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    <p>It's analogous to the difference between <code>int</code> and <code>Integer</code> in Java.</p> <p>According to the standard, strings are automatically converted to <code>String</code> objects when you try to call a method. See <a href="http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf" rel="nofollow noreferrer">ECMA 262-3 section 11.2.1</a>; step 5 calls <code>ToObject</code> (which is defined in section 9.9).</p> <blockquote> <p>11.2.1 Property Accessors <br>[...]<br> The production MemberExpression : MemberExpression [ Expression ] is evaluated as follows:</p> <ol> <li>Evaluate MemberExpression.</li> <li>Call GetValue(Result(1)).</li> <li>Evaluate Expression.</li> <li>Call GetValue(Result(3)).</li> <li>Call ToObject(Result(2)).</li> <li>Call ToString(Result(4)).</li> <li>Return a value of type Reference whose base object is Result(5) and whose property name is Result(6).</li> </ol> </blockquote> <p><br></p> <blockquote> <p>9.9 ToObject</p> <p>The operator ToObject converts its argument to a value of type Object according to the following table: <br>[...]<br> Create a new String object whose [[value]] property is set to the value of the string. See 15.5 for a description of String objects.</p> </blockquote> <p>As a specification technique, this is a hack to explain how strings can appear to have methods even though they're not really objects.</p> <p>Apart from that, the wrapper objects are not very useful. I don't know why they're in the language. I rather wish they weren't. :)</p>
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    1. PODifference between the javascript String Type and String Object?
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    1. USJason Orendorff
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    1. COOk, so basically javascript automatically boxes the string values to String objects during runtime when methods are called on them? If this is the case, why is it not defined in the specification (If it is and I have missed it, where can i find it?) ?
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    2. COIt's not analogous to the difference between `int` and `Integer` in Java. `int` is a primitive type, and `Integer` is a class. While autoboxing usually removes the visible distinction in newer versions of Java, there is no primitive string type in Javascript.
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    3. COfriedo, strings are explicitly called primitive values in the standard.
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