javascript在不同浏览器中的类型测试实验(跨浏览器编程要注意了！！)

为了测试javascript中typeof和Object.prototype.toString的各个native object在不同的浏览器的运行结果，特写了以下的测试代码：

var def;
var gPrimitiveType = {
'string':'str',
'boolean':true,
'function':function(){},
'object':{},
'array':[],
'undefined':def
};

var ul = $('content');
QQVIP.object.each(gPrimitiveType, function(value,key){

var child = document.createElement('LI');
var text = 'typeof ' + key + ' is:' + (typeof value);
child.appendChild(document.createTextNode(text));
ul.appendChild(child);

});

var gProtoType = {
'String.prototype':String.prototype,
'Function.prototype':Function.prototype,
'Object.prototype':Object.prototype,
'Array.prototype':Array.prototype,
'Date.prototype':Date.prototype,
'RegExp.prototype':RegExp.prototype
};

var ul = $('typelist');
QQVIP.object.each(gProtoType, function(value,key){

var child = document.createElement('LI');
var text = 'Object.prototype.toString.call( ' + key + ') is:' + (Object.prototype.toString.call(value) );
child.appendChild(document.createTextNode(text));
ul.appendChild(child);

});



下面是在各个浏览器下的运行结果：

1，IE6下：

typeof 运算结果：

typeof string is:string

typeof boolean is:boolean

typeof function is:function

typeof object is:object

typeof array is:object

typeof undefined is:undefined

Object.prototype.toString.call() 运算结果：

Object.prototype.toString.call( String.prototype) is:[object Object]

Object.prototype.toString.call( Function.prototype) is:[object Function]

Object.prototype.toString.call( Object.prototype) is:[object Object]

Object.prototype.toString.call( Array.prototype) is:[object Array]

Object.prototype.toString.call( Date.prototype) is:[object Date]

Object.prototype.toString.call( RegExp.prototype) is:[object RegExp]

二，Firefox3.0.15

typeof 运算结果：

typeof string is:string

typeof boolean is:boolean

typeof function is:function

typeof object is:object

typeof array is:object

typeof undefined is:undefined

Object.prototype.toString.call() 运算结果：

Object.prototype.toString.call( String.prototype) is:[object String]

Object.prototype.toString.call( Function.prototype) is:[object Function]

Object.prototype.toString.call( Object.prototype) is:[object Object]

Object.prototype.toString.call( Array.prototype) is:[object Array]

Object.prototype.toString.call( Date.prototype) is:[object Date]

Object.prototype.toString.call( RegExp.prototype) is:[object RegExp]

三，Chrome4.0

typeof 运算结果：

typeof string is:string

typeof boolean is:boolean

typeof function is:function

typeof object is:object

typeof array is:object

typeof undefined is:undefined

Object.prototype.toString.call() 运算结果：

Object.prototype.toString.call( String.prototype) is:[object String]

Object.prototype.toString.call( Function.prototype) is:[object Function]

Object.prototype.toString.call( Object.prototype) is:[object Object]

Object.prototype.toString.call( Array.prototype) is:[object Array]

Object.prototype.toString.call( Date.prototype) is:[object Date]

Object.prototype.toString.call( RegExp.prototype) is:[object Object]

四：Opera9.20

typeof 运算结果：
typeof string is:string
typeof boolean is:boolean
typeof function is:function
typeof object is:object
typeof array is:object
typeof undefined is:undefined
Object.prototype.toString.call() 运算结果：
Object.prototype.toString.call( String.prototype) is:[object String]
Object.prototype.toString.call( Function.prototype) is:[object Function]
Object.prototype.toString.call( Object.prototype) is:[object Object]
Object.prototype.toString.call( Array.prototype) is:[object Array]
Object.prototype.toString.call( Date.prototype) is:[object Date]
Object.prototype.toString.call( RegExp.prototype) is:[object RegExp]



五，Safari3.1.2

typeof 运算结果：

typeof string is:string

typeof boolean is:boolean

typeof function is:function

typeof object is:object

typeof array is:object

typeof undefined is:undefined

Object.prototype.toString.call() 运算结果：

Object.prototype.toString.call( String.prototype) is:[object String]

Object.prototype.toString.call( Function.prototype) is:[object Function]

Object.prototype.toString.call( Object.prototype) is:[object Object]

Object.prototype.toString.call( Array.prototype) is:[object Array]

Object.prototype.toString.call( Date.prototype) is:[object Date]

Object.prototype.toString.call( RegExp.prototype) is:[object RegExpPrototype]



综上，标红部分都是跟其他不一样的，需要充分注意。