html文件

<div fxFlex fxLayoutAlign="left top" style="display: block">
<!--  <mat-card appearance="raised" style="max-height: 80vh; overflow-y: auto;">-->
  <div>
    <button mat-raised-button (click)="addColumn()"> Add</button>
    <button mat-raised-button (click)="removeColumn()"> Remove </button>
    <button mat-raised-button (click)="shuffle()"> Shuffle </button>
  </div>
  <table mat-table [dataSource]="data" class="mat-elevation-z8">
    <ng-container [matColumnDef]="column" *ngFor="let column of displayedColumns">
      <th mat-header-cell *matHeaderCellDef> {{column}} </th>
      <td mat-cell *matCellDef="let element"> {{element[column]}} </td>
    </ng-container>
    <tr mat-header-row *matHeaderRowDef="columnsToDisplay"></tr>
    <tr mat-row *matRowDef="let row; columns: columnsToDisplay;"></tr>
  </table>
</div>

ts文件

import { Component, OnInit } from '@angular/core';
import { UserService } from '@core/http/user.service';
import { AuthUser, User } from '@shared/models/user.model';
import { Authority } from '@shared/models/authority.enum';
import { PageComponent } from '@shared/components/page.component';
import { Store } from '@ngrx/store';
import { AppState } from '@core/core.state';
import { UntypedFormBuilder, UntypedFormGroup, Validators } from '@angular/forms';
import { HasConfirmForm } from '@core/guards/confirm-on-exit.guard';
import { ActionAuthUpdateUserDetails } from '@core/auth/auth.actions';
import { environment as env } from '@env/environment';
import { TranslateService } from '@ngx-translate/core';
import { ActionSettingsChangeLanguage } from '@core/settings/settings.actions';
import { ActivatedRoute } from '@angular/router';
import { isDefinedAndNotNull } from '@core/utils';
import { getCurrentAuthUser } from '@core/auth/auth.selectors';
import { AuthService } from '@core/auth/auth.service';

export interface PeriodicElement {
  name: string;
  position: number;
  weight: number;
  symbol: string;
}

const ELEMENT_DATA: PeriodicElement[] = [
  {position: 1, name: 'Hydrogen', weight: 1.0079, symbol: 'H'},
  {position: 2, name: 'Helium', weight: 4.0026, symbol: 'He'},
  {position: 3, name: 'Lithium', weight: 6.941, symbol: 'Li'},
  {position: 4, name: 'Beryllium', weight: 9.0122, symbol: 'Be'},
  {position: 5, name: 'Boron', weight: 10.811, symbol: 'B'},
  {position: 6, name: 'Carbon', weight: 12.0107, symbol: 'C'},
  {position: 7, name: 'Nitrogen', weight: 14.0067, symbol: 'N'},
  {position: 8, name: 'Oxygen', weight: 15.9994, symbol: 'O'},
  {position: 9, name: 'Fluorine', weight: 18.9984, symbol: 'F'},
  {position: 10, name: 'Neon', weight: 20.1797, symbol: 'Ne'},
];

@Component({
  selector: 'tb-bz',
  templateUrl: './bz.component.html',
  styleUrls: ['./bz.component.scss']
})
export class bzComponent extends PageComponent implements OnInit, HasConfirmForm {

  authorities = Authority;
  profile: UntypedFormGroup;
  user: User;
  languageList = env.supportedLangs;
  displayedColumns: string[] = ['name', 'weight', 'symbol', 'position'];
  columnsToDisplay: string[] = this.displayedColumns.slice();
  data: PeriodicElement[] = [
    {position: 1, name: 'Hydrogen', weight: 1.0079, symbol: 'H'},
    {position: 2, name: 'Helium', weight: 4.0026, symbol: 'He'},
    {position: 3, name: 'Lithium', weight: 6.941, symbol: 'Li'},
    {position: 4, name: 'Beryllium', weight: 9.0122, symbol: 'Be'},
    {position: 5, name: 'Boron', weight: 10.811, symbol: 'B'},
    {position: 6, name: 'Carbon', weight: 12.0107, symbol: 'C'},
    {position: 7, name: 'Nitrogen', weight: 14.0067, symbol: 'N'},
    {position: 8, name: 'Oxygen', weight: 15.9994, symbol: 'O'},
    {position: 9, name: 'Fluorine', weight: 18.9984, symbol: 'F'},
    {position: 10, name: 'Neon', weight: 20.1797, symbol: 'Ne'},
  ];
  private readonly authUser: AuthUser;

  constructor(protected store: Store<AppState>,
              private route: ActivatedRoute,
              private userService: UserService,
              private authService: AuthService,
              private translate: TranslateService,
              public fb: UntypedFormBuilder) {
    super(store);
    this.authUser = getCurrentAuthUser(this.store);
  }

  ngOnInit() {
    // this.buildProfileForm();
    // this.userLoaded(this.route.snapshot.data.user);
  }
  addColumn() {
    console.log(this.data)
    // const randomColumn = Math.floor(Math.random() * this.displayedColumns.length);
    let arr = this.data
    arr.push({position: this.data.length+1, name: 'Neon', weight: 20.1797, symbol: 'Ne'})
    this.data = arr.slice();
  }

  removeColumn() {
    if (this.data.length) {
      this.data.pop();
    }
  }

  shuffle() {
    let currentIndex = this.columnsToDisplay.length;
    while (0 !== currentIndex) {
      let randomIndex = Math.floor(Math.random() * currentIndex);
      currentIndex -= 1;

      // Swap
      let temp = this.columnsToDisplay[currentIndex];
      this.columnsToDisplay[currentIndex] = this.columnsToDisplay[randomIndex];
      this.columnsToDisplay[randomIndex] = temp;
    }
  }
  private buildProfileForm() {
    this.profile = this.fb.group({
      email: ['', [Validators.required, Validators.email]],
      firstName: [''],
      lastName: [''],
      phone: [''],
      language: [''],
      homeDashboardId: [null],
      homeDashboardHideToolbar: [true]
    });
  }

  save(): void {
    this.user = {...this.user, ...this.profile.value};
    if (!this.user.additionalInfo) {
      this.user.additionalInfo = {};
    }
    this.user.additionalInfo.lang = this.profile.get('language').value;
    this.user.additionalInfo.homeDashboardId = this.profile.get('homeDashboardId').value;
    this.user.additionalInfo.homeDashboardHideToolbar = this.profile.get('homeDashboardHideToolbar').value;
    this.userService.saveUser(this.user).subscribe(
      (user) => {
        this.userLoaded(user);
        this.store.dispatch(new ActionAuthUpdateUserDetails({ userDetails: {
            additionalInfo: {...user.additionalInfo},
            authority: user.authority,
            createdTime: user.createdTime,
            tenantId: user.tenantId,
            customerId: user.customerId,
            email: user.email,
            phone: user.phone,
            firstName: user.firstName,
            id: user.id,
            lastName: user.lastName,
          } }));
        this.store.dispatch(new ActionSettingsChangeLanguage({ userLang: user.additionalInfo.lang }));
        this.authService.refreshJwtToken(false);
      }
    );
  }

  private userLoaded(user: User) {
    this.user = user;
    this.profile.reset(user);
    let lang;
    let homeDashboardId;
    let homeDashboardHideToolbar = true;
    if (user.additionalInfo) {
      if (user.additionalInfo.lang) {
        lang = user.additionalInfo.lang;
      }
      homeDashboardId = user.additionalInfo.homeDashboardId;
      if (isDefinedAndNotNull(user.additionalInfo.homeDashboardHideToolbar)) {
        homeDashboardHideToolbar = user.additionalInfo.homeDashboardHideToolbar;
      }
    }
    if (!lang) {
      lang = this.translate.currentLang;
    }
    this.profile.get('language').setValue(lang);
    this.profile.get('homeDashboardId').setValue(homeDashboardId);
    this.profile.get('homeDashboardHideToolbar').setValue(homeDashboardHideToolbar);
  }

  confirmForm(): UntypedFormGroup {
    return this.profile;
  }

  isSysAdmin(): boolean {
    return this.authUser.authority === Authority.SYS_ADMIN;
  }
}