Fluent TypeScript JSON Schema Builder

This builder takes advantage of TypeScript Generics to provide a Fluent JSON Schema builder, with full IntelliSense support. You don't need to worry about knowing the JSON Schema specification upfront, instead explore it while typing code.

Builder is packaged as ECMAScript 5. This means it can be used in vanilla JS projects, but you will not get a rich IntelliSense support.

⚠ Builder aims to implement Draft-V4 See wiki for all supported features

const schema = new Schema<Model>()
    .with(m => m.StringProp, /^[A-z]+\.[A-z]+$/)
    .with(m => m.NumberProp, x => x > 15)
    .with(m => m.ObjProp.Lvl2ObjProp.Lvl3StrProp, "specificValue")
    .with(m => m.ArrayProp, new ArraySchema({
        length: x => x < 10,
    }))
    .build();

Produces following schema (click to expand)

{
    "type": "object",
    "properties": {
        "StringProp": {
            "type": "string",
            "pattern": "^[A-z]+\\.[A-z]+$"
        },
        "NumberProp": {
            "type": "number",
            "minimum": 16
        },
        "ObjProp": {
            "title": "ObjProp",
            "type": "object",
            "properties": {
                "Lvl2ObjProp": {
                    "title": "Lvl2ObjProp",
                    "type": "object",
                    "properties": {
                        "Lvl3StrProp": {
                            "type": "string",
                            "pattern": "specificValue"
                        }
                    },
                    "required": [
                        "Lvl3StrProp"
                    ]
                }
            },
            "required": [
                "Lvl2ObjProp"
            ]
        },
        "ArrayProp": {
            "type": "array",
            "maxItems": 9
        }
    },
    "required": [
        "StringProp",
        "NumberProp",
        "ObjProp",
        "ArrayProp"
    ]
}

For many more examples, check our Wiki