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2.¶ÔÕâ¸öHTMLÔªËØÖ´ÐеIJÙ×÷µÄ·½·¨
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(function(){
//Use a private class
function _$(els){
this.elements = [];
for(var i=0; i<els.length; i++){
var element = els[i];
if(typeof element === "string"){
element = document.getElementById(element);
}
this.elements.push(element);
}
}
//
_$.prototype = {
each : function(fn){
for(var i=0; i<this.elements.length; i++){
fn.call(this,this.elements[i]);
}
return this;
},
setStyle : function(prop,val){
this.each(function(el){
el.style[prop] = val;
});
return this;
},
show : function(){
var that = this;
this.each(function(el){
that.setStyle("display","bloc");
});
return this;
},
addEvent : function(type,fn){
var add = function(el){
if(window.addEventListener){
el.addEventListener(type,fn,false);
}
else if(window.attachEvent){
el.attachEvent("on"+type,fn);
}
}
this.each(function(el){
add(el);
})
return this;
}
};
//the public interface remains the same
window.$ = function(){
return new _$(arguments);
}
})()

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window.API2 = window.API2 || function(){
var name = "hell";
this.setName = function(newName){
name = newName;
return this;
};
this.getName = function(callback){
callback.call(this,name);
return this;
}
};
var o2 = new API2;
o2.getName(console.log).setName("Menw").getName(console.log);