Frontend Mentor - Intro section with dropdown navigation solution

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.

Table of contents

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

Overview

The challenge

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

Screenshot

Links

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

My process

Built with

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

What I learned

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'  

    })
})

Continued development

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.

Author

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