This proposal is developed on GitHub with the help of the ECMAScript community. There are a number of ways to contribute to the development of this specification:
The descriptions below use the following variables:
(pattern character that is matched by the
(terminal of the
"s"and otherwise is
"i"and otherwise is
"m"and otherwise is
"u"and otherwise is
Furthermore, the descriptions below use the following internal data structures:
With parameter direction.
||The number of code units from the start of a string at which the match begins (inclusive).|
||The number of code units from the start of a string at which the match ends (exclusive).|
The abstract operation RegExpInitialize takes arguments obj, pattern, and flags. It performs the following steps when called:
The abstract operation RegExpBuiltinExec with arguments R and S performs the following steps:
"g", let global be
"y", let sticky be
"u", let fullUnicode be
"length"property is n + 1.
The abstract operation GetStringIndex with with arguments S, Input, and e performs the following steps:
The abstract operation GetMatchString with arguments S and match performs the following steps:
The abstract operation GetMatchIndicesArray with arguments S and match performs the following steps:
The abstract operation MakeIndicesArray with arguments S, indices, groupNames, and hasGroups performs the following steps:
"length"property is n.
RegExp.prototype.flags is an
RegExp.prototype.hasIndices is an
© 2021 Ron Buckton, Ecma International
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