Responsive Collapsible Side & Tab Navigation In JavaScript/CSS

Preview:

Description:

A responsive, mobile-friendly, collapsible/expandable sidebar & tab navigation written in plain JavaScript and CSS.

• Desktop: Allows you to collapse the navigation into an icon-only side menu.
• Mobile: Automatically converts the sidebar nav into a bottom tab bar.

How to use it:

1. Code the HTML for the sidebar navigation.

<div class="nav" id="nav">
  <nav class="nav__content">
    <div class="nav__toggle" id="nav-toggle">
      <i class='bx bx-chevron-right' ></i>
    </div>
    <a href="#" class="nav__logo">
    <i class='bx bxs-heart' ></i>
    <span class="nav__logo-name">Healthy</span>
    </a>
    <div class="nav__list">
      <a href="#" class="nav__link active-link">
      <i class='bx bx-grid-alt'></i>
      <span class="nav__name">Dashboard</span>
      </a>
      <a href="#" class="nav__link">
      <i class='bx bx-file'></i>
      <span class="nav__name">Appointments</span>
      </a>
      <a href="#" class="nav__link">
      <i class='bx bx-envelope' ></i>
      <span class="nav__name">Messages</span>
      </a>
      <a href="#" class="nav__link">
      <i class='bx bx-bar-chart-square' ></i>
      <span class="nav__name">Statistic</span>
      </a>
      <a href="#" class="nav__link">
      <i class='bx bx-cog' ></i>
      <span class="nav__name">Settings</span>
      </a>
    </div>
  </nav>
</div>

2. We use boxicons for the navigation icons in this example.

<link href="https://unpkg.com/[email protected]/css/boxicons.min.css" rel="stylesheet" />

3. The necessary CSS styles.

/*=============== VARIABLES CSS ===============*/
:root {
  /*========== Colors ==========*/
  /*Color mode HSL(hue, saturation, lightness)*/
  --first-color: hsl(228, 81%, 49%);
  --title-color: hsl(228, 12%, 15%);
  --text-color: hsl(228, 8%, 50%);
  --body-color: hsl(228, 100%, 99%);
  --container-color: #fff;
  /*========== Font and typography ==========*/
  /*.5rem = 8px | 1rem = 16px ...*/
  --body-font: 'Poppins', sans-serif;
  --normal-font-size: .938rem;
}
/* Responsive typography */
@media screen and (min-width: 968px) {
  :root {
    --normal-font-size: 1rem;
  }
}
/*=============== BASE ===============*/
* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}
body {
  position: relative;
  font-family: var(--body-font);
  font-size: var(--normal-font-size);
  background-color: var(--body-color);
  color: var(--text-color);
}
a {
  text-decoration: none;
}
/*=============== NAV ===============*/
.container {
  margin-left: 1rem;
  margin-right: 1rem;
}
.section {
  padding: 2rem 0;
}
@media screen and (max-width: 767px) {
  .nav__logo, 
  .nav__toggle, 
  .nav__name {
    display: none;
  }
  .nav__list {
    position: fixed;
    bottom: 2rem;
    background-color: var(--container-color);
    box-shadow: 0 8px 24px hsla(228, 81%, 24%, .15);
    width: 90%;
    padding: 30px 40px;
    border-radius: 1rem;
    left: 0;
    right: 0;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    column-gap: 36px;
    transition: .4s;
  }
}
.nav__link {
  display: flex;
  color: var(--text-color);
  font-weight: 500;
  transition: .3s;
}
.nav__link i {
  font-size: 1.25rem;
}
.nav__link:hover {
  color: var(--first-color);
}
/* Active link */
.active-link {
  color: var(--first-color);
}
/*=============== BREAKPOINTS ===============*/
/* For small devices */
@media screen and (max-width: 320px) {
  .nav__list {
    column-gap: 20px;
  }
}
/* For medium devices */
@media screen and (min-width: 576px) {
  .nav__list {
    width: 332px;
  }
}
@media screen and (min-width: 767px) {
  .container {
    margin-left: 7rem;
    margin-right: 1.5rem;
  }
  .nav {
    position: fixed;
    left: 0;
    background-color: var(--container-color);
    box-shadow: 1px 0 4px hsla(228, 81%, 49%, .15);
    width: 84px;
    height: 100vh;
    padding: 2rem;
    transition: .3s;
  }
  .nav__logo {
    display: flex;
  }
  .nav__logo i {
    font-size: 1.25rem;
    color: var(--first-color);
  }
  .nav__logo-name {
    color: var(--title-color);
    font-weight: 600;
  }
  .nav__logo, .nav__link {
    align-items: center;
    column-gap: 1rem;
  }
  .nav__list {
    display: grid;
    row-gap: 2.5rem;
    margin-top: 10.5rem;
  }
  .nav__content {
    overflow: hidden;
    height: 100%;
  }
  .nav__toggle {
    position: absolute;
    width: 20px;
    height: 20px;
    background-color: var(--title-color);
    color: #fff;
    border-radius: 50%;
    font-size: 1.20rem;
    display: grid;
    place-items: center;
    top: 2rem;
    right: -10px;
    cursor: pointer;
    transition: .4s;
  }
}
/* Show menu */
.show-menu {
  width: 255px;
}
/* Rotate toggle icon */
.rotate-icon {
  transform: rotate(180deg);
}
/* For 2K & 4K resolutions */
@media screen and (min-width: 2048px) {
  body {
    zoom: 1.7;
  }
}
@media screen and (min-width: 3840px) {
  body {
    zoom: 2.5;
  }
}

4. The main JavaScript.

/*=============== LINK ACTIVE ===============*/
const linkColor = document.querySelectorAll('.nav__link')
function colorLink(){
  linkColor.forEach(l => l.classList.remove('active-link'))
  this.classList.add('active-link')
}
linkColor.forEach(l => l.addEventListener('click', colorLink))
/*=============== SHOW HIDDEN MENU ===============*/
const showMenu = (toggleId, navbarId) =>{
  const toggle = document.getElementById(toggleId),
  navbar = document.getElementById(navbarId)
  if(toggle && navbar){
      toggle.addEventListener('click', ()=>{
          /* Show menu */
          navbar.classList.toggle('show-menu')
          /* Rotate toggle icon */
          toggle.classList.toggle('rotate-icon')
      })
  }
}
showMenu('nav-toggle','nav')