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锁定老帖子 主题：ECMAScript5 新特性(一)
精华帖 (1) :: 良好帖 (4) :: 新手帖 (12) :: 隐藏帖 (1)
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发表时间：2011-01-24
即使是ie6，很多html5的功能还是可以用的
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发表时间：2011-01-25
这个 ECMAScript5 在09年12月份就发布， 怎么给弄成10年12月了？
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发表时间：2011-01-25
现在项目在需求阶段就应该向客户指明：IE7以上版本。。。。我们就是这么搞的
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发表时间：2011-01-25
还是不爽，如果能这么些写就好了
var objDefinition = { "test" : function(){} };var instance = new objDefinition();
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发表时间：2011-01-25
我靠 知音啊 |
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发表时间：2011-01-25
rainsilence 写道 即使是ie6，很多html5的功能还是可以用的
---------- 我倒觉得完全不可用，倒是好事。早点淘汰。 |
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发表时间：2011-01-25
rainsilence 写道 即使是ie6，很多html5的功能还是可以用的
VML 而已 |
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发表时间：2011-01-25
能实现功能就行
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发表时间：2011-01-28
改自OpenLayers框架... Class = function() {
var len = arguments.length;
var P = arguments[0];
var F = arguments[len - 1];
var C = typeof F.initialize == "function" ? F.initialize : function() {
P.apply(this, arguments);
};
if (len > 1) {
var newArgs = [ C, P ].concat(Array.prototype.slice.call(arguments)
.slice(1, len - 1), F);
inherit.apply(null, newArgs);
} else {
C.prototype = F;
C.prototype.superclass = [];
}
if(C.prototype.tsuperclass){
C.prototype.superclass = C.prototype.tsuperclass;
delete C.prototype.tsuperclass;
}
return C;
}
inherit = function(C, P) {
var F = function() {
};
F.prototype = P.prototype;
C.prototype = new F;
C.prototype.tsuperclass = [];
addUnique(C.prototype.tsuperclass, P);
var i, l, o;
for (i = 2, l = arguments.length; i < l; i++) {
o = arguments[i];
//strict equal
if (typeof o === "function") {
addUnique(C.prototype.tsuperclass, o);
o = o.prototype;
}
extend(C.prototype, o);
}
};
extend = function(destination, source) {
destination = destination || {};
if(source) {
for(var property in source) {
var value = source[property];
if(value !== undefined) {
destination[property] = value;
}
}
/**
* IE doesn't include the toString property when iterating over an object's
* properties with the for(property in object) syntax. Explicitly check if
* the source has its own toString property.
*/
/*
* FF/Windows < 2.0.0.13 reports "Illegal operation on WrappedNative
* prototype object" when calling hawOwnProperty if the source object
* is an instance of window.Event.
*/
var sourceIsEvt = typeof window.Event == "function"
&& source instanceof window.Event;
if(!sourceIsEvt
&& source.hasOwnProperty && source.hasOwnProperty('toString')) {
destination.toString = source.toString;
}
}
return destination;
};
addUnique = function(current, obj){
if(!current||!obj){
return;
}
if(Kay.Util.indexOf(current, obj) != -1){
return;
}
current.push(obj);
};
有了以上四个方法, 就可以这样定义类了
var Dog = Class({
name:null, bite:function(another){
console.debug(this.name + ' bite ' + another.name + ' !');
},
getFeatures:function(){
return '两只眼睛, 四只脚, 一条尾巴, 一张嘴';
},
initialize:function(options){
extendz(options, this);
//init
}
});
var JAPADog = Class(Dog, {
from:'鸡国',
getFeatures:function(){
return Dog.prototype.apply(this, arguments) + (this.from + '的');
}
});
var doga = new Dog({name:'小犬惷一郞'});
var dogb = new JAPADog({name:'小犬笨二郞'});
doga.bite(dogb);
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发表时间：2011-01-28
adaikiss 写道
改自OpenLayers框架... Class = function() {
var len = arguments.length;
var P = arguments[0];
var F = arguments[len - 1];
var C = typeof F.initialize == "function" ? F.initialize : function() {
P.apply(this, arguments);
};
if (len > 1) {
var newArgs = [ C, P ].concat(Array.prototype.slice.call(arguments)
.slice(1, len - 1), F);
inherit.apply(null, newArgs);
} else {
C.prototype = F;
C.prototype.superclass = [];
}
if(C.prototype.tsuperclass){
C.prototype.superclass = C.prototype.tsuperclass;
delete C.prototype.tsuperclass;
}
return C;
}
inherit = function(C, P) {
var F = function() {
};
F.prototype = P.prototype;
C.prototype = new F;
C.prototype.tsuperclass = [];
addUnique(C.prototype.tsuperclass, P);
var i, l, o;
for (i = 2, l = arguments.length; i < l; i++) {
o = arguments[i];
//strict equal
if (typeof o === "function") {
addUnique(C.prototype.tsuperclass, o);
o = o.prototype;
}
extend(C.prototype, o);
}
};
extend = function(destination, source) {
destination = destination || {};
if(source) {
for(var property in source) {
var value = source[property];
if(value !== undefined) {
destination[property] = value;
}
}
/**
* IE doesn't include the toString property when iterating over an object's
* properties with the for(property in object) syntax. Explicitly check if
* the source has its own toString property.
*/
/*
* FF/Windows < 2.0.0.13 reports "Illegal operation on WrappedNative
* prototype object" when calling hawOwnProperty if the source object
* is an instance of window.Event.
*/
var sourceIsEvt = typeof window.Event == "function"
&& source instanceof window.Event;
if(!sourceIsEvt
&& source.hasOwnProperty && source.hasOwnProperty('toString')) {
destination.toString = source.toString;
}
}
return destination;
};
addUnique = function(current, obj){
if(!current||!obj){
return;
}
if(Kay.Util.indexOf(current, obj) != -1){
return;
}
current.push(obj);
};
有了以上四个方法, 就可以这样定义类了
var Dog = Class({
name:null, bite:function(another){
console.debug(this.name + ' bite ' + another.name + ' !');
},
getFeatures:function(){
return '两只眼睛, 四只脚, 一条尾巴, 一张嘴';
},
initialize:function(options){
extendz(options, this);
//init
}
});
var JAPADog = Class(Dog, {
from:'鸡国',
getFeatures:function(){
return Dog.prototype.apply(this, arguments) + (this.from + '的');
}
});
var doga = new Dog({name:'小犬惷一郞'});
var dogb = new JAPADog({name:'小犬笨二郞'});
doga.bite(dogb);
A！B！C！openlayer会把代码改的这么恶心？？
另外，如果要实现继承，向上转型判断，以及自动调用父类函数请参照我的其他博客，比如：
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