Rendering a custom Vue 3 component as a string and then passing it to another component as a prop

Question

Rendering a custom Vue 3 component as a string and then passing it to another component as a prop

Hey there coding mates!

Currently diving into Vue 3 and the composition API with setup.

I've been crafting a custom "Table" component to display... well, tables. It requires a prop named "data", which is an array of objects (representing rows) containing fields like title, data, and a render() function. With the render() function, my goal is to enable the rendering of custom HTML within any column as needed, be it multiple data points, personalized text, bespoke components, etc. However, I hit a roadblock when dealing with custom components.

Here's what I have so far:

Within the Table component, I iterate over <tr v-for>, cycling through props.data to render the columns. If it encounters a render() function, it passes row data to that function for rendering purposes. Here's an example of a render() function:

render(row) => {
   return `This is some random text and: <my-custom-component>${row.someData}</my-custom-component>`;
}

Below is a snippet of the Table component:

<tr v-for="group in tableData">
  <template v-for="column in props.columns">
     <td v-if="column.render">
         *** here I want to render whats inside render() function, including custom component ***
     </td>
     <td v-else :style="{ width: column.width ?? 'auto' }" v-html="group[column.data]"></td>
  </template>
</tr>

This part isn't functioning properly. I keep getting a Vue warning stating "Failed to resolve component". I attempted using a dynamic component in Vue:

<component is="myCustomComponent"></component>

Unfortunately, it ends up rendering pure HTML like this:

<mycustomcomponent></mycustomcomponent>

I've scoured the web for solutions but haven't come across one yet. While I saw examples involving the h() function, integrating it into my code has proven challenging.

Additionally, it's worth mentioning that I populate the table with data post fetching it from the API.

So, what am I overlooking? Is achieving this feat even feasible? Given my limited experience with Vue, it's highly likely that I'm missing some key concept.

javascript vue.js vuejs3 vue-composition-api

Answer 1

Answer №1

UPDATE

Encoding html in a text string to html using h() is not as straightforward as it seems.

The outcome will essentially be identical to placing the text string within double curly braces {{}} inside the template.

Take a look at the playground.

const { createApp, h } = Vue;

const MyCustomComp = {
  props: ['content'],
  setup(props) {
    return () => 
      h('div', null, props.content)
   }
}

const App = { components: { MyCustomComp } }
const app = createApp(App)
app.mount('#app')

#app { line-height: 2; }
[v-cloak] { display: none; }

<div id="app" v-cloak>
  <my-custom-comp :content="'<h1>Some Content</h1>'"></my-custom-comp>
  {{ '<h2>Some Other Content</h2>' }}
  <div v-html="'<h3>v-html does not work wuth custom components:</h3><MyCustomComp /><my-custom-comp></my-custom-comp>'"></div>
</div>
<script src="https://unpkg.com/vue@3/dist/vue.global.prod.js"></script>

You can utilize v-html to interpolate standard HTML, but it won't render the custom components correctly. Refer to the div with v-html.

I recommend exploring slots for your task as it would simplify the process significantly.

Alternatively, consider revising your design for a potentially simpler solution.

If not, you'll have to manually parse dynamic content from the text string and render it using the h() function, which presents a considerable challenge.

Check out my responses on Vue's Render Functions:

Adding custom HTML element inside a template using functions in Vue.js
Vue2 @click doesn't work with v-html in another component
Vue 3: How to use the render function to render different components that themselves render different components with slots, events, etc?

It's definitely feasible, and I'm confident that employing a render() function may not be necessary for your particular case.

Typically, if you have an array containing data objects, you can simply iterate over this array.

For instance,

<tr v-for="row in data">
   <td>
      This text is random:
      <my-custom-component>{{row.someData}}</my-custom-component>
   </td>
</tr>

If your component is not rendering and you see the component tag in the HTML like

<mycustomcomponent></mycustomcomponent>

, then it wasn't properly registered or was not found.

In addition, Vue typically does not render components when passed through a text string via props or any other means. Look into the v-html directive and the security risks associated with utilizing Raw HTML in templates.

So, if you want to dynamically render content, you'll need to employ Render Function APIs.

Nevertheless, in your situation, I don't believe it's absolutely necessary.

Answer 2

UPDATE

Encoding html in a text string to html using h() is not as straightforward as it seems.

The outcome will essentially be identical to placing the text string within double curly braces {{}} inside the template.

Take a look at the playground.

const { createApp, h } = Vue;

const MyCustomComp = {
  props: ['content'],
  setup(props) {
    return () => 
      h('div', null, props.content)
   }
}

const App = { components: { MyCustomComp } }
const app = createApp(App)
app.mount('#app')

#app { line-height: 2; }
[v-cloak] { display: none; }

<div id="app" v-cloak>
  <my-custom-comp :content="'<h1>Some Content</h1>'"></my-custom-comp>
  {{ '<h2>Some Other Content</h2>' }}
  <div v-html="'<h3>v-html does not work wuth custom components:</h3><MyCustomComp /><my-custom-comp></my-custom-comp>'"></div>
</div>
<script src="https://unpkg.com/vue@3/dist/vue.global.prod.js"></script>

You can utilize v-html to interpolate standard HTML, but it won't render the custom components correctly. Refer to the div with v-html.

I recommend exploring slots for your task as it would simplify the process significantly.

Alternatively, consider revising your design for a potentially simpler solution.

If not, you'll have to manually parse dynamic content from the text string and render it using the h() function, which presents a considerable challenge.

Check out my responses on Vue's Render Functions:

Adding custom HTML element inside a template using functions in Vue.js
Vue2 @click doesn't work with v-html in another component
Vue 3: How to use the render function to render different components that themselves render different components with slots, events, etc?

It's definitely feasible, and I'm confident that employing a render() function may not be necessary for your particular case.

Typically, if you have an array containing data objects, you can simply iterate over this array.

For instance,

<tr v-for="row in data">
   <td>
      This text is random:
      <my-custom-component>{{row.someData}}</my-custom-component>
   </td>
</tr>

If your component is not rendering and you see the component tag in the HTML like

<mycustomcomponent></mycustomcomponent>

, then it wasn't properly registered or was not found.

In addition, Vue typically does not render components when passed through a text string via props or any other means. Look into the v-html directive and the security risks associated with utilizing Raw HTML in templates.

So, if you want to dynamically render content, you'll need to employ Render Function APIs.

Nevertheless, in your situation, I don't believe it's absolutely necessary.

Answer 3

Answer №2

After taking the advice from comments and answers, I stumbled upon an enlightening article/tutorial about dynamic slots. This concept was entirely new to me, and I was thrilled to discover its possibilities.

The insightful article can be found on dev.to: Creating a Table Component with Dynamic Slot Names in Vue 3

This snippet demonstrates how the tr v-for element within the Table component appears:

<tr v-for="group in tableData">
    <td v-for="column in props.columns">
         <slot :name="`cell(${column.data})`" :value="group[column.data]" :item="group">
              {{ group[column.data] }}
         </slot>
    </td>
</tr>

Here is an example of how it can be utilized:

<Table :columns="tableColumns" :data="reportList">
    <template #cell(fileName)="{ value, item }">
          <a href="{{ value }}"> {{ value }}</a>
          <my-custom-element>Random content</my-custom-element>
    </template>
</Table>

This functionality enables the incorporation of dynamic content in any desired column. The article delves into more advanced customizations that this approach facilitates as well.

Answer 4

After taking the advice from comments and answers, I stumbled upon an enlightening article/tutorial about dynamic slots. This concept was entirely new to me, and I was thrilled to discover its possibilities.

The insightful article can be found on dev.to: Creating a Table Component with Dynamic Slot Names in Vue 3

This snippet demonstrates how the tr v-for element within the Table component appears:

<tr v-for="group in tableData">
    <td v-for="column in props.columns">
         <slot :name="`cell(${column.data})`" :value="group[column.data]" :item="group">
              {{ group[column.data] }}
         </slot>
    </td>
</tr>

Here is an example of how it can be utilized:

<Table :columns="tableColumns" :data="reportList">
    <template #cell(fileName)="{ value, item }">
          <a href="{{ value }}"> {{ value }}</a>
          <my-custom-element>Random content</my-custom-element>
    </template>
</Table>

This functionality enables the incorporation of dynamic content in any desired column. The article delves into more advanced customizations that this approach facilitates as well.

Rendering a custom Vue 3 component as a string and then passing it to another component as a prop

Answer №1

Answer №2

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