I have wrote component in vue.js 2.6 what uses Propper.js.
Component is -generic popover component for displaying things like filters and menus in an element over the page.
For passing data into Popover function I am using refs maybe this is case?
Console throws error and says.
Popper: Invalid reference or popper argument provided. They must be either a DOM element or virtual element.
<template>
<div>
<div ref="popcorn" aria-describedby="tooltip">
<slot name="action" :toggle="toggle" :close="close"></slot>
</div>
<div ref="tooltip" role="tooltip" v-if="isOpen">
<div :class="[ci-popover, `ci-popover--background-color-${variant}`,`ci-divider--padding-${padding}`]">
<slot name="default" />
{{placement}}
</div>
</div>
</div>
</template>
<script lang="ts">
import { Vue, Component, Prop, Emit } from "vue-property-decorator";
import { oneOfOptions } from "../../helpers/PropertyValidators";
import { CiPopoverBackgroundColor, ciPopoverBackgroundColorArray } from './popover-background-color';
import { CiPopoverPlacement, ciPopoverPlacementArray } from './popover-placement';
import { CiSpacing, CiSpacingArray } from '../component-spacing';
import { createPopper, Instance, VirtualElement } from '@popperjs/core';
@Component
export default class CiPopover extends Vue {
$refs!: {
popcorn: Element,
tooltip: HTMLElement
}
/*Props/*
created() {
this.onOpen();
}
beforeDestroy() {
this.onClose();
}
public close(): void {
console.log('close method');
console.log(this.$refs.tooltip);
console.log(typeof this.$refs.tooltip);
}
public toggle(): void {
console.log('toggle method');
this.isOpen = true;
console.log(this.$refs.popcorn);
console.log(typeof this.$refs.popcorn);
}
@Emit('open')
onOpen() {
console.log("emit:open")
}
@Emit('close')
onClose() {
console.log("emit:close");
}
popperInstance = null as Instance | null
isOpen = false;
mounted() {
this.popperInstance = createPopper(this.$refs.popcorn , this.$refs.tooltip, {
placement: 'top'
});
}
}
</script>
Question is how to solve this problem?
Because the tooltip element is not rendered and so you are referencing to nothing.
Your tooltip element looks like:
<div ref="tooltip" role="tooltip" v-if="isOpen">
<div :class="[ci-popover, `ci-popover--background-color-${variant}`,`ci-divider--padding-${padding}`]">
<slot name="default" />
{{placement}}
</div>
</div>
It depends on the state isOpen
if it should be rendered and you start with false
as value as seen in:
isOpen = false
On mounted, you createPopper
right away but you did not open the tooltip yet.
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