JavaScript for Bulma Responsive Navbar

This post is for those who do not want to write their own JavaScript code, and just want to use the same code as that in Bulma official website.

The navbar code here comes from Transparent navbar [1] in Bulma official site, and the JavaScript code comes from main.js used in the official site too.

Demo

Full source code is as follows:

index.html | repository | view raw 
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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>JavaScript for Bulma navbar</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bulma/0.6.2/css/bulma.min.css">
    <script defer src="https://use.fontawesome.com/releases/v5.0.4/js/all.js"></script>
  </head>
  <body>

<nav class="navbar is-transparent">
  <div class="navbar-brand">
    <a class="navbar-item" href="https://bulma.io">
      <img src="https://bulma.io/images/bulma-logo.png" alt="Bulma: a modern CSS framework based on Flexbox" width="112" height="28">
    </a>
    <div class="navbar-burger burger" data-target="navbarExampleTransparentExample">
      <span></span>
      <span></span>
      <span></span>
    </div>
  </div>

  <div id="navbarExampleTransparentExample" class="navbar-menu">
    <div class="navbar-start">
      <a class="navbar-item" href="https://bulma.io/">
        Home
      </a>
      <div class="navbar-item has-dropdown is-hoverable">
        <a class="navbar-link" href="/documentation/overview/start/">
          Docs
        </a>
        <div class="navbar-dropdown is-boxed">
          <a class="navbar-item" href="/documentation/overview/start/">
            Overview
          </a>
          <a class="navbar-item" href="https://bulma.io/documentation/modifiers/syntax/">
            Modifiers
          </a>
          <a class="navbar-item" href="https://bulma.io/documentation/columns/basics/">
            Columns
          </a>
          <a class="navbar-item" href="https://bulma.io/documentation/layout/container/">
            Layout
          </a>
          <a class="navbar-item" href="https://bulma.io/documentation/form/general/">
            Form
          </a>
          <hr class="navbar-divider">
          <a class="navbar-item" href="https://bulma.io/documentation/elements/box/">
            Elements
          </a>
          <a class="navbar-item is-active" href="https://bulma.io/documentation/components/breadcrumb/">
            Components
          </a>
        </div>
      </div>
    </div>

    <div class="navbar-end">
      <div class="navbar-item">
        <div class="field is-grouped">
          <p class="control">
            <a class="bd-tw-button button" data-social-network="Twitter" data-social-action="tweet" data-social-target="http://localhost:4000" target="_blank" href="https://twitter.com/intent/tweet?text=Bulma: a modern CSS framework based on Flexbox&amp;hashtags=bulmaio&amp;url=http://localhost:4000&amp;via=jgthms">
              <span class="icon">
                <i class="fab fa-twitter"></i>
              </span>
              <span>
                Tweet
              </span>
            </a>
          </p>
          <p class="control">
            <a class="button is-primary" href="https://github.com/jgthms/bulma/archive/0.5.1.zip">
              <span class="icon">
                <i class="fas fa-download"></i>
              </span>
              <span>Download</span>
            </a>
          </p>
        </div>
      </div>
    </div>
  </div>
</nav>

  <script src="main.js"></script>
  </body>
</html>
main.js | repository | view raw 
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'use strict';

document.addEventListener('DOMContentLoaded', function () {

  // Dropdowns in navbar

  var $dropdowns = getAll('.navbar-item.has-dropdown:not(.is-hoverable)');

  if ($dropdowns.length > 0) {
    $dropdowns.forEach(function ($el) {
      $el.addEventListener('click', function (event) {
        event.stopPropagation();
        $el.classList.toggle('is-active');
      });
    });

    document.addEventListener('click', function (event) {
      closeDropdowns();
    });
  }

  function closeDropdowns() {
    $dropdowns.forEach(function ($el) {
      $el.classList.remove('is-active');
    });
  }

  // Close dropdowns if ESC pressed
  document.addEventListener('keydown', function (event) {
    var e = event || window.event;
    if (e.keyCode === 27) {
      closeDropdowns();
    }
  });

  // Toggles

  var $burgers = getAll('.burger');

  if ($burgers.length > 0) {
    $burgers.forEach(function ($el) {
      $el.addEventListener('click', function () {
        var target = $el.dataset.target;
        var $target = document.getElementById(target);
        $el.classList.toggle('is-active');
        $target.classList.toggle('is-active');
      });
    });
  }

  // Functions

  function getAll(selector) {
    return Array.prototype.slice.call(document.querySelectorAll(selector), 0);
  }
});

Tested on:

  • Chromium 63.0.3239.84 on Ubuntu 17.10 (64-bit)
  • Bulma 0.6.2
  • Font Awesome 5.0.4

References:

[1]Navbar | Bulma: a modern CSS framework based on Flexbox
[2]https://bulma.io/lib/main.js?v=201801161752
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