- Understanding a RESTful API using Node.js, TypeScript and Pokemon
- Import & Read Local JSON Files in Angular 7/8
- MakeTypes from JSON samples
- Compiling TypeScript
Understanding a RESTful API using Node.js, TypeScript and PokemonThis tip is not specifically about Angular, but rather about TypeScript. This is quite simple, and using it in your controller is straightforward… as long as you know what the JSON payload looks like. What is a race? What fields does it have? This is easy enough to remember in a small application, when you just developed the backend service. Except for the syntactic sugar class, arrow function, string interpolationnot much. The object returned by response. But TypeScript, despite having similar concepts, is very different from Java. TypeScript allows defining interfaces which, unlike in Java, can define instance fields. For example:. TypeScript interfaces, a bit like Java generic types, are a purely compile-time construct. But for the TypeScript compiler, it defines the shape of an object. And you can thus define your service as. At runtime, startInstant will be undefined. More importantly, when you or a colleague have to modify a component using a race, you can just look at the Race interface definition to instantly know what a race object looks like. And you can rely on your IDE to provide reliable auto-completion. Bonus point: document the fields! Pay what you want and support charity! JB Nizet Github Twitter. Become a ninja with Angular Pay what you want and support charity!
Import & Read Local JSON Files in Angular 7/8
Running tsc locally will compile the closest project defined by a tsconfig. TypeScript 3. Get the latest version today! Allow default imports from modules with no default export. This does not affect code emit, just typechecking. Base directory to resolve non-relative module names. See Module Resolution documentation for more details. Builds this project and all of its dependencies specified by Project References. Note that this flag is not compatible with others on this page. See more here. Ensure TypeScript can determine where to find the outputs of the referenced project to compile project. Provide full support for iterables in for. Emit design-type metadata for decorated declarations in source. See issue for details. Generates a cpu profile at the given path. Passing an existing directory name instead of a file path will cause a timestamp-named profile to be generated in that directory instead. Import emit helpers e. This file is controlled by the --tsBuildInfoFile flag. Emit the source alongside the sourcemaps within a single file; requires --inlineSourceMap or --sourceMap to be set. Support JSX in. See JSX. List of library files to be included in the compilation. Symbol Note: If --lib is not specified a default list of libraries are injected. The locale to use to show error messages, e. Specifies the location where debugger should locate map files instead of generated locations. Use this flag if the. The location specified will be embedded in the sourceMap to direct the debugger where the map files will be located. This flag will not create the specified path and generate the map files in that location. Instead, create a post build step that moves the files to the specified path. Only applicable with --allowJs. Determine how modules get resolved. Either "Node" for Node. Use the specified end of line sequence to be used when emitting files: "crlf" windows or "lf" unix. Concatenate and emit output to single file. The order of concatenation is determined by the list of files passed to the compiler on the command line along with triple-slash references and imports.
MakeTypes from JSON samples