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rauschma/regexp-global-sticky.md

Last active January 1, 2020 08:57
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regexp-global-sticky.md

Summary: .global (/g) and .sticky (/y)

/g /y /yg
.exec() at .lI or later at .lI same as /y
.test() at .lI or later at .lI same as /y
.replace() ignores & resets .lI at .lI /g w/o gaps
.replaceAll() ignores .lI TypeError /g w/o gaps
.search() no effect no effect no effect
.match() Array of group 0 captures like .exec() /g w/o gaps
.matchAll() Iterable of match objects TypeError /g w/o gaps

Legend:

  • .lI means .lastIndex
  • If .lastIndex is mentioned, it is also updated.
  • If .lastIndex is not mentioned, it is not changed.
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