NodeJS 中 ECMAScript module loader 为什么说他是异步的？ - V2EX
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wqq096737ink

NodeJS 中 ECMAScript module loader 为什么说他是异步的？

  •   
  •   wqq096737ink Sep 10, 2023 863 views
    This topic created in 978 days ago, the information mentioned may be changed or developed.
    NodeJS 官网文档有这样一段

    There is the ECMAScript module loader:
    It is asynchronous.
    It is responsible for handling import statements and import() expressions.

    问：为什么说 ES Module 的加载是异步的？
  • module
  • Nodejs
  • Loader
  • import
    3 replies    2023-09-10 23:48:11 +08:00
    a6MShNOj4en2EU97
        1
    a6MShNOj4en2EU97  
       Sep 10, 2023 via iPhone
    import 是在你需要的时候才会导入模块，包括 import()。

    顺便提一句：因为 require 是同步的，开始时会直接加载到本模块
    wqq096737ink
        2
    wqq096737ink  
    OP
       Sep 10, 2023
    @fw1314 第一句话不是很理解。
    动态 import(） 返回 Promise ， 说他是异步加载没什么问题/
    静态 import 不是同步加载执行被导入的模块吗？
    为啥要说 ESM loader 是异步的？
    a6MShNOj4en2EU97
        3
    a6MShNOj4en2EU97  
       Sep 10, 2023 via iPhone
    @wqq096737ink 对，你是对的，import 是编译期直接静态导入，require 是运行时导入
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