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SPF019913: Ensure that Web Part properties used in code are defined in the Web Part manifest

All Web Part properties used in code must be defined in the Web Part manifest

CheckId SPF019913
TypeName DefineWebPartPropertiesSpecifiedInCodeInTheManifest
Severity CriticalError
Type JavaScriptFile

Whenever defining a Web Part property in the Web Part manifest the same property should be defined in Web Part's code so that it's configurable through the property pane.


  "$schema": "../../../node_modules/@microsoft/sp-module-interfaces/lib/manifestSchemas/jsonSchemas/clientSideComponentManifestSchema.json",

  "id": "8908df13-a965-4445-9c48-ecec77c44be4",
  "alias": "WeatherWebPart",
  "componentType": "WebPart",
  "version": "0.0.1",
  "manifestVersion": 2,

  "preconfiguredEntries": [{
    "groupId": "8908df13-a965-4445-9c48-ecec77c44be4",
    "group": { "default": "Default" },
    "title": { "default": "Weather" },
    "description": { "default": "Shows weather for the given place" },
    "officeFabricIconFontName": "Sunny",
    "properties": {
      "location": ""

import { Version } from '@microsoft/sp-core-library';
import {
} from '@microsoft/sp-webpart-base';
import { escape } from '@microsoft/sp-lodash-subset';

import styles from './Weather.module.scss';
import * as strings from 'weatherStrings';
import { IWeatherWebPartProps } from './IWeatherWebPartProps';

export default class WeatherWebPart extends BaseClientSideWebPart<IWeatherWebPartProps> {
  public render(): void {
    // omitted for brevity

  protected getPropertyPaneConfiguration(): IPropertyPaneConfiguration {
    return {
      pages: [
          header: {
            description: strings.PropertyPaneDescription
          groups: [
              groupName: strings.DataGroupName,
              groupFields: [
                PropertyPaneTextField('location', {
                  label: strings.LocationFieldName


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