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In this article Xiaobian introduces in detail "how to define JavaScript string as an object", the content is detailed, the steps are clear, and the details are handled properly. I hope this article "how to define JavaScript string as an object" can help you solve your doubts.

A string can be an object

In general, the JavaScript string is the original value, which can be created with the character: varfirstName= "John"

But we can also use the new keyword to define a string as an object: varfirstName=newString ("John")

Example

Varx= "John"

Vary=newString ("John")

Typeofx// returns String

Typeofy// returns Object

Note do not create String objects. It slows down execution and may have other side effects:

Example

Varx= "John"

Vary=newString ("John")

The result is false because x is a string and y is an object

= = is absolutely equal, that is, both the data type and the value must be equal.

String properties and methods

Raw value strings, such as "John", have no properties and methods (because they are not objects).

The original values can use the properties and methods of JavaScript, because JavaScript can treat the original values as objects when executing methods and properties.

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