Vue advanced (12:28): Vue slot: slot, slot scope and instruction V-slot

No Silver Bullet 2020-11-13 07:29:08
vue advanced vue slot slot


In the early post 《Vue Advanced ( One twenty seven ):Vue slot 》 It mainly explains Vue Basic usage of slots in , The next part of this post is about the adoption of the high version v-slot How instructions are applied Vue Slot and with slotslot-scope Differences in usage .

demo

Anonymous slot

<body>
<div id="app">
<Test>
<div>slot Slot occupancy content </div>
</Test>
</div>
<template id="test">
<div>
<slot></slot>// Define slots
<h3> Here is test Components </h3>
</div>
</template>
</body>
<script>
Vue.component('Test',{
template:"#test"
});
new Vue({
el:"#app",
})
</script>

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A named slot

<body>
<div id="app">
<Test>
<div slot="header"> Here is the head </div>// A named slot uses
<div slot="footer"> Here's the tail </div>
</Test>
</div>
<template id="test">
<div>
<slot name="header"></slot>// A named slot
<h3> Here is Test Components </h3>
<slot name="footer"></slot>
</div>
</template>
</body>
<script>
Vue.component(
'Test',{
template:"#test"
});
new Vue({
el:"#app"
})
</script>

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v-slot

v-slot Use in components slot When occupying space , Also in slot Use in label name Attribute to slot Slot defines a name . But in html It's a little different when used inside . Need to use template Template tags ,template tag , Use v-slot Instruction binding slot name , Write the content to be added in the tag .

<body>
<div id="app">
<Test>
<template v-slot:header>//v-slot Instructions use slots
<h2>slot Head content </h2>
</template>
<p> Insert the content of the component directly </p>
<template v-slot:footer>
<h2>slot Tail content </h2>
</template>
</Test>
</div>
<template id ='test'>
<div class="container">
<header>
<!-- We want to put the header here -->
<slot name = "header"></slot>// A named slot
</header>
<section>
The main content part
</section>
<footer>
<!-- We want to put the footer here -->
<slot name = 'footer'></slot>
</footer>
</div>
</template>
</body>
<script>
Vue.component('Test',{
template:"#test"
});
new Vue({
el:"#app"
})
</script>

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Scope slot :
slot-scope Use :

  1. Write the required... In the component template slot slot , And pass the data of the current component through v-bind Binding in slot On the label .

  2. When components are used , adopt slot-scope=“scope”, In the receiving component slot Data bound to the tag .

  3. adopt scope.xxx You can use the binding data

<body>
<div id="app">
<Test>
<div slot="default" slot-scope="scope">// Scope slot usage (slot-scope)
{
{ scope.msg }}
</div>
</Test>
</div>
<template id="test">
<div>
<slot name="default" :msg="msg"> </slot>
<p> Here is test Components </p>
</div>
</template>
</body>
<script>
new Vue({
el:"#app",
components:{
'Test':{
template:"#test",
data(){
return {
msg:" Hello "
}
},
}
}
})
</script>

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Scope slot :v-slot Usage of

<body>
<div id="app">
<Test>
<template v-slot:header="scope">//v-slot Define scope slots
<div>
<h3>slot</h3>
<p> {
{scope.msg}} </p>
</div>
</template>
</Test>
</div>
<template id="test">
<div>
<slot name="header":msg="msg"></slot>
<p> Here is test Components </p>
</div>
</template>
</body>
<script>
Vue.component('Test',{
template:"#test",
data(){
return {
msg:' Here is the head '
}
}
});
new Vue({
}).$mount("#app")
</script>

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Vue2.6.0 Use in v-slot Instructions take the place of special features slot And slot-scope, But it can be seen from the above cases that ,v-slot When use , Need to be in template tag , We should pay attention to this point in the application .

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