ng2-bootstrap-base-modified/src/utils/decorators.ts

Native Angular Bootstrap Components Typeahead modified

/*tslint:disable:no-invalid-this */
export function OnChange(defaultValue?:any):any {
  const sufix = 'Change';
  return function OnChangeHandler(target:any, propertyKey:string):void {
    let _key = ` __${propertyKey}Value`;
    Object.defineProperty(target, propertyKey, {
      get():any { return this[_key]; },
      set(value:any):void {
        const prevValue = this[_key];
        this[_key] = value;
        if (prevValue !== value && this[propertyKey + sufix]) {
          this[propertyKey + sufix].emit(value);
        }
      }
    });
  };
}
/* tslint:enable */