Intent to Ship: RegExp @@matchAll / String.prototype.matchAll
Peter Wong
Contact emails
peter....@gmail.com
jgr...@chromium.org
yan...@chromium.org
Spec
https://github.com/tc39/proposal-string-matchall/
https://tc39.github.io/proposal-string-matchall/
Summary
String.prototype.matchAll behaves similarly to String.prototype.match, but returns a full regexp result object for each match in a global or sticky regexp.
Motivation
This offers a simple way to iterate over matches when access to e.g. capture groups is needed.
const string = 'Magic hex numbers: DEADBEEF CAFE 8BADF00D';
const regex = /\b[0-9a-fA-F]+\b/g;
for (const match of string.matchAll(regex)) {
console.log(match);
}
// Iteration 1:
[
'DEADBEEF',
index: 19,
input: 'Magic hex numbers: DEADBEEF CAFE 8BADF00D'
]
// Iteration 2:
[
'CAFE',
index: 28,
input: 'Magic hex numbers: DEADBEEF CAFE 8BADF00D'
]
// Iteration 3:
[
'8BADF00D',
index: 33,
input: 'Magic hex numbers: DEADBEEF CAFE 8BADF00D'
]
Interoperability risk
Firefox: In development - https://bugzilla.mozilla.org/show_bug.cgi?id=1435829
Edge: No public signals
Safari: No public signals - https://bugs.webkit.org/show_bug.cgi?id=186694
Web developers: Positive
Compatibility risk
The spec has undergone a few updates and depending on whether other implementations have kept up, there is a possibility V8 could differ in behavior. At the time of writing, V8 is current with all the latest spec updates and have contributed updates to the test262 test suite to minimize difference between other implementations.
V8 tests (mjsunit) as well as all test262 tests pass for this feature.
Will this feature be supported on all six Blink platforms (Windows, Mac, Linux,
Chrome OS, Android, and Android WebView)?
Yes
Link to entry on the Chrome Platform Status
https://www.chromestatus.com/features/5520028858318848
Requesting approval to ship?
Yes. Note that since this is a V8/JS feature, this post is just an FYI to blink-dev — no signoff from Blink API owners is required.
Sathya Gunasekaran
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Adam Klein
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Jakob Gruber
Mathias Bynens
PhistucK
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Benedikt Meurer
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Benedikt Meurer
Software Engineer
Google Germany GmbH
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jassey...@gmail.com
On Friday, December 14, 2018 at 12:27:22 AM UTC+1, Sathya Gunasekaran wrote:
LGTM
On Thu, Dec 13, 2018 at 2:01 PM Peter Wong <peter...@gmail.com> wrote:
>
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