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Regex
  • ​MDN​

Matching one string

1
"aaaa".match(/[a]/)
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Result:
1
["a"]
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Matching multiple substrings

1
"a a123a a123a b123b c".match(/a(123)a/g)
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Result:
1
["a123", "a123"]
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Note the trailing /g
  • You cannot select individual groups while using g
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Matching one string
Matching multiple substrings