typescript-json-schema/example/misc/dimension.ts

typescript-json-schema generates JSON Schema files from your Typescript sources

// Typescript-JSON-Schema can handle defaults in classes as illustrated below
class Dimension {
    /** Width in cm */
        width: number = 10;

    /** Height in cm */
        height: number = 10;

    /** Length in cm */
        length:  number = 10;
}