javascript string to variable

Question

I am receiving a JSON string from an ajax call and would like to convert a value to a predefined variable:

var predefined = \"hello world\";
var foo = {\"msg         


        

Answer 1

var out = eval(foo.msg); // out is now "hello world"

Note: do not use eval() if you are not sure what the content of foo.msg is.

or

var out = foo.msg=="predefined" ? predefined : foo.msg;