如何在 Angular 中呈现后端数据

Question

我有后端数据显示，但我正在尝试使用扩展面板呈现数据，但不知道该怎么做如果我能得到任何建议或帮助，我将不胜感激。

TS


  constructor(private HelpService: HelpService) {}
  helpSection: {[key: string]: HelpSection } = {};

  helpSection$ = this.HelpService.getHelpSection();


  ngOnInit(): void {

    this.HelpService.getHelpSection().subscribe(() => {
    } )

  }

HTML

<mat-expansion-panel>
   <mat-expansion-panel-header style="align-items: center;">
    <div *ngFor= "let help of helpSection$ | async">{{help.sectionName}}</div>
</mat-expansion-panel-header>
   <a mat-list-item (click)="clicked(1)">Here it will display subSections</a>
</mat-expansion-panel>

Answer 1

*ngFor 需要在“mat-expansion-panel”标签中

<mat-expansion-panel *ngFor="let help of helpSection$ | async">

Answer 2

您可以遍历父级 <mat-expansion-panel>

<mat-expansion-panel class="exp-panel" *ngFor= "let help of helpSection$ | async">
  <mat-expansion-panel-header style="align-items: center;">
     <div >{{help.sectionName}}</div>
  </mat-expansion-panel-header>
  <a mat-list-item (click)="clicked(1)">Here it will display subSections</a>
</mat-expansion-panel>

造型

.exp-panel {
  padding: 30px;
  margin-bottom: 20px;
}

如何在 Angular 中呈现后端数据

How to render backend data in Angular

html

api

rendering

typescript

angular