Question
When I look at job listings they list everything: html5/css3, Javascript, Jquery, React.js, Php, MySql, Bootstrap. I'm sorry but theres no way I can learn all that and be spectacular and fast at all of those unless someone's been at it for years and years (I haven't).
But would it be best to ONLY do Javascript and be *The Best* Javascript guy?
Or ONLY Sql and be "The best SQL guy?"
Is it better go be a mile wide and 1 inch deep, or a mile deep and 1 inch wide?
Answer
As Lee said, it will really depend on what you are planning on doing with your career. If you really want to be a successful developer, you need to be familiar with more than just one language. That will not only help you get better jobs, but many of these programming languages need to interface with one another. For example, if you want to work for an e-commerce development company, chances are you will need PHP, MySQL, JavaScript, Jquery and HTML/CSS at a minimum. Learning just one of those will not really give you much traction. You'll probably find that you enjoy working with one of those more than the others, but you really need at least a basic understanding of all of them.
