RegExp doubt regarding symbols

Trying to understand and replicate a text highlighter in JS and came across this particular command:

textToSearch = textToSearch.replace(/[.*+?^${}()|[\]\\]/g,"\\$&"); 

as shown in the photo below. What does the set of symbols followed by a "/g " mean ? What does β€œ\$&” mean ???

HTML code
HTML code

JS code

that’s a regular expression with a g (global) flag, the flags go after the closing / of the regular expression

this is replace syntax, let’s look at the documentation:

$& will add the matched string in the string to substitute

1 Like

Thanks for the help!!!

This topic was automatically closed 182 days after the last reply. New replies are no longer allowed.