[Node.js] global

Global objects | Node.js v16.15.0 Documentation (nodejs.org)

Global objects | Node.js v16.15.0 Documentation

console.log(global);

브라우저에서는 window가 글로벌 객체이고,

node.js에서는 global 이 글로벌 객체이다.

C:\Users\User\gitprogect\NodeJs> node 1-global/app
<ref *1> Object [global] {
  global: [Circular *1],
  clearInterval: [Function: clearInterval],
  clearTimeout: [Function: clearTimeout],
  setInterval: [Function: setInterval],
  setTimeout: [Function: setTimeout] {
    [Symbol(nodejs.util.promisify.custom)]: [Getter]
  },
  queueMicrotask: [Function: queueMicrotask],
  performance: Performance {
    nodeTiming: PerformanceNodeTiming {
      name: 'node',
      entryType: 'node',
      startTime: 0,
      duration: 82.2766999900341,
      nodeStart: 1.1915000081062317,
      v8Start: 4.617000013589859,
      bootstrapComplete: 58.125800013542175,
      environment: 25.251300007104874,
      loopStart: -1,
      loopExit: -1,
      idleTime: 0
    },
    timeOrigin: 1652455410843.36
  },
  clearImmediate: [Function: clearImmediate],
  setImmediate: [Function: setImmediate] {
    [Symbol(nodejs.util.promisify.custom)]: [Getter]
  }
}

 

global.hello = () => {
  console.log("hello");
};
global.hello(); //hello
hello(); //hello

 

global.hello = () => {
    global.console.log("hello");
};
global.hello(); //hello
hello(); //hello