104 css选择器的的封装 $("#ele").css() $(".ele").css() $("ele").css()_html/css_WEB-ITnose

//demo.js 调用

window.onload = function () {
// $().getClass("a").css("color","red");//旧方法
/* $("#box").css("color", "red").click(function(){
alert($(this).html())
});*/
//$(".a").css("color","green")
// $("p").find(".a").css("color","blue");
$("div").find("span").css("color","red")
// $("div").find(".a").css("color","red");
//$("div").find("#bb").css("color","red")


//$(".a").css("color","red")
};

//Base.js

var $=function(args)//调用,把this传递过来
{
return new Base(args);


};
//对象式
function Base(args)
{
//创建一个数组来获取节点和节点的数组
this.elements=[];//私有化，不共用
if(typeof args=="string")//$(".a").css("color","green")这样调用执行这里
{
switch (args.charAt(0))
{
case "#":
this.elements.push(this.getId(args.substring(1)));
break;
case ".":
this.elements=this.getClass(args.substring(1));//getClassreturn的是数组所以直接赋值
break;
default :
this.elements = this.getTagName(args);//getClassreturn的是数组所以直接赋值
}
}
else if(typeof args=="object") // $().getClass("a").css("color","red");这样调用就执行这里
{
if(args!=undefined)//这里的_this是一个对象，undefined也是个对象，却别typeof放回的带单引号的 “undefined”
{
this.elements[0]=args; //把this放到数组的第一个
}
}


}
//设置css选择子节点
Base.prototype.find=function(str)
{
var childElements=[];//临时数组避免和base.element[]冲突
for(var i=0;i {
switch (str.charAt(0))
{
case "#":
childElements.push(this.getId(str.substring(1)));
break;
case ".":
/* var all=this.elements[i].getElementsByTagName("*");
for(var j=0;j {
if(all[j].className==str.substring(1))
{
childElements.push(all[j]);
}
}*/
var temps = this.getClass(str.substring(1), this.elements[i]);
for (var j = 0; j childElements.push(temps[j]);
}
break;
default :
var tags=this.elements[i].getElementsByTagName(str);
for(var j=0;j {
childElements.push(tags[j]);
}
}
}
this.elements=childElements;
return this;
};


//获取ID节点
Base.prototype.getId = function (id) {
//返回ID节点的本身对象
return document.getElementById(id);
};
//获取元素节点数组
Base.prototype.getTagName = function (tag, parentNode) {
var node = null;
var temps = [];
if (parentNode != undefined) {
node = parentNode;
} else {
node = document;
}
var tags = node.getElementsByTagName(tag);
for (var i = 0; i temps.push(tags[i]);
}
return temps;
};
//class获取
Base.prototype.getClass=function(className,parentNode)
{
var node=null;
var temps=[];//临时数组避免和base.element[]冲突
if(parentNode!=undefined)
{
node=parentNode;
}
else
{
node=document;
}
var all=node.getElementsByTagName("*");
for(var i=0;i {
if(all[i].className==className)
{
temps.push(all[i]);//给临时数组添加
}
}
return temps; //返回临时数组
};
//获取某个节点,并且返回Base对象
Base.prototype.eq=function(num)
{
var element=this.elements[num];
this.elements=[];//清空数组
this.elements[0]=element;//重新赋值
return this; //返回如jq的eq（）一样的东西
};


//获取某个节点,并且放回这个节点的对象
Base.prototype.get=function(num)//
{
return this.elements[num];//返回如jq的get（）一样的东西
};
//设置CSS
Base.prototype.css = function (attr, value) {
for (var i = 0; i if (arguments.length == 1) {
return getStyle(this.elements[i], attr);//为什么这里需要return呢
}
this.elements[i].style[attr] = value;
}
return this;
};
Base.prototype.click=function(fn)
{
for(var i=0;i {
this.elements[i].onclick=fn;
}
return this;
};
//设置innerHtml 获取innerHTML
Base.prototype.html=function(value)
{


for(var i=0;i {
if(arguments.length==0)
{
return this.elements[i].innerHTML;
}
else
{
this.elements[i].innerHTML=value;
}


}
return this;
};
//添加class
Base.prototype.addClass=function(className)
{
for(var i=0;i {
if(!hasClass(this.elements[i],className))//判断是否已经有这个class
{
this.elements[i].className+=' '+className;
}
}
return this;
};
//移出class
Base.prototype.removeClass=function(className) //调用方法$().getClass("dd").addClass("a").addClass("b").removeClass("b");
{
for(var i=0;i {
if(hasClass(this.elements[i],className))//判断是否已经有这个class
{
this.elements[i].className=this.elements[i].className.replace(new RegExp('(\\s|^)'+className+'(\\s|$)'),'');
}
}
return this;
};
//添加link或style的css规则,不常用
Base.prototype.addRule=function(num,selectorText,cssText,position) //调用方法， $().addRule(0,"body","background:red",0)
{
var sheet=document.styleSheets[num];
if(typeof sheet.insertRule!="undefined")//w3c
{
sheet.insertRule(selectorText+"{"+cssText+"}",position);
}
else if(typeof sheet.addRule!="undefined")//iE
{
sheet.addRule(selectorText,cssText,position);//sheet.addRule("body","background:red",)
}
};
//移除link或style的css规则,不常用
Base.prototype.addRule=function(num,index) //调用方法， $().removeRule(0);
{
var sheet=document.styleSheets[num];
if(typeof sheet.deleteRule!="undefined")//w3c
{
sheet.deleteRule(index);
}
else if(typeof sheet.removeRule!="undefined")//iE
{
sheet.removeRule(index);//sheet.addRule("body","background:red",)
}
};
//设置hover方法
Base.prototype.hover=function(over,out)
{
for(var i=0;i {
// this.elements[i].onmouseover=over;
// this.elements[i].onmouseout=out;
addEvent(this.elements[i],"mouseover",over);
addEvent(this.elements[i],"mouseout",out)
}
return this;
};
//添加show
Base.prototype.show=function()
{
for(var i=0;i {
this.elements[i].style.display="block"


}
return this;
};
//添加hide
Base.prototype.hide=function()
{
for(var i=0;i {
this.elements[i].style.display="none"


}
return this;
};
//设置物体居中
Base.prototype.center=function(width,height)
{
var top=(getInner().height-width)/2;
var left=(getInner().width-height)/2;
for(var i=0;i {
this.elements[i].style.top=top+"px";
this.elements[i].style.left=left+"px";
}
return this;
};
//触发浏览器窗口事件
Base.prototype.resize = function (fn) {
for(var i=0;i {
var element=this.elements[i];
/* window.onresize=function()
{
fn();
if (element.offsetLeft > getInner().width - element.offsetWidth) {
element.style.left = getInner().width - element.offsetWidth + 'px';
}
if (element.offsetTop > getInner().height - element.offsetHeight) {
element.style.top = getInner().height - element.offsetHeight + 'px';
}
}*/
addEvent(window,"resize",function()
{
fn();
if (element.offsetLeft > getInner().width - element.offsetWidth) {
element.style.left = getInner().width - element.offsetWidth + 'px';
}
if (element.offsetTop > getInner().height - element.offsetHeight) {
element.style.top = getInner().height - element.offsetHeight + 'px';
}
})
}
return this;
};
//锁屏功能
Base.prototype.lock=function()
{
for(var i=0;i {
this.elements[i].style.width=getInner().width+"px";
this.elements[i].style.height=getInner().height+"px";
this.elements[i].style.display="block";
document.documentElement.style.overflow = 'hidden';
addEvent(window,"scroll",scrollTop);
}


return this;
};
function scrollTop(){
document.documentElement.scrollTop=0;// IE W3C
document.body.scrollTop=0;//火狐
}
Base.prototype.unlock=function()
{
for(var i=0;i {
this.elements[i].style.display="none";
document.documentElement.style.overflow = 'auto';
removeEvent(window,"scroll",scrollTop);
}


return this;
};
//插件入口
Base.prototype.extend=function(name,fn)
{
Base.prototype[name]=fn;
};


$().extend("bbb",function(){
alert("123")
});