JarCasting
IronScrollTargetBehavior
IronScrollTargetBehavior allows an element to respond to scroll events from a designated scroll target.
Elements that consume this behavior can override the _scrollHandler method to add logic on the scroll event.
See: Documentation, Demo.
Usage
Installation
npm install --save @polymer/iron-scroll-target-behavior
In a Polymer 3 element
import {PolymerElement, html} from '@polymer/polymer';
import {mixinBehaviors} from '@polymer/polymer/lib/legacy/class.js';
import {IronScrollTargetBehavior} from '@polymer/iron-scroll-target-behavior/iron-scroll-target-behavior.js';
class SampleElement extends mixinBehaviors(IronScrollTargetBehavior, PolymerElement) {
static get template() {
return html`
<p>Scrollable content here</p>
`;
}
_scrollHandler() {
console.log('_scrollHandler', this._scrollTop, this._scrollLeft);
}
}
customElements.define('sample-element', SampleElement);
Contributing
If you want to send a PR to this element, here are the instructions for running the tests and demo locally:
Installation
git clone https://github.com/PolymerElements/iron-scroll-target-behavior
cd iron-scroll-target-behavior
npm install
npm install -g polymer-cli
Running the demo locally
polymer serve --npm
open http://127.0.0.1:<port>/demo/
Running the tests
polymer test --npm
