Domain Specific Language Typescript

A domain specific language dsl is a computer language specialized to a particular application domain this is in contrast to a general purpose language gpl which is broadly applicable across domains.

Domain specific language typescript. By contrast languages such as uml are general purpose. They bloat in order to accommodate the tremendous variety of customer use cases. The go like approach would never be possible using features built into the language. Boolean your task is to implement this function such that it evaluates the imported condition json against the context.

Domain specific languages begin their life with a reasonable feature set but often grow over time. This is the type of logic that we put in a domain service instead 2. In this post we ll look at creating a domain specific language within typescript which will allow us to separate our intent from our implementation. How can typescript interfaces be used to validate json objects at runtime.

Building domain models can be done in pure javascript classes. Building an application with ddd is like creating a domain specific language for your problem domain. Param context an object of keys and values return boolean function evaluate condition. In this post we will use typescript as it will provide some beneficial type information to our models.

For client side javascript applications we still have to duplicate some of the server side business logic sometimes for specific use cases. A domain specific language is a notation usually graphical that is designed to be used for a particular purpose. In one of my previous articles i said that domain driven design is declarative. A domain specific language is a language which is designed to target a specific problem such as sql for processing relational data structures or regular expressions for matching patterns in text.

String undefined count 0. In a dsl you can define the types of model element and their relationships and how they are presented on the screen. Typescript is an open source language which builds on javascript one of the world s most used tools by adding static type definitions. Types provide a way to describe the shape of an object providing better documentation and allowing typescript to validate that your code is working correctly.

There are a wide variety of dsls ranging from widely used languages for common domains such as html for web pages down to languages used by only one or a few pieces of software such as. We provide an opinionated typescript sdk for implementing config functions.