What are the commonly used built-in objects in js?

Commonly used built-in objects in js include "Object", "Function", "Array", "String", "Number", "Boolean", "Date", "Math", "RegExp", "Error" ", "JSON" and "Global" 12 types: 1. Object, the parent object of all objects in js; 2. Function, function object; 3. Array, array object; 4. String: string object, etc.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

In JavaScript, there are many commonly used built-in objects that can be used directly in code. The following are some common built-in objects:

1. Object: The parent object of all objects in JavaScript, including arrays, functions, etc., inherit from the Object object.

2. Function: Function object. In JavaScript, functions are also objects and can be passed, assigned, etc. like other objects.

3. Array: Array object, used to store an ordered collection of multiple values.

4. String: String object, used to represent text data.

5. Number: Numeric object, used to represent numerical values.

6. Boolean: Boolean object used to represent true or false.

7. Date: Date object, used to process date and time.

8. Math: Mathematical object, which provides many methods related to mathematical calculations, such as trigonometric functions, logarithmic functions, etc.

9. RegExp: Regular expression object, used to process and manipulate pattern matching of strings.

10. Error: Error object, an object used to represent error information.

11. JSON: An object used to parse JSON format data, providing serialization and deserialization methods for JSON data.

12. Global: Global object, providing some global methods and properties, such as parseInt, setTimeout, etc.

In addition to the objects listed above, JavaScript also has many other built-in objects, such as Map, Set, Promise, etc., which provide developers with a wealth of functions and tools to help develop to program JavaScript more efficiently.

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