What languages you need to have to be web developer
Between all the available coding languages, what codes you need to learn for web developing.
Have you ever heard by the "back-end" web development?
Before  you start:  I have  one  tips that’s  you make  you able to  code  in any language  in a very short time. 
Have you ever heard by Front End Path and Full Stack Path?
Before start coding:  you need to understand the purpose from this language?  its glossary ? its structure ?
I read  a  lot  and  here what  I found  that it’s  mandatory to learn as  web developer:  
  • HTML: for web developers - website structure
  • CSS: for web developers -   Front & styles
  • Java:
  • Java script: for web developers -  used  for creation  of  polls and quizzes, its runs in the visitors browsers
  • JQuery
  • AngularJS
  • PHP and MySQL
  • Ruby
  • Ruby on Rails

What you should learn also besides programing languages
  • E-commerce platform
  • Media queries

  • Scripting language
  • Systems language