A JavaScript library to make navigation menus highlight the item based on currently in view section.

• No dependencies
• Easy to use
• Lightweight and fast

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.