How do I replace a double-quote with an escape-char double-quote in a string using JavaScript?

Question

Say I have a string variable (var str) as follows-

Dude, he totally said that "You Rock!"

Now If I\'

Answer 1

You need to use a global regular expression for this. Try it this way:

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

Check out regex syntax and options for the replace function in Using Regular Expressions with JavaScript.