• flags:
    g i m y
  • Test
  • err
  • output
  • Pattern
    .
    Matches any Char (use m flag to match linebreaks)
    \w\W
    Word char & not word char
    \d\D
    Digit & not digit
    \s\S
    Whitespace char & not whitespace char
    []
    matching set
    [^]
    Not matching set
    [x-y]
    Range can be alpha or numberic
    \t
    tab
    \r
    return
    \n
    newline
    \xXX
    Hex index selector
    \
    escape
    ^
    Begins with
    $
    Ends with
    (?=ABC)
    Positive Lookahead
    (?!ABC)
    Nagative Lookahead
    (?<=ABC)
    Positive Lookbehind
    (?<!ABC)
    Negative Lookbehind
    ?
    Optional (Lazy)
    *
    0 or more (add ? to make lazy)
    +
    1 or more (add ? to make lazy)
    {x}
    Matches exactly x amount
    {x,y}
    Matches between x and y amounts (add ? to make lazy)
    ()
    Capturing Group
    (?:)
    Non-capturing Group
    |
    Or
    \x
    Inserts the x number of capture group for select
    Replace Functions:
    $
    Insertion ($$ to escape) for Replace
    $&
    Inserts matched substring
    $`
    Inserts proceeding
    $'
    Inserts following
    $1
    Inserts first capture group
    ^\d{3}([-\.]?)\d{3}\1\d{4}$
  • Text to match against
    888-888-8888