changes) for this feature:
mathiasbynens/es-regexp-singleline-flag
Very well written, thank you for writing that up. I've not been part of this process before so I'm not sure how it works, but if there is anything you need/want from me feel free to reach out.
Thanks, Jake
Hello,
I brought up the topic of adding the DOTALL modifier to the Chrome V8 Engine here groups.google.com/a/chromium.org/forum/#!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