JS原生实现transform样式控制

function (node,type,val){
          
   
			if(typeof node ==="object" && typeof node["transform"] ==="undefined" ){
          
   
				node["transform"]={
          
   };
			}

			if(arguments.length>=3){
          
   
				//设置
				var text ="";
				node["transform"][type] = val;

				for( item in node["transform"]){
          
   
					if(node["transform"].hasOwnProperty(item)){
          
   
						switch (item){
          
   
							case "translateX":
							case "translateY":
								text +=  item+"("+node["transform"][item]+"px)";
								break;
							case "scale":
								text +=  item+"("+node["transform"][item]+")";
								break;
							case "rotate":
								text +=  item+"("+node["transform"][item]+"deg)";
								break;
						}
					}
				}
				node.style.transform = node.style.webkitTransform = text;
			}else if(arguments.length==2){
          
   
				//读取
				val =node["transform"][type];
				if(typeof val === "undefined"){
          
   
					switch (type){
          
   
						case "translateX":
						case "translateY":
						case "rotate":
							val =0;
							break;
						case "scale":
							val =1;
							break;
					}
				}
				return val;
			}
		}