Matching the string "/$" in a RegExp constructor [duplicate]

Question

I'm trying to match the phrase "/$" using the RegExp constructor, but no amount of escaping seems to help. Am is missing something?

RegExp("\/\$").test("/$")
// false
RegExp("/$").test("/$")
// false
RegExp("\/$").test("/$")
// false
RegExp("/\$").test("/$")
// false

Community · Accepted Answer · 2017-05-23 11:59:55Z

2

You need to use \\ instead of \ and there is no need to escape / or use regex /\/\$/ directly. Check RegExp documentation for more info.

When using the constructor function, the normal string escape rules (preceding special characters with \ when included in a string) are necessary.

For example, /\w+/ is equivalent to new RegExp('\\w+')

console.log(
  RegExp("/\\$").test("/$")
)

//or

console.log(
  /\/\$/.test("/$")
)

CommunityBot

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answered Jul 19, 2016 at 5:32

Pranav C Balan

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