avalon2
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an elegant efficient express mvvm framework
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#006样式操作
#006STYLE
avalon2的ms-css的变革思路与ms-attr一样，将多个操作合并成到一个对象里面处理，因此没有ms-css-name="value"，只有ms-css="Object"或ms-css="Array".
avalon2 redesigned `ms-css` in a same way as `ms-attr`,gather all your css values into one single object,so there is `ms-css-name="value"` no more,only `ms-css=Object"` or `ms-css=Array` will work properly.
注意，当你用对象字面量的方式传参时，注意存在－号的键名要用“”号括起来。
pelease pay attention to this,while your css object propertie names contain a hyphen,be aware to use a pair of double quotation marks to include this property,because hyphen marks are illegal being property names
`<div ms-css="{font-size: @fs}"></div>`
这个会报错.正确写法是以下两种
it's a wrong example,these two below are correct
`<div ms-css="{fontSize: @fs}"></div>`
`<div ms-css="{'font-size': @fs}"></div>`
在avalon1.*系列，允许你在属性值中加入插值表达式，如
in avalon1.* series,it allows you to insert a Interpolation expression into directive value,such as
`ms-css-width=”prop”(会自动补px)，ms-css-height=”{{prop}}%”, ms-css-color=”prop”, ms-css-background-color=”prop”, ms-css-font-size=”{{prop}}px`
`ms-css-width=”prop”(avalon will add `px` for you )，ms-css-height=”{{prop}}%”, ms-css-color=”prop”, ms-css-background-color=”prop”, ms-css-font-size=”{{prop}}px`
这些在avalon2中都不支持，它顶多帮你的样式加上厂商前缀，驼峰化，对数字属性加上px。
this featrue is no more supported in avalon2, the framework only correct your style name and add `px` for number values.
`<div ms-css="[{width:@width, height: @height+'px', color: @color, backgroundColor:@bg}, @otherStyleObject, @thirdStyleObject]"></div>`
```
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<script src="./dist/avalon.js"></script>
<script>
var vm = avalon.define({
$id: "test",
background: "red"
})
</script>
</head>
<body>
<div ms-controller="test">
<div style="width:200px; height:50px"
ms-css="{background: @background}">
</div>
<select ms-duplex="@background">
<option value="red">红</option>
<option value="yellow">黄</option>
<option value="green">绿</option>
</select>
</div>
</body>
</html>
```
我们来看另一个动画效果：
another animation example
```
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script src="./dist/avalon.js" ></script>
<script>
var vm = avalon.define({
$id: "test",
percent: 0
})
var a = true
var id = setInterval(function() {
if (a) {
if (vm.percent < 100) {
vm.percent++
} else {
a = false
}
} else {
if (vm.percent > 0) {
vm.percent--
} else {
a = true
}
}
}, 100)
</script>
<style>
.handerx{
width:20px;
height:20px;
position: absolute;
color:#fff;
background: #000;
}
.sliderx{
width:100%;
height:20px;
position: relative;
}
.body{
padding:40px;
}
</style>
</head>
<body ms-controller="test" class="body">
<div class="slider" style="background:red;">
<div class="handerx" ms-css="{left: @percent+'%'}" >{{ @percent }}</div>
<div style="background: greenyellow;height:20px" ms-css="{width:@percent+'%'}"></div>
</div>
<div class="sliderx" style="background:#d2d2d2;">
<div style="background: #2FECDC;height:20px" ms-css="{width:100-@percent+'%'}"></div>
</div>
</body>
</html>
```
最后看一下与ms-duplex结合使用的例子
a example using `ms-duplex`
```
<html>
<head>
<title>ms-css</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<script src="./dist/avalon.js" ></script>
<script>
var vm = avalon.define({
$id: "test",
w: 100,
h: 100,
click: function () {
vm.w = vm.w + 10;
vm.h = vm.h + 10;
}
})
</script>
</head>
<body>
<div ms-controller="test">
<div style=" background: #a9ea00;" ms-css='{width:@w,height:@h}' ms-click="@click"></div>
<p>{{ @w }} x {{ @h }}</p>
<!--change过滤器相当于原来data-duplex-event='change'-->
<p>W: <input type="text" ms-duplex-number="@w|change" /></p>
<p>H: <input type="text" ms-duplex-number="@h" /></p>
</div>
</body>
</html>
```
如果读者一口气看了N篇教程，建议马上到GITHUB里下avalon.js 的源码，动手试试。多看不如多码，那样才是成功的学习方式。
Thank you for reading all these 6 lessons,I strongly suggest you to download avalon.js file and try to make some your own examples.Coding is much better than reading only,that is a successful way of learning.