What are the categories of objects in JavaScript?

Objects in JavaScript can be divided into three major categories, namely internal objects (local objects and built-in objects), host objects and custom objects.

1. Internal objects

1. Local objects, objects provided by ECMAScript that need to be instantiated (new) before they can be used:

Object, Function, Array, String, Boolean , Number, Date, RegExp, Error, EvalError, RangeError, ReferenceError, SyntaxError, TypeError, URIError

2. Built-in objects, objects provided by ECMAScript that can be used without instantiation:

Only Global (global object) and Math

2. Host object

are objects provided by the browser. All BOM and DOM are host objects.

3. Custom objects

Objects defined by developers themselves

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