Vue props 單向數據流
阿新 • • 發佈:2017-12-18
war component tle wid -s round 組件 spa 內容
1、props通信
註意:DOM模板的駝峰命名props要轉為短橫分割命名。
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8" />
<title>Vue</title>
</head>
<body>
<div id="app">
<my-component message=‘來自父組件的數據‘ warning-text="提示信息"></my-component>
</div>
<script src="https://cdn.bootcss.com/vue/2.5.9/vue.min.js"></script>
<script type="text/javascript">
Vue.component(‘my-component‘, {
template: ‘<div>{{warningText}}:{{message}}</div> ‘,
props: [‘message‘, ‘warningText‘]
})
new Vue({
el: "#app"
})
</script>
</body>
</html>
傳遞動態數據(v-bind):
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8" />
<title>Vue</title>
</head>
<body>
<div id="app">
<input type="text" v-model="parentMessage" />
<my-component :message=‘parentMessage‘></my-component>
</div>
<script src="https://cdn.bootcss.com/vue/2.5.9/vue.min.js"></script>
<script type="text/javascript">
Vue.component(‘my-component‘, {
template: ‘<div>{{message}}</div>‘,
props: [‘message‘]
})
new Vue({
el: "#app",
data: {
parentMessage: ‘‘
}
})
</script>
</body>
</html>
2、單向數據流
(1)子組件保存父組件傳遞過來的值,在子組件自己的作用域下修改和使用。
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8" />
<title>Vue</title>
</head>
<body>
<div id="app">
<my-component :init-count=‘1‘></my-component>
</div>
<script src="https://cdn.bootcss.com/vue/2.5.9/vue.min.js"></script>
<script type="text/javascript">
Vue.component(‘my-component‘, {
template: ‘<div>{{initCount}}</div>‘,
props: [‘initCount‘],
data: function() {
return this.initCount
}
})
new Vue({
el: "#app"
})
</script>
</body>
</html>
(2)使用計算屬性
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8" />
<title>Vue</title>
</head>
<body>
<div id="app">
<my-component :width=‘100‘></my-component>
</div>
<script src="https://cdn.bootcss.com/vue/2.5.9/vue.min.js"></script>
<script type="text/javascript">
Vue.component(‘my-component‘, {
template: ‘<div :style="style">組件內容</div>‘,
props: [‘width‘],
computed: {
style: function() {
return {
width: this.width + ‘px‘
}
}
}
})
new Vue({
el: "#app"
})
</script>
</body>
</html>
Vue props 單向數據流