Essentially, there are methods and properties available to all strings, and in the background JavaScript will perform a conversion to object and back to primitive every time a method or property is called. While this concept is a bit challenging at first, you should be aware of the distinction between primitive and object. JavaScript is able to access and utilize the built-in properties and methods of the String object wrapper without actually changing the string primitive you’ve created into an object. Most of the time you will be creating string primitives. In the first example, we simply assigned a string to a variable. We can use the typeof operator to determine the type of a value. Initializing a new string primitiveĬonst stringObject = new String("A new string.") In order to test the difference between the two, we will initialize a string primitive and a string object.
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JavaScript differentiates between the string primitive, an immutable datatype, and the String object. String Primitives and String Objectsįirst, we will clarify the two types of strings.
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Javascript string length how to#
In this tutorial, we will learn the difference between string primitives and the String object, how strings are indexed, how to access characters in a string, and common properties and methods used on strings. Each character in a JavaScript string can be accessed by an index number, and all strings have methods and properties available to them. A string is a sequence of one or more characters that may consist of letters, numbers, or symbols.