ukiyojs

Ukiyo.js

Simple and lightweight JavaScript library for modern background parallax,
with support for picture elements and any images.

⛰️
DEMO

Installation

You can install the library via npm/yarn:

npm install ukiyojs

yarn add ukiyojs

or via CDN:

<script src="https://cdn.jsdelivr.net/npm/ukiyojs@1.0.1/dist/ukiyo.min.js"></script>

Import Ukiyo.js:

import Ukiyo from "ukiyojs";

Usage

HTML

Give the element you want to parallax a cool name to call it in JavaScript.

→ <img> element

<img class="ukiyo" src="image.jpg">

→ <picture> element

<picture>
  <source srcset="img.webp" type="image/webp">
  <img class="ukiyo" src="img.png">
<picture>

<picture>
  <source srcset="~" media="(min-width: 1000px)" />
  <source srcset="~" media="(min-width: 700px)" />
  <img class="ukiyo" src="~">
</picture>

picture tag element is also supported: set the parallax to the img tag inside the picture tag.

→ Other Element

<div class="ukiyo"></div>

Don't forget to set the background-image to the style when you set it in the img tag element.

JavaScript

const image = document.querySelector('.ukiyo');

new Ukiyo(image)

You are now ready to go.

---

If you want to apply it to more than one element, you need to loop through them as follows:

const images = document.querySelectorAll(".ukiyo");
// You can do the loop in any way you like.
images.forEach(image => {
  new Ukiyo(image, {
    speed: 2,
    scale: 1.25
  });
});

Options

Option	Type	Default	Description
scale	number	1.5	Parallax image scaling factor.
speed	number	1.5	Parallax speed.
willChange	boolean	false	If true, the element will be given a will-change: transform when Parallax is active.
wrapperClass	string	null	Class name of the automatically generated wrapper element.

These can be configured with the following JS code:

const parallax = document.querySelector('.image');

new BgParallax(parallax, {
    scale: 1.5, // 1~2 is recommended
    speed: 1.5, // 1~2 is recommended
    willChange: true, // This may not be valid in all cases
    wrapperClass: "ukiyo-wrapper"
})

Element Options

These options can be set individually for an element using the data-u-* attribute:

<img
  data-u-scale="2"
  data-u-speed="1.7"
  data-u-wrapper-class="wrapper-name"
  data-u-willchange
>

Option	Description
data-u-scale=""	scale option.
data-u-speed=""	speed option.
data-u-willchange	willChange option. Simply attach it to the element to make it valid.
data-u-wrapper-class=""	wrapperClass option.

Option names start with data-u-*. Don't forget to prefix the option name with a "u", if u do.

Methods

reset()

Reset the instance and recalculate the size and position of the elements etc :

const image = document.querySelector('.image');
const instance = new Ukiyo(image);

instance.reset();

destroy()

Destroy instance:

const image = document.querySelector('.image');
const instance = new Ukiyo(image);

instance.destroy();

Browser Support

IE	Edge	Firefox	Chrome	Opera	Safari	iOS Safari
❌No Support	✅Latest	✅Latest	✅Latest	✅Latest	✅Latest	✅Latest

To support older browsers such as IE, you will need to use the Intersection Observer API, Promise and closest() polyfills. If you use img tag, you will also need to use the object-fit polyfill.

However, please note that even with polyfill, the Parallax animation does not run smoothly in IE.

License

MIT License