It's possible that your basic autocomplete example is not working due to certain factors, such as incorrect code, missing libraries, conflicts with other libraries, or incorrect configuration. To troubleshoot, you should try to identify the problem by debugging the code and checking the configuration. You can also try using another library or version of the library that you are using to see if the issue is resolved. Click here

@iqitlab You probably use strict type checking in the tsconfig, which requires all types to be defined and all variables initialized. Please try to update the TS code to:

  searchText = new Subject<string>();
  results: Observable<string[]>;
  data: any = [
    'red',
    'green',
    'blue',
    'cyan',
    'magenta',
    'yellow',
    'black',
  ];

  constructor() {
    this.results = this.searchText.pipe(
      startWith(''),
      map((value: string) => this.filter(value))
    );
  }

  filter(value: string): string[] {
    const filterValue = value.toLowerCase();
    return this.data.filter((item: string) => item.toLowerCase().includes(filterValue));
  }