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I am a junior web developer and now I am also developing iOS and Android applications. I am just wondering if it is worthwhile to invest much time and energy in learning JavaScript and developing in JavaScript. I am not sure whether HTML 5 or CSS3 will totally replace JavaScript or creating cross-platform applications will not need JavaScript?
Thanks
To put things in perspective, there are more JavaScript virtual machines deployed than any other VM technology. Nearly every device that has a web browser is capable of executing JavaScript.
Due to this fact alone, it is unlikely that JavaScript will become “much less important.” If anything, its usage should continue to grow.