el-popover is used internally.
https://yujinpan.github.io/el-popover
npm install --save el-popover
<template>
<button>
test
<ElPopover placement="right">popover</ElPopover>
</button>
</template>
<script>
import ElPopover from 'el-popover';
export default {
components: {
ElPopover
}
};
</script>