that's great! Is there anything in the backlog for composing regexps? Kind of like how perl6 does it
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Isn’t that already possible? E.g. for http://perldoc.perl.org/perlretut.html#Composing-regular-expressions-at-runtime … new RegExp(regexEscape`\\b${cmd}\\w*`, 'g')
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There are more RegExp proposals going through the TC39 process right now than there have been updates to RegExp in the history of ECMAScript
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@mathias Everything else about the evolution of Ecmascript has been "bass ackward," so this is unsurprising. Better late than never.
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any polyfill story? Can't use w/ non-evergreens... Or mainly meant for Node?
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Some of these features can be transpiled. The proposals have links to transpilers (e.g. `dotAll` & Unicode property escapes)
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I want to respond with a regex joke, but I can't remember the syntax.
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no matter how hard I looked ahead, I did not see that coming..

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If U want to play with arbitrary-length lookbehind in a JS-compatible regexp engine see https://dartpad.dartlang.org/8feea83c01ab767acdf1 …
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JavaScript, HTML, CSS, HTTP, performance, security, Bash, Unicode, i18n, macOS.
ECMAScript regular expressions are getting better! No less than FIVE proposals are currently being standardized: