# Vue2.6 新特性
# Vue.observable
<html>
<head>
<title>Vue.observable</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="root">
{{message}}
<button @click="change">Change</button>
</div>
<script>
const state = Vue.observable({ message: 'Vue 2.6' })
const mutation = {
setMessage(value) {
state.message = value
}
}
new Vue({
el: '#root',
computed: {
message() {
return state.message
}
},
methods: {
change() {
mutation.setMessage('Vue 3.0')
}
}
})
</script>
</body>
</html>
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# 插槽 slot
<html>
<head>
<title>插槽 slot</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="root">
<div>案例1：slot的基本用法</div>
<Test>
<template v-slot:header="{user}">
<div>自定义header({{user.a}})</div>
</template>
<template v-slot="{user}">
<div>自定义body({{user.b}})</div>
</template>
</Test>
</div>
<div id="root2">
<div>案例2：Vue2.6新特性 - 动态slot</div>
<Test>
<template v-slot:[section]="{section}">
<div>this is {{section}}</div>
</template>
</Test>
<button @click="change">switch header and body</button>
</div>
<script>
Vue.component('Test', {
template:
'<div>' +
'<slot name="header" :user="obj" :section="\'header\'">' +
'<div>默认header</div>' +
'</slot>' +
'<slot :user="obj" :section="\'body\'">默认body</slot>' +
'</div>',
data() {
return {
obj: { a: 1, b: 2 }
}
}
})
new Vue({ el: '#root' })
new Vue({
el: '#root2',
data() {
return {
section: 'header'
}
},
methods: {
change() {
this.section === 'header' ?
this.section = 'default' :
this.section = 'header'
}
}
})
</script>
</body>
</html>
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