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@ebondioli/one-scroll

v0.0.11

Published

One scroll aims to normalize scroll events between different browsers and input devices and identify whether the event was triggered by the user or by the OS momentum scroll.

Downloads

38

Readme

one-scroll

One scroll aims to normalize scroll events between different browsers and input devices and identify whether the event was triggered by the user or by the OS momentum scroll.

Installation

npm install --save one-scroll

Getting started

To create a new one instance:

import One from 'one-scroll';
const el = document.getElementById('target-el');
const one = new One(el, {
  // default option values
  samples: 150,         // total samples used for momentum scroll detection
  dragThreshold: 8,     // drag distance to detect a trouch scroll event
  deltaThreshold: 0.5,  // threshold below which the event is considered inertial
  minDelta: 0.01,       // min delta to detect scroll events
  resetTime: 200,       // ms to reset scroll data, after this timeout following events will be treated as a different scroll action
});

You can then attach an event listener to the instance:

one.addEventListener((e) => {
    // do something
})

The event being passed to the callback contains an additional property one:

e.one = {
    averageEnd: 0.208       // average delta of the last 10% of the samples
    averageMiddle: 0.425    // average delta of the last 50% of the samples
    offset: -0.217          // (averageEnd - averageMiddle) used to detect inertial events
    delta: 0.15             // delta of the current event
    deltas: []              // all registered deltas for current scroll event
    direction: 1            // normalized scroll direction (+/- 1)
    id: 1                   // id of the current scroll action
    inertial: true          // wether the event is user-triggered or inertial
    timestamp: 1974.03      // timestamp of the scroll event
}

License

MIT.