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Let's say I want to match one of the following characters: a, b, c, or + (in JavaScript). Do I need to escape the +? Is it /[abc+]/ or /[abc\+]/? Both work in my limited selection of test browsers. Which is (more) correct?

Let's say I want to match one of the following characters: a, b, c, or + (in JavaScript). Do I need to escape the +? Is it /[abc+]/ or /[abc\+]/? Both work in my limited selection of test browsers. Which is (more) correct?

  • javascript
  • regex
Share Improve this question asked Jul 9, 2010 at 7:40 Casey ChuCasey Chu 25.5k10 gold badges42 silver badges59 bronze badges
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2 Answers 2

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Regex reference

Under character classes:

Any character except ^-]\ add that character to the possible matches for the character class.

In other words, you don't have to escape the +.

No need to escape the + in character class [xxx]:

/[abc+]/

本文标签： javascriptSpecial Characters in Regex BracketsStack Overflow

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