yarn add global typescript Setting up your project to emit .d.ts files. Elmify; UNLI Reverse Flight Search; 8. Elmify; UNLI Reverse Flight Search; 8. Introduction . Of particular interest is the app directory: it contains the store and the feature directory, which should hold the major feature of the app as sub-directories. See useQuery for the hook signature and additional details.. The UMD package can be used as a