virtual-scroll-list
v0.7.3
Published
Think of it as UITableView for the DOM elements
Downloads
300
Readme
Virtual Scroll
_ ___ __ __ _____ ____
| | / (_)____/ /___ ______ _/ / / ___/______________ / / /
| | / / / ___/ __/ / / / __ `/ / \__ \/ ___/ ___/ __ \/ / /
| |/ / / / / /_/ /_/ / /_/ / / ___/ / /__/ / / /_/ / / /
|___/_/_/ \__/\__,_/\__,_/_/ /____/\___/_/ \____/_/_/
Virtual list that is able to render infinite ammount of DOm element using UITableView techniques and. This is already been done in a lot of ways but Here I am trying to use CSS translate to scroll the container which more performant than changing the top. Paul Irish made a great benchmark here http://www.paulirish.com/2012/why-moving-elements-with-translate-is-better-than-posabs-topleft/
Example Usage
Getting the library
git clone https://github.com/Khaledgarbaya/virtual-scroll.git
cd virtual-scroll
npm install
Code
// BASIC INITIALIZATION
import VirtualScroll from 'VirtualScroll';
let listSource = [];
for (let i = 0; i < 3000; i++) listSource.push({ itemId: i });
let virtualScroll1 = new VirtualScroll({
// DOMnode the list will be renderd inside
root: document.getElementsByClassName('NAME_THE_CONTAINER_WHATEVER_YOU_LIKE')[0],
itemHeight: 50,
// ARRAY containg all the objects to be displayed inside the list
source: listSource,
/**
* FUNCTION to be called while creating a single item
*
* @param {object} itemNodes empty object provided by the list logic
* @param {DOMnode} itemContainer item container provided by the list logic
*/
createItemFn: (itemNodes, itemContainer) => {
// EXAMPLE
// itemNodes.text1 = document.createElement('span');
// itemContainer.appendChild(itemNodes.text1);
},
/**
* FUNCTION to be called while updating a single item
*
* @param {object} itemNodes object previously filled by createItemFn()
* @param {DOMnode} itemContainer item container provided by the list logic
* @param {object} itemData object inside listSource array at the current index
*/
updateItemFn: (itemNodes, itemContainer, itemData) => {
// EXAMPLE
// update itemNodes.text1 with itemData.itemId
}
});
Improvement/TODO
- Documentation
- More Unit tests
- Adding Scrolling using mouse wheel
- Adding e2e tests
- handling images (only load the visible items)