~~~ const EventEmitter = require('events'); class CustomEvent extends EventEmitter{ } const ce = new CustomEvent(); var fn1=()=>{ console.log('fn1') } var fn2=()=>{ console.log('fn2') } ce.on('test',fn1) ce.on('test',fn2) setInterval(()=>{ ce.emit('test') },500) setTimeout(()=>{ ce.removeListener('test',fn1) },1500) ~~~