How to use the @material/slider/foundation.js.strings function in @material/slider

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distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*/
import {applyPassive} from '@material/dom/events.js';
import {addHasRemoveClass, EventType, FormElement, observer, SpecificEventListener} from '@material/mwc-base/form-element.js';
import {MDCSliderAdapter} from '@material/slider/adapter.js';
import MDCSliderFoundation from '@material/slider/foundation.js';
import {html, property, query, TemplateResult} from 'lit-element';
import {classMap} from 'lit-html/directives/class-map';
import {styleMap} from 'lit-html/directives/style-map';

const {INPUT_EVENT, CHANGE_EVENT} = MDCSliderFoundation.strings;

export class SliderBase extends FormElement {
  protected mdcFoundation!: MDCSliderFoundation;

  protected readonly mdcFoundationClass = MDCSliderFoundation;

  @query('.mdc-slider') protected mdcRoot!: HTMLElement;

  @query('.mdc-slider') protected formElement!: HTMLElement;

  @query('.mdc-slider__thumb-container') protected thumbContainer!: HTMLElement;

  @query('.mdc-slider__pin-value-marker') protected pinMarker!: HTMLElement;

  @property({type: Number})
  @observer(function(this: SliderBase, value: number) {