Popover triggers focus occasionally throws error #4411
Description
Describe the bug
The environment:
Vue.js 2.6.10
Electron 2.0.18
Node 8.9.3
Platform linux
In my scenario I have a button which triggers a popover:
<b-nav-item id="popover-button-variant">Options</b-nav-item>
And this is the popover:
<b-popover
target="popover-button-variant"
triggers="focus"
>
<!-- show some text here -->
<!-- button which triggers a modal -->
<b-btn @click.stop="showConfig = true">Config</b-btn>
</b-popover>
Everything works good sometimes: when the modal button is pressed, the modal shows and the popover disappear. So from time to time, after doing some clicks on the modal trigger button, then close the modal, close the popover and replay the procedure I'm getting this error:
[Vue warn]: Error in v-on handler: "TypeError: Cannot read property '$el' of undefined"
found in
---> <BTr>
<BTbody>
<BTable>
<SystemInformation> at src/renderer/components/Main/SystemInformation.vue
<BVPopoverTemplate>
<BVPopover>
<BPopover>
<Ev> at src/renderer/App.vue
<Root>
warn @ vue.esm.js?a026:628
logError @ vue.esm.js?a026:1893
globalHandleError @ vue.esm.js?a026:1888
handleError @ vue.esm.js?a026:1848
invokeWithErrorHandling @ vue.esm.js?a026:1871
invoker @ vue.esm.js?a026:2188
original._wrapper @ vue.esm.js?a026:7559