javascript基础01

javascript学习
1
对象格式
一
var car = new Object();
car.colour = 'red';
car.wheels = 4;
car.hubcaps = 'spinning';
car.age = 4;
二
var car = {
colour:'red',
wheels:4,
hubcaps:'spinning',
age:4
}
2
数组格式
一
var moviesThatNeedBetterWriters = new Array(
'Transformers','Transformers2','Avatar','Indiana Jones 4'
);
二
var moviesThatNeedBetterWriters = [
'Transformers','Transformers2','Avatar','Indiana Jones 4'
];
三
var car = new Array();
car['colour'] = 'red';
car['wheels'] = 4;
car['hubcaps'] = 'spinning';
car['age'] = 4;
3
用三重标记法可以写成：
var direction = x < 200 ? 1 : --1;
4
json格式
var band = {
"name":"The Red Hot Chili Peppers",
"members":[
{
"name":"Anthony Kiedis",
"role":"lead vocals"
},
{
"name":"Michael 'Flea' Balzary",
"role":"bass guitar, trumpet, backing vocals"
},
{
"name":"Chad Smith",
"role":"drums,percussion"
},
{
"name":"John Frusciante",
"role":"Lead Guitar"
}
],
"year":"2009"
}

5 调用javascript中的自定义函数
一
1 通过js中的事件调用自定义函数
2
定义函数
<script>
function aaa(){
alert("sssssss");
}
</script>

使用函数
<script>
aaa();
</script>
3 直接使用自定义函数
<script>
(function aaa(){
alert("sssssss");
})();
</script>
二
函数定义
1使用json
<div id="delicious"></div><script>
function delicious(o){
var out = '<ul>';
for(var i=0;i<o.length;i++){
out += '<li><a href="' + o[i].u + '">' +
o[i].d + '</a></li>';
}
out += '</ul>';
document.getElementById('delicious').innerHTML = out;
}
</script>
2 添加类
function addclass(elm,newclass){
var c = elm.className;
elm.className = (c === '') ? newclass : c+' '+newclass;
}

可以运用split()和join()函数来自动实现：
function addclass(elm,newclass){
var classes = elm.className.split(' ');
classes.push(newclass);
elm.className = classes.join(' ');
}

3添加事件
(function(){
var resources = document.getElementById('resources');
resources.addEventListener('click',handler,false);
function handler(e){
var x = e.target; // get the link tha
if(x.nodeName.toLowerCase() === 'a'){
alert('Event delegation:' + x);
e.preventDefault();
}
};
})();

没看懂：
以调用createMember()
或getMemberDetails()函数，将它们作为myApplication的属性返回
。
var myApplication = function(){
var name = 'Chris';
var age = '34';
var status = 'single';
return{
createMember:function(){
// [...]
},
getMemberDetails:function(){
// [...]
}
}
}();
// myApplication.createMember() and
// myApplication.getMemberDetails() now works.
这样的用法被称为模块模式或单例模式。

var myApplication = function(){
var name = 'Chris';
var age = '34';
var status = 'single';
function createMember(){
// [...]
}
function getMemberDetails(){
// [...]
}
return{
create:createMember,
get:getMemberDetails
}
}();
//myApplication.get() and myApplication.create() now work.
我将这种方法称为“揭示模块模式”。