title: Crossbrowser compatibility with React/Angular
body: <p>As I am novice in web development I want to ask for clarification in following issues:</p>
  
  <p>1) What is the best practice to avoid crossbrowser issues (I found a lot of varianced info about that). I need clear, simple 'recipe' - what I should do first, next and so on.</p>
  
  <p>2) Related to point 1 what should we do when we want to keep crossbrowser compatibility AND get rid off JQuery from our project ?</p>
  
  <p>3) If we have React/Angular with preprocessors (SASS) and framework such as Flexbox/Bootstrap on our disposal what else can or should we do to create professional-looking website in terms of crossbrowser compatibility?</p>