0👍
Thank you @IsraGab for your response and the code.
Your are right it’s working but there is another problem that I didn’t ask correctly.
It’s not working when I’m calling the component method from main app in incorrect way.
After a day searching I find the solution.
Using Component Refs
The correct way to calling method is:
this.$refs.errMsg.show('some messages')
Where we have component tag like this:
<v-error ref="errMsg"></v-error>
Thanks again to all
Source:stackexchange.com