1.键盘检测兼容写方法

var key = e.keyCode || e.which || e.charCode;

2.阻止冒泡事件冒泡的兼容

e.stopPropagation ? e.stopPropagation():e.cancelBubble = true;

3.鼠标箭头事件对象的兼容

obj.onclick = function(evt){
          var e = evt || event;
          alert(e);
}

4.阻止浏览器默认事件兼容

e.preventDefault?e.preventDefault():e.returnValue = false;

5.获取非行间样式的兼容写法

function getStyle(obj,sName){
   if(obj.currentStyle){
     return obj.currentStyle[sName];
   }else{
     return getComputedStyle(obj,false)[sName];
  }
}

6.ajax核心对象的兼容写法

let xhr;
if (window.ActiveXObject) { //ie
    xhr = new ActiveXObject("Microsoft.XMLHttp");
} else { //非ie
   xhr =  new XMLHttpRequest();
}

链接: https://fly63.com/article/detial/3322