This is my web part below, I need to call an API so I can dynamically populate the scope property dropdown that are provided as 'settings' to the web part.

Can I use componentdidmount? Doesn't seem to be working when I try that though.

The API im trying to call is the getEvents()

import { WebPartContext } from '@microsoft/sp-webpart-base';
import { AadHttpClient, HttpClientResponse } from '@microsoft/sp-http';

export interface IUpcomingEventsWebPartProps {
  description: string;
  layoutToggle: boolean;
  headerToggle: boolean;
  tooltipToggle: boolean;
  scope: string;
  dateRange: string;
  category: string;
  context: WebPartContext;

export default class UpcomingEventsWebPart extends BaseClientSideWebPart<IUpcomingEventsWebPartProps> {
  private httpClient: AadHttpClient;
  public getEvents() {
    this.httpClient.post('https://********.azurewebsites.net/api/GetEvents', AadHttpClient.configurations.v1, {
      body: JSON.stringify({
        "RangeStartDate": '2021-01-01',
        "RangeEndDate": '2050-01-01',
    .then((res: HttpClientResponse): Promise<any> => {
      return res.json();
    .then(res => {

  public render(): void {
    const element: React.ReactElement<IUpcomingEventsProps> = React.createElement(
        description: this.properties.description,
        scope: this.properties.scope,
        context: this.context

    ReactDom.render(element, this.domElement);

  protected onDispose(): void {

  protected get dataVersion(): Version {
    return Version.parse('1.0');

  protected getPropertyPaneConfiguration(): IPropertyPaneConfiguration {
    return {
      pages: [
          header: {
            description: strings.PropertyPaneDescription
          groups: [
              groupName: strings.BasicGroupName,
              groupFields: [
                PropertyPaneTextField('description', {
                  label: 'Title'
                PropertyPaneDropdown('scope', {
                  options: [
                    { key: 'All', text: 'All' },
                    { key: 'United Kingdom', text: 'United Kingdom' },
                    { key: 'Germany', text: 'Germany' },
                    { key: 'Mexico', text: 'Mexico' },
                    { key: 'SPAIN', text: 'SPAIN' }
                  selectedKey: 'All',
  • You definitely should be able to make API calls and initiate them from componentDidMount. Where is that in your code though? I don't see componentDidMount in there or anywhere else where you call getEvents. Nov 29, 2021 at 17:49

1 Answer 1


The easiest way to do this would be to load the data in your OnInit() method, and then reference it in your property pane.

Similar thread: SharePoint Framework web parts - dynamic properties pane

Additional Reference:

  1. SharePoint Framework: how to properly dynamically populate dropdown property pane fields

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