avalon2
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an elegant efficient express mvvm framework
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#属性操作
#attributes manipulating
avalon2与avalon1的属性操作虽然都是使用ms-attr，但用法完全不一样。
avalon2 and avalon1 use `ms-attr` to manipulate attributes,but way of useing is exactly the different.
avalon1是这样操作属性的
avalon1 manipulate attributes like this
```
<div ms-attr-aaa='a' ms-attr-bbb='b' ms-attr-ccc='b'></div>
```
其语法为
the grammer is
```
ms-attr-valueName="vmProp"
```
有多少个属性就写多个ms-attr-。其中不能省略。此外，还存在ms-title, ms-alt，ms-src, ms-href, ms-selected, ms-checked等等缩略写法。但估计很少人知道，到底哪些属性可以缩写，哪些不能。
you have to write ms-attr-s as many as your wanting attributes.Besides,there are ms-title, ms-alt，ms-src, ms-href, ms-selected, ms-checked ETC abbreviated writing,but barely no people can know them all very well.
avalon2从减轻用户的记忆出发，将你要操作的属性全部打包成一个对象，并规定，只能属性值才能使用@开头的vm属性。此外，avalon2不存在ms-title这样的缩略写法。
avalon2 redesign this directive from the angle of easy membering using a single object to contain all of you attributes,and set a rule: only attribute values can reference @mark started VM properties。Besides,there are ms-title liked abbreviated writings no more.
<div ms-attr="{aaa:@a, bbb:@b+11, ccc: @fn(@d,@e)}"></div>
或者
or
```
<div ms-attr="@attrObj"></div>
```
attrObj为vm的一个对象属性，但这个不太常用。或者
attrObj is an object from VM properties.Or do it like this
```
<div ms-attr="[{@aaa:@a}, {bbb: @b}, @toggle ? {add:"111"}: {}]"></div>
```
ms-attr直接对应一个数组。这个灵感是来自ReactNative的style指令，它们可以通过数组，传入多个样式对象…………
ms-attr useing a Array.This is come from ReactNative's style diretive,it can pass multiple parameters using an Array.
不过无论你怎么搞，最后你传的东西能保持avalon内部能将它变回一个对象就行了。
Anyway,just make sure avalon can transform your data to a object and it will work.
有时你的对象很长，需要换行，avalon2也是支持的，即便你写得像以下这么恶心，avalon2还是能认出来。
Sometimes you hava many attributes and you want to wrap it,avalon2 support wraps well even in such a gross example.
```
<html>
<head>
<title>TODO supply a title</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width">
<script src="./dist/avalon.js"></script>
<script >
var vm = avalon.define({
$id: "test",
title:111,
src: "222",
lang: 333
})
</script>
</head>
<body ms-controller="test" >
<div aaa='ddd' bbb=333
ms-attr='{title: @title,
ddd:@src,
lang:@lang}' >{{
@src ? 333: 'empty'
}}</div>
<input ms-duplex="@src"/>
</body>
</html>
```
但为了性能起见，ms-attr最好还是保持在一行吧。
for the sake of performance,please keep ms-attr short in a single line