我试图阻止resultComment被保存到localStorage中，我该如何实现？目前，当我从浏览器中删除localStorage数据并计算结果时，结果会被推送到我的resultHistory数组中，只有结果和temperatureUnit会被保存到我想要的localStorage中，但在第二次计算中，resultComment也会被保存。我该如何防止这种情况，或者可以做些什么不同的事情？这里是StackBlitz：https://stackblitz.com/edit/angular-ivy-mdhnnt?file=src%2Fapp%2Fapp.component.html,src%2Fapp%2Fapp.module.ts,src%2Fapp%2Fapp.component.ts,src%2Fapp%2Fapp.component.css
重现问题的步骤：
1.清除本地存储数据并刷新页面，
1.在两个输入中键入数字并点击按钮-〉结果和单位被保存。
1.现在输入不同的数字，然后点击按钮-〉，现在resultComment也被保存了）。忽略奇怪的计算结果。它缺少的部分，我没有添加到StackBlitz。
组分ts

class HistoryResult {
  constructor(
    public result: number,
    public temperatureUnit: string,
    public resultComment?: string
  ) {}
}
  resultHistory: HistoryResult[] = []; 

//in ngOnInit iam initializing resultHistory so it stays on page when i refresh and adding comment to each result
ngOnInit() {
...
..code..
...
    this.resultHistory = JSON.parse(localStorage.getItem('result')) || [];
    this.resultHistory.map((item) => {
      item.resultComment = this.heatIndexService.determineComment(
        item.result,
        item.temperatureUnit
      );
    });
}
onCalculateButtonClick(): void {
    this.result = null;
    this.resultTemperatureUnit = this.temperatureUnit.value;
    if (this.heatIndexForm.invalid) {
      this.heatIndexForm.controls['temperature'].markAsDirty();
      this.heatIndexForm.controls['humidity'].markAsDirty();
      return;
    }
    this.result = this.heatIndexService.calculateHeatIndex(
      this.temperatureValue,
      this.humidityValue,
      this.resultTemperatureUnit.code
    );
    this.heatIndexService.saveResultInLocalStorage(
      this.result,
      this.temperatureUnit.value.code,
      this.resultHistory
    );
    this.resultHistory.map((item) => {
      item.resultComment = this.heatIndexService.determineComment(
        item.result,
        item.temperatureUnit
      );
    });
  }

服务功能

saveResultInLocalStorage(
    result: number,
    unit: string,
    historyResults: HistoryResult[]
  ): void {
    // Check if result is the same as last one
    if (
      historyResults.length === 0 ||
      historyResults.slice(-1)[0].result !== result
    ) {
      historyResults.push(new HistoryResult(result, unit));
      // Remove oldest result if more than 3 results
      if (historyResults.length > 3) {
        historyResults.shift();
      }
      localStorage.setItem('result', JSON.stringify(historyResults));
    }
  }

  determineComment(temperature: number, units: string): string {
    if (units === 'C') {
      temperature = (temperature * 9) / 5 + 32;
    }
    if (temperature >= 75 && temperature <= 90) {
      return 'Caution: fatigue is possible with prolonged exposure and activity. Continuing activity could result in heat cramps.';
    } else if (temperature > 90 && temperature <= 105) {
      return 'Extreme caution: heat cramps and heat exhaustion are possible. Continuing activity could result in heat stroke.';
    } else if (temperature > 105 && temperature <= 130) {
      return 'Danger: heat cramps and heat exhaustion are likely; heat stroke is probable with continued activity.';
    } else {
      return 'Extreme danger: heat stroke is imminent.';
    }
  }

以及显示以前计算结果的HTML

<p-table [value]="resultHistory" [tableStyle]="{'min-width': '50rem'}">
      <ng-template pTemplate="header">
          <tr>
              <th>Heat Index</th>
              <th class="heat-index-effect">Effect on the body</th>
          </tr>
      </ng-template>
      <ng-template pTemplate="body" let-history>
          <tr>
              <td>{{history.result | number : '1.2-2'}}&deg;{{history.temperatureUnit}}</td>
              <td>{{history.resultComment}}</td>
          </tr>
      </ng-template>
  </p-table>