This is a solution to the Intro section with dropdown navigation challenge on Frontend Mentor. Frontend Mentor challenges help you improve your coding skills by building realistic projects.

• Overview
  • The challenge
  • Screenshot
  • Links
• My process
  • Built with
  • What I learned
  • Continued development
• Author

Users should be able to:

• View the relevant dropdown menus on desktop and mobile when interacting with the navigation links
• View the optimal layout for the content depending on their device's screen size
• See hover states for all interactive elements on the page

• Repository URL: Repository
• Live Site URL: Demo page

• Semantic HTML5 markup
• CSS custom properties
• Flexbox
• CSS Grid
• Mobile-first workflow

Below is the code to handle the dropdown menu in mobile version, including the transition setup.

CSS code to style mobile dropdown

.sub__section { max-height: 0; height: fit-content; overflow: hidden; transition: max-height 500ms ease, margin 100ms ease 400ms, padding 0ms ease 300ms; padding-left: 1.5rem; } .sub__section.expanded { max-height: 200px; margin-top: 2rem; transition: max-height 500ms ease, margin 250ms ease 0ms; }

Js function to handle dropdown

const arrows = $$('.arrow'); arrows.forEach(arrow => { arrow.addEventListener('click', e => { const subSectionClasses = e.target.parentElement.lastElementChild.classList subSectionClasses.toggle('expanded', !subSectionClasses.contains('expanded')); arrow.src = !subSectionClasses.contains('expanded') ? '../images/icon-arrow-down.svg' : '../images/icon-arrow-up.svg' }) })

My layout skills still needs a bit of improvement. I'll keep using some time making pages and sites which need good layout skills to work on them.

• Website - Daniel Portillo
• Frontend Mentor - @dportillo23
• Twitter - @DaniDev23