为什么节点使用不需要导入? [英] why node uses require not import?

问题描述

我正在学习node.js，想知道为什么它使用require语法而不是React使用的import语法.

I'm learning node.js and am wondering why it uses the require syntax rather than the import syntax which React uses.

即

const Validator = require("validator");

VS

import Validator from "validator";

我相信import是es6，但是我不认为这解释了为什么它不在节点中使用.

I believed import is es6 but I don't think that explains why it's not used in node.

推荐答案

import和default是较新的ES6功能，尚未被节点使用. 实际上，Node已经通过实验将新功能实现为实验:仅使用--experimental-modules标志用于以.mjs扩展名保存的文件.

the import and default are newer ES6 features, not yet used by node. Node is actually already implementing the new features as experiment though: with the --experimental-modules flag and only for files saved with .mjs extension.

像 babel 这样的编译器使编写现代的，经过规格认可和/或实验性的 Webpack )和诸如babel这样的编译器的情况下，编写可维护的，面向未来的javascript变得很容易，尽管代码仍然受到广泛支持，因为它已转换为commonjs(您看到的格式可由require(老式的import)和module.exports(老式的export)识别.

Transpilers like babel make it possible to write modern, spec approved and /or experimental ECMAScript. In an ecosystem of bundlers like Webpack with transpilers like babel, it becomes easy to write maintainable, future-proof javascript, while the code remains widely suported because it's transformed to commonjs (the format you see recognizable byrequire (the old-school import) and module.exports (the old-school export).

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