JavaScript中的正则表达式替换，用于转义用单引号引起来的特殊字符

Question

In my JavaScript file, I have a variable which takes values like the following

stringToBeReplaced = input[name='Wanna Be Startin' Somethin'']

stringToBeReplaced = input[name='They Don't Care About Us']

stringToBeReplaced = input[name='Workin' Day & Night']

The pattern will be always like input[name='*'] with * could be anything. What I am trying to achieve is to escape only the single quotes and ampersand (' &) appearing in the * field without escaping the enclosing single quotes using regex replace.

The regex I have formed so far is as follows and what is still pending is to ignore the first single quote from the above pattern. ie the the single quote preceded by = sign

stringToBeReplaced.replace(/((['&])(?!\]))/g,'\\$1'));

Any help is much appreciated.

Answer 1

You can try like this:

(?<!=)(['&])(?!])

(?<!=) Negative look behind for =

(['&]) Select the desired characters in character class and capture in group

(?!]) Negative look ahead for closing ]

Replace with:

\\ and captured group

Demo:

https://regex101.com/r/CQbwtF/5