As you know above skills are the basics of all web development skills. If someone has mastered those, he(or she) can does anything in web development field. That's why I have been learning those skills since student days,2008, and now I am using almost web frameworks. My friends call me "javascript ninja", and actually I can do anything using HTML5, CSS3, Javascript. Furthermore, I stand in cutting-edge in javascript field. Any javascript programming is no problem for me. If you want to fix bugs or create web app, or build a website, please hesitate to contact me. Then I will provide the best serve to solve your problem.