Method isSelected

src/cdk-experimental/selection/selection.ts:170–176

Checks whether a value is selected. `index` is required if `trackBy` is used.

(value: T, index?: number)

  /** Checks whether a value is selected. `index` is required if `trackBy` is used. */
  isSelected(value: T, index?: number) {
    if (!!this.trackByFn && index == null && (typeof ngDevMode === 'undefined' || ngDevMode)) {
      throw Error('CdkSelection: index required when trackBy is used');
    }

    return this._selection.isSelected({value, index});
  }

  /** Checks whether all values are selected. */
  isAllSelected() {