What are the functions of built-in objects?

Built-in objects refer to objects defined by language specifications, which developers can use directly without additional definitions. Their functions include: 1. Provide many basic functions and data structures, and developers can directly use these built-in objects. objects to complete common tasks; 2. Expand the functions and capabilities of the JavaScript language by providing native methods and properties; 3. Enable JavaScript to have a set of standard interfaces and data structures; 4. Provide a lot of infrastructure for development Provide the necessary basic support for the author's work.

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

In JavaScript, built-in objects refer to objects defined by language specifications that developers can use directly without additional definitions. These built-in objects include global objects, native objects, and constructor objects, etc. They play various important roles in JavaScript, such as:

1. Provide basic functions: Built-in objects provide many For basic functions and data structures, such as string operations, array operations, date processing, etc., developers can directly use these built-in objects to complete common tasks without having to reimplement these functions themselves.

2. Extended language functions: Built-in objects extend the functions and capabilities of the JavaScript language by providing native methods and properties, allowing developers to process various types of data and tasks more conveniently .

3. Standardized interface: The existence of built-in objects enables JavaScript to have a set of standard interfaces and data structures. Different JavaScript environments (browsers, Node.js, etc.) all support these built-in objects. Provides consistent support, enabling cross-platform compatibility.

4. Provide infrastructure: Built-in objects also provide many infrastructures, such as global variables, mathematical calculations, regular expression processing, etc., providing necessary basic support for developers' work.

In general, built-in objects play a very important role in JavaScript. They provide developers with rich functions and interfaces, greatly simplifying development tasks, and at the same time Contributes to the consistency and stability of the JavaScript runtime environment.

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