How to apply string object value to a variable Ex.
var str='{a:"www"}'
Now how to set
var obj={a:"www"}
I try eval() but not working
-
Possible duplicate of stackoverflow.com/questions/6487167/…HellaMad– HellaMad2012-12-05 07:32:12 +00:00Commented Dec 5, 2012 at 7:32
-
1possible duplicate of String to object in JSPeter O.– Peter O.2012-12-08 20:04:27 +00:00Commented Dec 8, 2012 at 20:04
-
possible duplicate of Safely turning a JSON string into an object0lukasz0– 0lukasz02013-07-11 09:06:08 +00:00Commented Jul 11, 2013 at 9:06
-
1If at all possible, you should use valid JSON. eval() is rarely a good ideauser1019517– user10195172014-03-12 18:37:26 +00:00Commented Mar 12, 2014 at 18:37
Add a comment
|
2 Answers
eval should work, and it's actually a MDN solution, not to mention that your string is not a valid JSON, so eval is your only option (if you don't want to include a library for that).
var str='{a:"www"}';
var obj=eval("("+str+")");
console.log(obj);
Quick test in Chrome Dev Tool:
eval("("+'{a:"www"}'+")")
Object
a: "www"
__proto__: Object
Just remember to wrap your string in parenthesis and assign it outside eval and it'll be (relatively) safe.
4 Comments
Dexygen
I wasn't wrapping mine in parentheses and I was getting an error. Wrapping the object's string representation in parentheses before calling eval() worked for me too, but why are the parentheses necessary?
BuddhiP
Is there a library to handle this?
Pimp Trizkit
@GeorgeJempty - According to the MDN Those are needed to declare a function, which I guess is the same for an object. If you are passing a string containing a list of statements, it should work.
Zachary Raineri
Awesome thank you! This should be the accepted answer
var str='{"a":"www"}';
var obj = JSON.parse(str);
5 Comments
Samuel Caillerie
Yes but now it does not corresponds to the requirement :)
Subir Kumar Sao
FYI It should also work with eval. But it is not recommended to use eval for security reasons.
Ankit_Shah55
@trebuchet Thanks, why eval is a security risk?
IberoMedia
for strings that were stored as JSON_stringify trebuchet solution works. I had string "{"1":["2013-05-10","3","#f70707"]}" and after JSON.parser I got Object {1: Array[3]}
Michael J. Calkins
@Ankit_Shah55 The only time eval becomes a problem is when User1's input is interpreted as javscript on User2. User2 is then taken to a horrible pornography site and his wife walks in. User2 then goes through a terrible divorce and never sees his children again. But that's just one way.