scrollspy

Zero dependencies scrollspy library using the Intersection Observer API.

Demo

Install

``
npm install @jfm/scrollspy
`

Usage

`js
import scrollspy from '@jfm/scrollspy'
// or
// import { observe, unobserve } from '@jfm/scrollspy'

const el = document.getElementById('section')

function callback(el) {
console.log('scrolled to', el)
}

scrollspy.observe(el, callback)
`

APIs

$3

`js
observe(element, callback)
`

Observe the element, call the callback when it comes into the viewport.
You can call it multiple times with different callbacks.

$3

`js
unobserve(element, [callback])
`

Unobserve the element with callback. If callback` is not defined, remove all the callbacks.

License