Conversion of String Object to String Primitive in Javascript

Question

A silly question I guess, how can we convert a String object in javascript to a String primitive ?
Problem is I am having a map in which key is a String literal and it is not giving any result if I am passing a String object to it. Any way i can covert that string object to primitive to get the results from map ?

You should be having string objects in the first place.

Felix Kling
– Felix Kling

2014-09-26 14:58:16 +00:00
Commented Sep 26, 2014 at 14:58 — Felix Kling
– Felix Kling, Commented Sep 26, 2014 at 14:58

apsillers · Accepted Answer · 2014-09-26 14:52:42Z

10

You can use the valueOf method to extract the primitive value from a wrapper object:

var sObj = new String("foo");
var sPrim = sObj.valueOf();

Wrapper objects (String, Boolean, Number) in JavaScript have a [[PrimitiveValue]] internal property, which holds the primitive value represented by the wrapper object:

[[PrimitiveValue]]: Internal state information associated with this object. Of the standard built-in ECMAScript objects, only Boolean, Date, Number, and String objects implement [[PrimitiveValue]].

This primitive value is accessible via valueOf.

edited Sep 26, 2014 at 14:52

answered Sep 26, 2014 at 14:45

apsillers

116k18 gold badges248 silver badges249 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Conversion of String Object to String Primitive in Javascript

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related