mempool/frontend/src/app/lightning/statistics-chart/lightning-statistics-chart.component.html

<div [class]="widget === false ? 'full-container' : ''">

  <div class="card-header mb-0 mb-md-4" [style]="widget ? 'display:none' : ''">
    <span i18n="mining.hashrate-difficulty">Hashrate & Difficulty</span>
    <button class="btn" style="margin: 0 0 4px 0px" (click)="onSaveChart()">
      <fa-icon [icon]="['fas', 'download']" [fixedWidth]="true"></fa-icon>
    </button>
  </div>

  <div [class]="!widget ? 'chart' : 'chart-widget'" echarts [initOpts]="chartInitOptions" [options]="chartOptions" (chartInit)="onChartInit($event)"></div>
  <div class="text-center loadingGraphs" *ngIf="isLoading">
    <div class="spinner-border text-light"></div>
  </div>

</div>