How to escape all single and double quotes in JavaScript

Question

I have a variable in my script,

var st = ""

In that quotes I have to give a string and this string contains lot of single and double quotations.

I think there isn't any problem with single quotations, but a problem with the double quotes (") only.

In this I can't manually replace \" for all, even I tried with an editor that " replace with \", but it's not working.

Solution

You will need to use regular expression for this,

st.replace(/"/g, '\\"');

Check out more on regular expressions here.

Comments

[Jukka K. Korpela]

It is unclear what is asked here. Escaping " as \" within a string literal with " as delimiters is sufficient. If it does not work, you should ask a specific question with an example that actually demonstrates the issue. (“Not working” is not a description of what happens.)

[InfiniteStack]

Nowadays it's Backtick Quotes (at the time op asked the question backticks weren't part of JavaScript spec yet) Here's how it works youtube.com/watch?v=4dr3y0ZT3vI

[karim_fci]

Here is one mistake. not st.replace(). It should be str.replace().

[vasa]

the variable used in the qn is 'st'. Hence, st.replace()

[Erenor Paz]

This does not escape, it only removes all the quotes. This is not really what the OP was asking...but since you're doing the replace on the variable str, there's no fear about modifying original string ;-)

[blue-sky]

@vasa minor point, this does not update 'st' in place, should use st = st.replace(/"/g, '\\"');

[vasa]

@blue-sky Agree, strings are immutable in JS.

[Wes Modes]

This does not replace single quotes.