这是箭头函数在浏览器中是全局的但在 NodeJS 中不是

Question

在Googlechrome

const ExampleObject5 = () => {
    console.log(this===window)
}

ExampleObject5()

打印为真

但在节点

const ExampleObject5 = () => {
    console.log(this===global)
}

ExampleObject5()

打印错误

Answer 1

通过阅读NodeJS Documentation:

global

The global namespace object.

In browsers, the top-level scope is the global scope. That means that in browsers if you're in the global scope var something will define a global variable. In Node.js this is different. The top-level scope is not the global scope; var something inside an Node.js module will be local to that module.

因此在 Node 中，顶级作用域不是全局作用域（如在浏览器中），而是模块本身。

这是箭头函数在浏览器中是全局的但在 NodeJS 中不是

this is Arrow functions in browser is global but not in NodeJS

javascript

ecmascript-6

this

arrow-functions