menuspy

MenuSpy

A JavaScript library to make navigation menus highlight active item based on the scroll position.

• No dependencies
• Easy to use
• Lightweight and fast

Usage

Include MenuSpy

<script src="menuspy.js"></script>

MenuSpy will be available in the global scope.

Or install with NPM and require as a module

npm install menuspy

var MenuSpy = require('menuspy');

Initialize the plugin on your menu element

<header id="main-header">
  <nav>
    <ul>
      <li><a href="#features">Features</a></li>
      <li><a href="#usage">Usage</a></li>
      <li><a href="#options">Options</a></li>
      <li><a href="#examples">Examples</a></li>
    </ul>
  </nav>
</header>

var elm = document.querySelector('#main-header');
var ms = new MenuSpy(elm);

The MenuSpy() constructor accepts two arguments: the container element and an options object.

Options

Option	Type	Default	Description
menuItemSelector	String	a[href^="#"]	Menu items selector.
menuItemSelector	String	active	Class applied on menu item relative to the currently visible section.
threshold	Integer	15	Ammount of space between your menu and the next section to be activated.
hashTimeout	Integer	600	Timeout to apply browser's hash location.
callback	Function	function(anchorElm, targetElm) {}	A function to be called every time a new menu item activates.