How do I add slashes to a string in Javascript?

Question

Just a string. Add \\\' to it every time there is a single quote.

Answer 1

An answer you didn't ask for that may be helpful, if you're doing the replacement in preparation for sending the string into alert() -- or anything else where a single quote character might trip you up.

str.replace("'",'\x27')

That will replace all single quotes with the hex code for single quote.