I have seen many posts and comments without counting innumerable job vacancies that require different FrontEnd frameworks like Angular (JS, 2, 4), ReactJS, VueJS which because of the readings I have done seem to be all able to solve the same problem, use almost the same logic of operation without telling that they are all for FrontEnd, but my biggest doubt is which one should I invest in? At this moment I know AngularJs, Angular4 to be honest I have a bit of a desire to learn ReactJS and VueJS through the many posts I have read and they seem to be really interesting, but is it worth learning all these or can I focus on being good at these I know that any challenge that is solved with others with such a supposed facility does not feel disadvantageous either?
Thank you and accept any opinion