Replace method with regular expression

Question

According to the document using $’ will insert the part of the string that’s after the match. But I'm unable to get it to work.

let myStr = 'My little Alligator later';
console.log(myStr.replace('gator', '$’'));

I was expecting output to be "My little Alli later" (replacing "gator" with " later", which is a string that comes after the match), but the actual output is "My little Alli$’ later". Why do I see '$’ in the output?

Please read the [documentation](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replace#Specifying_a_string_as_a_parameter). It’s `$'`, not `$’`, and it only works when the first `replace` argument is a RegExp, not a string. — Sebastian Simon, Oct 14 '19 at 10:03
And it `$'` not `$’`. Curly quotes are generally not used in programming. — Barmar, Oct 14 '19 at 10:04
@SebastianSimon Actually, only `$n` requires it to be a RegExp, since there are no capture groups in plain strings. — Barmar, Oct 14 '19 at 10:07
@Barmar Oh. In that case, this question is really just caused by a typo… — Sebastian Simon, Oct 14 '19 at 10:08
@SebastianSimonm but this works, let myStr = 'My little Alligator later'; console.log(myStr.replace('gator', '$`')); — Nag, Oct 14 '19 at 10:09
@Barmar, check output for the above one, it replaces text before the match, and using $’ replaces text after match — Nag, Oct 14 '19 at 10:12
`$\`` gets the string before the match, `$'` gets the string after the match. But `$’` has no special meaning. — Barmar, Oct 14 '19 at 10:13
That site is wrong, they used improper typesetting of the JavaScript. — Barmar, Oct 14 '19 at 10:16
@Barmar, could you please provide the working example for what I'm trying to do? — Nag, Oct 14 '19 at 10:16

score 0 · Accepted Answer · answered Oct 14 '19 at 10:17

0

You're using the wrong type of quote. It should be a straight quote, not a curly quote.

let myStr = 'My little Alligator later';
console.log(myStr.replace('gator', "$'"));

answered Oct 14 '19 at 10:17

Barmar

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Replace method with regular expression

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