Conversion of String Object to String Primitive in Javascript - Stack Overflow

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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 ?

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 ?

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Share Improve this question Follow asked Sep 26, 2014 at 14:42 snow_leopardsnow_leopard 1,55633 gold badges2323 silver badges4040 bronze badges 1

• 1 You should be having string objects in the first place. – Felix Kling Commented Sep 26, 2014 at 14:58

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1 Answer 1

Sorted by: Reset to default 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.

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