webpack4-02 concept

What 1.webpack that?

Module Packaging Tool

2. Support for multiple syntax specification

ES module wording:

Export:

//a.js
function App () {
     console.log('hello world')
}

export default App;

 

Import:

The index.js // 

Import from the App './a.js'; 

// business logic

　　

CommonJs specification

Export:

//a.js
function App () {
     console.log('hello world')
}

module.export=App;　　

 

Import:

The index.js // 

var = the App the require ( './ a.js'); 

// business logic