Quick Experiment with Node and Express with TypeScript.

The compilerOptions is a mandatory field that needs to be specified. The options used in the config above are:

• target allows us to specify the target JavaScript version that compiler will output.
• module allows us to use a module manager in the compiled JavaScript code. The commonjs is supported and is a standard in Node.js.
• rootDir is an option that specifies where the TypeScript files are located inside the Node.js project.
• outDir specifies where the output of the compiled is going to be located.
• esModuleInterop allows us to compile ES6 modules to commonjs modules.
• strict is an option that enables strict type-checking options.