JS中兼容问题的汇总

function getStyle(obj,attr){  //获取非行间样式，obj是对象，attr是值
     if(obj.currentStyle){                //针对ie获取非行间样式
          return obj.currentStyle[attr];
      }else{
          return getComputedStyle(obj,false)[attr];   //针对非ie
        }
    }

document.onclick=function(eve){
        var e=eve||window.event;
        console.log(e);
    }

function stopBubble(e){
        if(e.stopPropagation){
            e.stopPropagation();
        }else{
            e.cancelBubble = true;//兼容ie
        }
    }

    if( e.preventDefault ){
        e.preventDefault();
    }else{
        window.event.returnValue = false;//ie
    }

1.封装成对象的方式
    var EventUtil={
        addHandler:function(DOM,EventType,fn){
            if(DOM.addEventListener){
                DOM.addEventListener(EventType,fn,false);
            }else if(DOM.attachEvent){
                DOM.attachEvent('on'+EventType,fn)
            }else{
                DOM['on'+EventType]=fn
            }
        },
        removeHandler:function(DOM,EventType,fn){
            if(DOM.removeEventListener){
                DOM.removeEventListener(EventType,fn,false)
            }else if(DOM.detachEvent){
                DOM.detachEvent('on'+EventType,fn)
            }else{
                DOM['on'+EventType]=null;
            }
        }
    }


2.封装成两个函数的方式
    function addEvent(obj,inci,back){
        if(obj.addEventListener){
            obj.addEventListener(inci,back);
        }else if(obj.attachEvent){
            obj.attachEvent("on" + inci,back);
        }else{
            obj["on"+inci] = back;
        }
    }
          
    function removeEvent(obj,inci,back){
        if(obj.removeEventListener){
            obj.removeEventListener(inci,back,false);
        }else if(obj.detachEvent){
            obj.detachEvent("on" + inci,back);
        }else{
            obj["on"+inci] = null;
        }
    }

var oul = document.querySelector("ul")
    oul.onclick = function(eve){
        var e = eve || window.event;

        var t = e.target || e.srcElement;

        if(t.getAttribute("abc") == "l"){
            console.log(e.target.innerHTML)
        }
        
    }

var eve = eve||window.event;
var keyC = eve.keyCode||eve.which;