Comments (1)
原文写法:
function debounce(fn, delay) { //记录上一次的延时器 var timer = null; return function () { //清除上一次的演示器 clearTimeout(timer); //重新设置新的延时器 timer = setTimeout(function(){ //修正this指向问题,!!setTimeout在这里改变了this的指向,指向了window! fn.apply(this); }, delay); } }正确写法:
function debounce(fn, delay) { //记录上一次的延时器 var timer = null; return function () { //清除上一次的演示器 clearTimeout(timer); // 保存执行上下文的this对象,例如:事件触发对象 var that = this; //重新设置新的延时器,使用箭头函数可能更好 timer = setTimeout(function(){ fn.apply(that); }, delay); } }
setTimeout里边直接用箭头函数也可以
from interviewer.
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from interviewer.