How to render a list of static content with Vue named slot?

问题

I have trouble figuring out how to get the following to work:

My parent template

<comp>
  <a href="#" slot="links>link 1</a>
  <a href="#" slot="links>link 2</a>
</comp>

and my component comp template looks like the following:

<ul class="comp">
  <li class="comp-item"><slot name="links"></slot></li>
</ul>

currently all my anchors goes to that single li tag (which is expected) but I would like to be able to produce multiple li for every named slot I inserted like the following:

<ul class="comp">
  <li class="comp-item"><a href="#" slot="links>link 1</a></li>
  <li class="comp-item"><a href="#" slot="links>link 2</a></li>
</ul>

Is there any way to achieve what I need without using scoped slot? Because my content is pure HTML so I feel it is unnecessary to put static content inside prop in order to render them.

From what I have seen, most vue UI framework requires you to use another custom component for the list item, which I feel is over killed for the problem. Is there any other way to do this?

回答1:

This is easily accomplished with a render function.

Vue.component("comp", {
  render(h){
    let links = this.$slots.links.map(l => h('li', {class: "comp-item"}, [l]))
    return h('ul', {class: 'comp'}, links)
  }
})

Here is a working example.

console.clear()

Vue.component("comp", {
  render(h){
    let links = this.$slots.links.map(l => h('li', {class: "comp-item"}, [l]))
    return h('ul', {class: 'comp'}, links)
  }
})

new Vue({
  el: "#app"
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.13/vue.js"></script>
<div id="app">
  <comp>
    <a href="#" slot="links">link 1</a>
    <a href="#" slot="links">link 2</a>
  </comp>
</div>

Or with the help of a small utility component for rendering vNodes you could do it like this with a template.

Vue.component("vnode", {
  functional: true,
  render(h, context){
    return context.props.node
  }
})

Vue.component("comp", {
  template: `
    <ul class="comp">
      <li class="comp-item" v-for="link in $slots.links"><vnode :node="link" /></li>
    </ul>
  `
})

new Vue({
  el: "#app"
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.13/vue.js"></script>
<div id="app">
  <comp>
    <a href="#" slot="links">link 1</a>
    <a href="#" slot="links">link 2</a>
  </comp>
</div>

回答2:

You can make use of scoped slots instead of slots

Your comp component receives a prop links which is an array of links(since static initialized as a custom option). Iterate over the links and pass link as data to the slot just like passing props to a component

   Vue.component("comp", {
  template: `
    <ul class="comp">
      <li class="comp-item" v-for="link in links">
          <slot v-bind="link"></slot>
      </li>
    </ul>
  `,
  props: ["links"]
})

new Vue({
  el: "#app",
  // custom static option , accessed using vm.$options.links
  links: [
      {text: "link1"},
      {text: "link2"},
      {text: "lin3"}
  ]
})

In the parent where the comp component is used make use of a <template> element with a special attribute slot-scope , indicating that it is a template for a scoped slot.

The value of slot-scope will be used as the name of a temporary variable that holds the props object passed from the child:

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.13/vue.js"></script>
<div id="app">
  <comp :links="$options.links">
      <template slot-scope="link">
          <a href="#">{{link.text}}</a>
      </template>
  </comp>
</div>

Here is the working fiddle

回答3:

If you don't like to put your data in array, and render list with v-for

You can put all of them in the component, no slot:

<ul class="comp">
  <li class="comp-item"><a href="#">link 1</a></li>
  <li class="comp-item"><a href="#">link 2</a></li>
</ul>

or with slot:

<comp>
  <ul class="comp" slot="links">
    <li class="comp-item"><a href="#">link 1</a></li>
    <li class="comp-item"><a href="#">link 2</a></li>
  </ul>
</comp>

来源：https://stackoverflow.com/questions/48975136/how-to-render-a-list-of-static-content-with-vue-named-slot