![]() ![]() ![]() Once again note that in the course of refactoring, the core scrolling animation code didn’t change. Import easeInOutQuad from './easing' export default class Jump With a suitable polyfill for requestAnimationFrame it should run even on older browsers. Again, refer to the documentation for the full list of supported browsers. ![]() Jump.js runs without problems on ‘modern’ browsers, including Internet Explorer version 10 or higher. We will see them in action later in the demo. We can configure a jump with some options such as the duration (this parameter is mandatory), the easing function, and a callback to be fired at the end of the animation. Note that currently only the scrolling of the viewport is supported and only vertically. This means that in the implementation of the smooth scrolling pattern, we must perform the link hijacking ourselves. Here is a is the final demo that we’ll be creating:Īs suggested by the library name, it provides only the jump: the animated change of the scrollbar position from its current value to the destination, specified by providing either a DOM element, a CSS selector, or a distance in the form of a positive or negative number value. Support, when available, for native smooth scrolling with CSS will then be added and finally we will conclude with some observations concerning the browser navigation history. We will then create a HTML page to test the smooth scrolling behavior that it will be then implemented as a custom script. In doing this, we will refresh some core JavaScript language skills such as functions and closures. ![]() Specifically, we are going to explore and leverage the Jump.js library.Īfter a presentation of the library, with an overview of its features and characteristics, we will apply some changes to the original code to adapt it to our needs. There are many implementations of this pattern within the jQuery ecosystem, either using jQuery directly or implemented with a plugin, but in this article we are interested in a pure JavaScript solution. This is nothing new, being a pattern known from many years now, check for instance this SitePoint article that dates back to 2003! As an aside, this article has a historical value as it shows how client-side JavaScript programming, and the DOM in particular, has changed and evolved over the years, allowing the development of less cumbersome vanilla JavaScript solutions. But I guess right now you've got the idea of the main logic behind this, so it will be quite easy to add these features in case you need them.Smooth scrolling is a user interface pattern that progressively enhances the default in-page navigation experience, animating the change of position within the scroll box (the viewport, or a scrollable element) from the location of the activated link to the location of the destination element indicated in the hash fragment of the link URL. App.js import React from "react" import "./styles.css" import ScrollToButton from "./components/ScrollToButton" import Section from "./components/Section" const sections = export default function App ( ) Īnd that's it! You can even customize it to scroll horizontally or maybe support scrolling inside specific elements but for the sake of clarity we are not showing it here. ![]()
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