I'm on 2.2.1 with custom theme
when login failed, message showed up but are not cleared, it showed duplicate, and when login successfully, its still showing in account infomation page
Magento 2.2.1 – Error/Success Messages Show Wrong Page and Are Not Cleared
magento-2.2.1magento2messages
Best Answer
Override messages.js in this location:
app/design/frontend/Mastering/itdesire/Magento_Theme/web/js/view/messages.js