When I read this I was reminded of the time I tried to master AngularJS. I invested a lot of time learning it through projects and all. Right when I felt so comfortable so much that I disregarded the existence of other frameworks google announced that they're discontinuing its support. I knew about directives, controllers and services but nothing about components.
Later when I picked up on Vue, I had an idea of concepts used by Angular, Vue and React. And also that frameworks come and go
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