完整原文地址见简书https://www.jianshu.com/p/cdbd2670e075
更多完整Vue笔记目录敬请见《前端 Web 笔记 汇总目录(Updating)》
本文内容提要
Class样式写法
常规
的样式使用写法- 使用
v-bind
的形式动态设定DOM组件样式- 使用
v-bind
+Object
的形式组织样式 绑定DOM组件;- 使用
v-bind
+数组
的形式组织样式 绑定DOM组件数组
形式中混合Object
形式的;子组件样式 默认跟随 父组件
- 子组件自己配置样式,则不跟随根组件,按子组件自己的样式渲染
- 拥有“两个以上最外层组件”的样式处理
- 解决办法1,
外层组件 各自配置样式
;- 解决办法2,使用
:class="$attrs.class"
对外层组件进行配置,
使得统一跟随引用处样式配置;行内样式写法
常规
写法- Vue式写法,使用
v-bind
配合dataObject
形式描述样式,可读性更高
Class样式写法
常规的样式使用写法:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Hello World! heheheheheheda</title>
<style>
.blue {
color: blue;
}
.green {
color: green;
}
</style>
<script src="https://unpkg.com/vue@next"></script>
</head>
<body>
<div id="heheApp"></div>
</body>
<script>
const app = Vue.createApp({
template: `
<div class = "blue">luelueluelielielie</div>`
});
const vm = app.mount('#heheApp');
</script>
</html>
效果:
使用v-bind
的形式动态设定DOM组件样式:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Hello World! heheheheheheda</title>
<style>
.blue {
color: blue;
}
.green {
color: green;
}
</style>
<script src="https://unpkg.com/vue@next"></script>
</head>
<body>
<div id="heheApp"></div>
</body>
<script>
const app = Vue.createApp({
data() {
return {
colorString:'blue',
}
},
template: `
<div :class = "colorString">luelueluelielielie</div>`
});
const vm = app.mount('#heheApp');
</script>
</html>
改变data字段
可以动态改变组件颜色:
使用Object
的形式组织样式 绑定DOM组件:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Hello World! heheheheheheda</title>
<style>
.blue {
color: blue;
}
.green {
color: green;
}
</style>
<script src="https://unpkg.com/vue@next"></script>
</head>
<body>
<div id="heheApp"></div>
</body>
<script>
const app = Vue.createApp({
data() {
return {
colorObject: {blue:true, green:true}
}
},
template: `
<div :class = "colorObject">luelueluelielielie</div>`
});
const vm = app.mount('#heheApp');
</script>
</html>
关键代码:
data() {
return {
colorObject: {blue:true, green:true}
}
},
效果如下:
如果将颜色键值设置成false
,则网页DOM组件便不会展示:
<script>
const app = Vue.createApp({
data() {
return {
colorObject: {blue:true, green:false}
}
},
template: `
<div :class = "colorObject">luelueluelielielie</div>`
});
const vm = app.mount('#heheApp');
</script>
效果:
使用数组
的形式组织样式 绑定DOM组件:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Hello World! heheheheheheda</title>
<style>
.blue {
color: blue;
}
.green {
color: green;
}
.orange {
color: orange;
}
.yellow {
color: yellow;
}
</style>
<script src="https://unpkg.com/vue@next"></script>
</head>
<body>
<div id="heheApp"></div>
</body>
<script>
const app = Vue.createApp({
data() {
return {
colorArray: ['blue', 'green', 'orange', 'yellow']
}
},
template: `
<div :class = "colorArray">luelueluelielielie</div>`
});
const vm = app.mount('#heheApp');
</script>
</html>
效果:
数组
形式中混合Object
形式的:
<script>
const app = Vue.createApp({
data() {
return {
colorArray: ['blue', 'green', {orange:false, yellow:true}]
}
},
template: `
<div :class = "colorArray">luelueluelielielie</div>`
});
const vm = app.mount('#heheApp');
</script>
效果:
子组件样式 默认跟随 父组件
例程:
添加子组件testDom
到根组件,子组件样式没有配置,则默认跟随根组件:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Hello World! heheheheheheda</title>
<style>
.blue {
color: blue;
}
.green {
color: green;
}
.orange {
color: orange;
}
</style>
<script src="https://unpkg.com/vue@next"></script>
</head>
<body>
<div id="heheApp"></div>
</body>
<script>
const app = Vue.createApp({
data() {
return {
colorArray: ['blue', 'green', {orange:true}]
}
},
template: `
<div :class = "colorArray">
luelueluelielielie
<testDom/>
</div>`
});
app.component('testDom', {
template: `
<div>heheda</div>`
});
const vm = app.mount('#heheApp');
</script>
</html>
运行效果:
子组件自己配置样式,则不跟随根组件,按子组件自己的样式渲染:
<script>
const app = Vue.createApp({
data() {
return {
colorArray: ['blue', 'green', {orange:true}]
}
},
template: `
<div :class = "colorArray">
luelueluelielielie
<testDom/>
</div>`
});
app.component('testDom', {
template: `
<div class='blue'>heheda</div>`
});
const vm = app.mount('#heheApp');
</script>
拥有“两个以上最外层组件”的样式处理
不过当添加的子组件的template
中,最外层有两个以上的组件的时候,
在引用子组件处(如下代码中的<testDom class='green'/>
)配置样式是没有作用,
子组件template
下的组件 会沿用根组件的样式(如下代码中的<div :class = "colorArray">
),
因为引用处<testDom class='green'/>
配置的样式 或者其他属性,
指代的是testDom
组件的最外层组件
的样式 或者其他属性,
但是此时最外层组件
有两个,
于是这个样式class='green'
配置不知道该分配给哪个最外层组件
,便失效:
<script>
const app = Vue.createApp({
data() {
return {
colorArray: ['blue', 'green', {orange:true}]
}
},
template: `
<div :class = "colorArray">
luelueluelielielie
<testDom class='green'/>
</div>`
});
app.component('testDom', {
template: `
<div>heheda</div>
<div>heheda</div>
`
});
const vm = app.mount('#heheApp');
</script>
解决办法1,各自配置样式:
<script>
const app = Vue.createApp({
data() {
return {
colorArray: ['blue', 'green', {orange:true}]
}
},
template: `
<div :class = "colorArray">
luelueluelielielie
<testDom/>
</div>`
});
app.component('testDom', {
template: `
<div class='blue'>heheda</div>
<div class='green'>heheda</div>
`
});
const vm = app.mount('#heheApp');
</script>
解决办法2,使用:class="$attrs.class"
对外层组件进行配置,
将自定义子组件 template下的组件 的样式,
跟随 子组件添加处(如下代码中的<testDom class='green'/>
)配置的样式:
<script>
const app = Vue.createApp({
data() {
return {
colorArray: ['blue', 'green', {orange:true}]
}
},
template: `
<div :class = "colorArray">
luelueluelielielie
<testDom class='blue'/>
</div>`
});
app.component('testDom', {
template: `
<div :class="$attrs.class">heheda</div>
<div :class="$attrs.class">heheda</div>
`
});
const vm = app.mount('#heheApp');
</script>
运行效果:
行内样式写法
常规写法:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Hello World! heheheheheheda</title>
<style>
.blue {
color: blue;
}
.green {
color: green;
}
.orange {
color: orange;
}
</style>
<script src="https://unpkg.com/vue@next"></script>
</head>
<body>
<div id="heheApp"></div>
</body>
<script>
const app = Vue.createApp({
template: `
<div style="color:blue">
luelueluelielielie
</div>`
});
const vm = app.mount('#heheApp');
</script>
</html>
效果:
Vue式写法,使用v-bind
配合data,
老规矩,bind后接左边一个组件属性style
,右边一个data字段styleString
:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Hello World! heheheheheheda</title>
<style>
.blue {
color: blue;
}
.green {
color: green;
}
.orange {
color: orange;
}
</style>
<script src="https://unpkg.com/vue@next"></script>
</head>
<body>
<div id="heheApp"></div>
</body>
<script>
const app = Vue.createApp({
data() {
return {
styleString:'color:blue;'
}
},
template: `
<div :style="styleString">
luelueluelielielie
</div>`
});
const vm = app.mount('#heheApp');
</script>
</html>
效果一样:
Object形式描述样式
当然以上是string
方式描述样式的方式,
更多时候我们使用Object的形式描述样式,可读性更高
如下例程,
styleString
和styleObject
两个字段,
分别代表以上两种描述方式,相形见绌:
<script>
const app = Vue.createApp({
data() {
return {
styleString:'color:blue; background: orange',
styleObject: {
color: 'blue',
background:'orange'
}
}
},
template: `
<div :style="styleObject">
luelueluelielielie
</div>`
});
const vm = app.mount('#heheApp');
</script>
效果:
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