JavaScript: Regex Replacement String Dollar Sign Sequence

When using regex, the following dollar sign sequence have special meaning in the replace string.

This is used by:

• JavaScript: String.prototype.replace
• JavaScript: String.prototype.replaceAll

$n

nth captured match. (n is a positive integer less than 100)

$<name>

refers to named capture name.

$&

the matched string.

$`

the string before the matched string.

$'

the string after the matched string.

$$

literal dollar sign character.