Method ngDoCheck

packages/common/src/directives/ng_class.ts:125–144

()

  detection cycle.
   */
  ngDoCheck(): void {
    // classes from the [class] binding
    for (const klass of this.initialClasses) {
      this._updateState(klass, true);
    }

    // classes from the [ngClass] binding
    const rawClass = this.rawClass;
    if (Array.isArray(rawClass) || rawClass instanceof Set) {
      for (const klass of rawClass) {
        this._updateState(klass, true);
      }
    } else if (rawClass != null) {
      for (const klass of Object.keys(rawClass)) {
        this._updateState(klass, Boolean(rawClass[klass]));
      }
    }

    this._applyStateDiff();
  }

  private _updateState(klass: string, nextEnabled: boolean) {
    const state = this.stateMap.get(klass);