nodejs 中on 和 emit

var EventEmitter = require(‘events‘).EventEmitter

var life = new EventEmitter();

//
life.on(‘求安慰‘, function(who){
  console.log(‘xxxx‘)
})



function check(){
  console.log(‘xxxx4354‘)
}

life.on(‘boys‘,check)


// 移除监听
life.removeListener(‘boys‘, check)

var hasconforListeren = life.emit(‘求安慰‘, ‘汉子‘);
var hasconforListeren = life.emit(‘boys‘, check);
console.log(hasconforListeren)

console.log(life.listeners(‘boys‘))

console.log(EventEmitter.listenerCount(life, ‘求安慰‘))