Material Design


MDC DOM provides commonly-used utilities for inspecting, traversing, and manipulating the DOM.

Most of the time, you shouldn’t need to depend on mdc-dom directly. It is useful however if you’d like to write custom components that follow MDC Web’s pattern and elegantly integrate with the MDC Web ecosystem.


npm install @material/dom

Basic Usage

import * as ponyfill from '@material/dom/ponyfill';

See Importing the JS component for more information on how to import JavaScript.

Ponyfill Functions

The ponyfill module provides the following functions:

Function Signature Description
closest(element: Element, selector: string) => ?Element Returns the ancestor of the given element matching the given selector (which may be the element itself if it matches), or null if no matching ancestor is found.
matches(element: Element, selector: string) => boolean Returns true if the given element matches the given CSS selector.

Event Functions

External frameworks and libraries can use the following event utility methods.

Method Signature Description
util.applyPassive(globalObj = window, forceRefresh = false) => object Determine whether the current browser supports passive event listeners

NOTE: The function util.applyPassive cache its results; forceRefresh will force recomputation, but is used mainly for testing and should not be necessary in normal use.