console 命令行工具 X clear

console

// 节流
var input = document.getElementById('input');

function throttle(f,ms) {
	var prev = new Date();
  return function() {
    let now = new Date();
    if(now - prev > ms) {
      f();
      prev = new Date()
    }
  }
}

function change() {
  console.log(input.value)
}


input.addEventListener('keyup',throttle(change,1500) )

<input id='input'>