Method _updateValueIndicatorUI

src/material/slider/slider.ts:741–762

Updates the value indicator tooltip ui for the given thumb.

(source: _MatSliderThumb)

  /** Updates the value indicator tooltip ui for the given thumb. */
  _updateValueIndicatorUI(source: _MatSliderThumb): void {
    if (this._skipUpdate()) {
      return;
    }

    const valuetext = this.displayWith(source.value);

    this._hasViewInitialized
      ? source._valuetext.set(valuetext)
      : source._hostElement.setAttribute('aria-valuetext', valuetext);

    if (this.discrete) {
      source.thumbPosition === _MatThumb.START
        ? (this.startValueIndicatorText = valuetext)
        : (this.endValueIndicatorText = valuetext);

      const visualThumb = this._getThumb(source.thumbPosition);
      valuetext.length < 3
        ? visualThumb._hostElement.classList.add('mdc-slider__thumb--short-value')
        : visualThumb._hostElement.classList.remove('mdc-slider__thumb--short-value');
    }
  }

  /** Updates all value indicator UIs in the slider. */
  private _updateValueIndicatorUIs(): void {