<div class="content-page">
    <mat-card>
        <mat-card-header>
            <mat-toolbar class="toolbar">
                <span>RegExp Creator（正则表达式生成）</span>
                <span class="toolbar-spacer"></span>
            </mat-toolbar>
        </mat-card-header>
        <mat-card-content>
            <div class="option-row">
                <button mat-raised-button *ngFor="let key of regexpData.keys()" (click)="handleText(key)">{{key}}</button>
            </div>
      