vue.js 2 single file component with dynamic template - vue.js

Question

I need a single file component to load its template via AJAX.
I search a while for a solution and found some hints about dynamic components.
I crafted a combination of a parent component which imports a child component and renders the child with a dynamic template.
Child component is this:
<template>
<div>placeholder</div>
</template>
<script>
import SomeOtherComponent from './some-other-component.vue';
export default {
name: 'child-component',
components: {
'some-other-component': SomeOtherComponent,
},
};
</script>
Parent component is this
<template>
<component v-if='componentTemplate' :is="dynamicComponent && {template: componentTemplate}"></component>
</template>
<script>
import Axios from 'axios';
import ChildComponent from './child-component.vue';
export default {
name: 'parent-component',
components: {
'child-component': ChildComponent,
},
data() {
return {
dynamicComponent: 'child-component',
componentTemplate: null,
};
},
created() {
const self = this;
this.fetchTemplate().done((htmlCode) => {
self.componentTemplate = htmlCode;
}).fail((error) => {
self.componentTemplate = '<div>error</div>';
});
},
methods: {
fetchTemplate() {
const formLoaded = $.Deferred();
const url = '/get-dynamic-template';
Axios.get(url).then((response) => {
formLoaded.resolve(response.data);
}).catch((error) => {
formLoaded.reject(error);
}).then(() => {
formLoaded.reject();
});
return formLoaded;
},
},
};
</script>
The dynamic template code fetched is this:
<div>
<h1>My dynamic template</h1>
<some-other-component></some-other-component>
</div>
In general the component gets its template as expected and binds to it.
But when there are other components used in this dynamic template (some-other-component) they are not recognized, even if they are correctly registered inside the child component and of course correctly named as 'some-other-component'.
I get this error: [Vue warn]: Unknown custom element: some-other-component - did you register the component correctly? For recursive components, make sure to provide the "name" option.
Do I miss something or is it some kind of issue/bug?

Answer 1

I answer my question myself, because I found an alternative solution after reading a little bit further here https://forum.vuejs.org/t/load-html-code-that-uses-some-vue-js-code-in-it-via-ajax-request/25006/3.
The problem in my code seems to be this logical expression :is="dynamicComponent && {template: componentTemplate}". I found this approach somewhere in the internet.
The original poster propably assumed that this causes the component "dynamicComponent" to be merged with {template: componentTemplate} which should override the template option only, leaving other component options as defined in the imported child-component.vue.
But it seems not to work as expected since && is a boolean operator and not a "object merge" operator. Please somebody prove me wrong, I am not a JavaScript expert after all.
Anyway the following approach works fine:
<template>
<component v-if='componentTemplate' :is="childComponent"></component>
</template>
<script>
import Axios from 'axios';
import SomeOtherComponent from "./some-other-component.vue";
export default {
name: 'parent-component',
components: {
'some-other-component': SomeOtherComponent,
},
data() {
return {
componentTemplate: null,
};
},
computed: {
childComponent() {
return {
template: this.componentTemplate,
components: this.$options.components,
};
},
},
created() {
const self = this;
this.fetchTemplate().done((htmlCode) => {
self.componentTemplate = htmlCode;
}).fail((error) => {
self.componentTemplate = '<div>error</div>';
});
},
methods: {
fetchTemplate() {
const formLoaded = $.Deferred();
const url = '/get-dynamic-template';
Axios.get(url).then((response) => {
formLoaded.resolve(response.data);
}).catch((error) => {
formLoaded.reject(error);
}).then(() => {
formLoaded.reject();
});
return formLoaded;
},
},
};
</script>