(Transfer) The difference between import and require

Before ES6, there was a bill to load JS modules, the most important being CommonJS and AMD specifications. The former CommonJS is mainly used in servers to achieve synchronous loading, such as nodejs. The AMD specification is applied to browsers, such as requirejs, for asynchronous loading.

The difference between import and require

The most important idea in node programming is modularity. Import and require are both modularized.

Require is called at runtime, so it can be imported everywhere

Import is called at compile time and must be imported at the beginning of the file. Currently, some browsers do not support it. You need to use babel to convert es6 to es5 and then execute

import (es6 syntax)

ES6 modules mainly have two functions: export and import

export is used to output the interface of this module (a file can be understood as a module) variables

import is used to load the export output variable interface in a module

Such as the following code:

,,,,,,, Variable

,,,,,, Import variables

require (CommandJS specification, used in nodejs)

In the nodejs environment, we use the CommandJS module specification, use require to import modules, and use module.exports to export interfaces

Such as the following code:

,,,, Derive the variables

,,, Derive

OF: jinya2437
Link: https://www.jianshu.com/p/4061d77128e6
Source: Jianshu
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