COMMONJS Module Specification

1. What is Modular

File scope

Communication rules

Load require

Export exports

2, COMMONJS module specification

JavaScript in node also has a very important concept: module concept

Module scope

Use the Require method to load a module

Syntax: var custom variable name = require (' module ')

Two functions:

Executing the code in the loaded module

Get the exports export interface object in the loaded module

Use the exports excuse object to export members in a module

The module scope in node, in which all members of the default file are valid in the current file module

For members who wish to be accessed by other modules, we need to attach these exposed members to the object of the exports interface.

Exporting multiple members must be in the object

Module.exports = {

Key: Value,

..........

} or module.exports.xxx = xxx;

Export a single member must be module.exports.xxx = XXX;

Note: Module.exports = = = Exports

(Supplementary one humorous: 301 Status Code Permanent orientation, browser will remember, 302 status code temporary redirect)

COMMONJS Module Specification