CSS and Javascript

Best friends forever



To learn the basics of the front end “stack” and how they should and shouldn’t work together.

  • HTML
  • CSS
  • Javascript

The Stack

HTML: Content Structure

Hy·per·Text Mark·up Lan·guage /ˈhīpərˌtekst ˈmärˌkəp ˈlaNGɡwij/

  • Content Structure
    • Heirarchy
    • Semantics
  • Form Controls
  • Hooks for CSS and Javascripts

CSS: Design (User Interface)

Cas·cad·ing Style Sheet /kaˈskādiNG stīl SHēt/

  • Classes and IDs to style HTML
  • Layout and Positioning
  • Design and Styling
  • Simple animations and interactions

Javascript: Interaction (User Experience)

Ja·va·Script /ˈjävəskript,ˈjavə-/

  • Interaction with a back end
    • APIs
    • Track the action
  • Complex animations
  • Event handling

The Overlap


“I suppose it is tempting, if the only tool you have is a hammer, to treat everything as if it were a nail.” - Abraham Maslow

Usually both

Just try to keep your javascript clear of manually changing CSS. You should just use your javascript to toggle CSS classes or to utilize animation libraries, such as Velocity.

jQuery is the perfect example of blending CSS and javascript, since you use CSS selectors to interact with your javascript.

With/without jQuery

Expanding/Collapsing a content section: Event listeners and selectors.

Side by Side CSS vs Javascript

Hover vs Mouseover

Show simple button animations

Progressive Enhancement


Just links to other pages

AJAX Requests

Calls the other pages

jQuery show/hide

Just shows and hides the content that’s already on the page.

Javascript and CSS

Javascript that adds/removes classes to show/hide the content. This is my reccomendation, 99% of the time.

Pure CSS

Just because we can do this, does it mean we should?


30 CSS Selectors Bootstrap Cutestrap