Import external component and loose reactivity in vue3 - html

Question

I have 2 projects/folders (with Lerna on the root).
The first one is uicomponents with some components and the second one is testing a simple app which uses some component from uicomponents.
I created a simple counter component (Counter.vue) :
<template>
<div>
<h3>Total clicks: {{ count }}</h3>
<div class="button-container">
<button class="inc" #click.prevent="increment">Add</button>
<button class="dec" #click.prevent="decrement">Subtract</button>
</div>
</div>
</template>
<script>
import { defineComponent, ref } from 'vue';
export default defineComponent({
name: 'Counter',
props: {
startingNumber: {
type: Number,
required: false,
default: 0,
},
},
setup(props) {
const count = ref(props.startingNumber);
const increment = () => {
count.value += 1;
alert(count.value);
};
const decrement = () => {
count.value -= 1;
};
return {
count,
increment,
decrement,
};
},
});
</script>
And I import it in my app on a simple page :
<template>
<div class="hello">
<h1>{{ msg }}</h1>
<counter :starting-number="5"></counter>
</div>
</template>
<script lang="ts">
import { defineComponent } from 'vue';
import Counter from '#uicomponents/counter';
export default defineComponent({
name: 'HelloWorld',
components: {
Counter,
},
props: {
msg: {
type: String,
required: false,
default: 'Me',
},
},
});
</script>
Lerna correctly replace all my components path and I retrieve my components Counter in my pages with all HTML. Buttons works well and my alert are displays with the correct value BUT my html are not refreshed.
This text <h3>Total clicks: {{ count }}</h3> stay "Total clicks: 0". My "count" ref is well updated because the alert displayed it correct but not in html.

Answer 1

I have a similar problem with lost reactivity. My setup is a bit different, but in the end it's the same result.
I'm trying to build a small plugin system which loads external components
Roughly I try to do this
// pluginSystem.js is accessible through window.myps
// ...
init(app) {
vueApp = app;
},
// ...
loadPlugin(data) {
vueApp.component(data.component.name, data.component);
}
And my external component looks like this
// main.js
import Counter from './components/Counter.vue';
window.myps.loadPlugin({
component: Counter,
});
Button click in counter, etc. works, console logging is fine as well, but component data is not updated.
I also tried defineComponent and defineAsyncComponent, but as you I had no luck with it...

Answer 2

Try it
import { defineAsyncComponent, defineComponent } from "vue"
components: {
Counter:defineAsyncComponent(() => import("#uicomponents/counter"))
}