ES6 module and COMMONJS, AMD essential Difference thinking

Commonjs and AMD essentially define a namespace with a global variable

Take Sea.js as an example, each module outputs an object, and the object is mounted under the Seajs.cache property, and each module exists as an object.

While the ES6 module is not, the module object does not exist when the module is not referenced.

Commonjs and AMD are run-time loaded, ES6 modules are loaded at compile time

This distinction can explain the difference, which is the most essential source of the difference.

Commonjs and AMD to load a module must first let the module execute (see the network can see the loading of the corresponding JS file), and ES6 at compile time to complete the load.

ES6 module and COMMONJS, AMD essential Difference thinking