Tab Scroller
A Tab Scroller allows for smooth native and animated scrolling of tabs.
Design & API Documentation
Installation
npm install @material/tab-scroller
Basic Usage
HTML Structure
<div class="mdc-tab-scroller">
<div class="mdc-tab-scroller__scroll-area">
<div class="mdc-tab-scroller__scroll-content"></div>
</div>
</div>
Styles
@use "@material/tab-scroller/mdc-tab-scroller";
JavaScript Instantiation
import {MDCTabScroller} from '@material/tab-scroller';
const tabScroller = new MDCTabScroller(document.querySelector('.mdc-tab-scroller'));
See Importing the JS component for more information on how to import JavaScript.
Style Customization
CSS Classes
CSS Class | Description |
---|
mdc-tab-scroller | Mandatory. Contains the tab scroller content. |
mdc-tab-scroller__scroll-area | Mandatory. Denotes the scrolling area. |
mdc-tab-scroller__scroll-content | Mandatory. Denotes the scrolling content. |
mdc-tab-scroller--align-start | Optional. Sets the elements inside the scroll content element to be aligned to the start of the scroll content element. |
mdc-tab-scroller--align-end | Optional. Sets the elements inside the scroll content element to be aligned to the end of the scroll content element. |
mdc-tab-scroller--align-center | Optional. Sets the elements inside the scroll content element to be aligned to the center of the scroll content element. |
NOTE: The align
modifier classes are only applicable when the contents do not meet or exceed the width of the Tab Scroller and Tab Bar (i.e., most commonly, when mdc-tab--min-width
is used on each tab).
Sass Mixins
Mixin | Description |
---|
transition($duration-ms, $timing-function) | Sets the scroll animation duration and, optionally, the timing function. |
MDCTabScroller
Methods
Method Signature | Description |
---|
scrollTo(scrollX: number) => void | Scrolls to the scrollX value. |
incrementScroll(scrollX: number) => void | Increments the current scroll value by the scrollX value using animation. |
incrementScrollImmediate(scrollX: number) => void | Increments the current scroll value by the scrollX value without animation. |
getScrollPosition() => number | Returns the current visual scroll position. |
getScrollContentWidth() => number | Returns the width of the scroll content element. |
Usage within Web Frameworks
If you are using a JavaScript framework, such as React or Angular, you can create a Tab Scroller for your framework. Depending on your needs, you can use the Simple Approach: Wrapping MDC Web Vanilla Components, or the Advanced Approach: Using Foundations and Adapters. Please follow the instructions here.
MDCTabScrollerAdapter
Method Signature | Description |
---|
eventTargetMatchesSelector(eventTarget: EventTarget, selector: string) => boolean | Returns true if the given event target satisfies the given CSS selector. |
addClass(className: string) => void | Adds a class to the root element. |
addScrollAreaClass(className: string) => void | Adds a class to the scroll area element. |
removeClass(className: string) => void | Removes a class from the root element. |
setScrollAreaStyleProperty(property: string, value: string) => void | Sets the given style property on the scroll area element. |
setScrollContentStyleProperty(property: string, value: string) => void | Sets the given style property on the scroll content element. |
getScrollContentStyleValue(property: string) => string | Returns the given style property value on the scroll content element. |
setScrollAreaScrollLeft(scrollLeft: number) => void | Sets the scroll area element's scrollLeft . |
getScrollAreaScrollLeft() => number | Returns the scroll area element's scrollLeft . |
getScrollContentOffsetWidth() => number | Returns the scroll content element's offsetWidth . |
getScrollAreaOffsetWidth() => number | Returns the scroll area element's offsetWidth . |
computeScrollAreaClientRect() => ClientRect | Returns the bounding client rect of the scroll area element. |
computeScrollContentClientRect() => ClientRect | Returns the bounding client rect of the scroll content element. |
computeHorizontalScrollbarHeight() => number | Returns the height of the browser's horizontal scrollbars (in px). |
util
Functions
MDC Tab Scroller provides a util
module with functions to help implement adapter methods.
Function Signature | Description |
---|
computeHorizontalScrollbarHeight(document: Document) => number | Returns the height of the browser's horizontal scrollbars (in px). |
MDCTabScrollerFoundation
Method Signature | Description |
---|
getRTLScroller() => MDCTabScrollerRTL | Creates an RTL Scroller instance for the current browser. |
getScrollPosition() => number | Returns the current visual scroll position. |
handleInteraction() => void | Responds to mouse, pointer, touch, and keyboard events. |
handleTransitionEnd(evt: Event) => void | Responds to a transitionend event on the mdc-tab-scroller__scroll-content element. |
incrementScroll(scrollX: number) => void | Increments the current scroll value by the scrollX value. |
scrollTo(scrollX: number) => void | Scrolls to the scrollX value. |
MDCTabScrollerRTL
Abstract class with three concrete implementations depending on the browser:
MDCTabScrollerRTLDefault
MDCTabScrollerRTLNegative
MDCTabScrollerRTLReverse
Method Signature | Description |
---|
getAnimatingScrollPosition(scrollX: number, translateX: number) => number | Returns the current scroll position during animation. |
getScrollPositionRTL(translateX: number) => number | Returns the number of px the user has scrolled horizontally, relative to the leading edge. |
incrementScrollRTL(scrollX: number) => MDCTabScrollerAnimation | Returns an object containing the values required to animate from the current scroll position to a new scroll position. |
scrollToRTL(scrollX: number) => MDCTabScrollerAnimation | Scrolls content horizontally to the given position in an RTL-friendly way. |