JSONClipper

A simple utility to extract a part of json with a provides schema, also it is available to use default values if it is not available in the original json.

Install

npm i jsonclipper -D

Usage

import {compileSchema} from "jsonclipper";

// create a schema
const schema = {
    _type: "object",
    _properties: {
        name: {_type: "string"},
        age: {_type: "number"},
    }
}

const json = {
    name: "John",
    age: 26,
    job: "Developer",
};

const result = compileSchema(schema, json); // {name: "John", age: 26}

Schema formats

String:

const schema1 = {
    _type: "string",
}

Number with default value:

const schema2 = {
    _type: "number",
    _default: 0
}

Boolean:

const schema3 = {
    _type: "boolean",
    _removeEmpty: true // remove the field if value is not provided, and has priority over `default` value
}

Object:

const schema4 = {
    _type: "object",
    _properties: {
        key1: {_type: "number"},
        key2: {_type: "string"},
    }
}

Array of objects:

const schema5 = {
    _type: "array",
    _items: {
        _type: "object",
        _properties: {
            key1: {_type: "number"},
        }
    }
}

Array of multiple types:

const schema6 = {
    _type: "array",
    _items: [
        {_type: "string"},
        {_type: "number"},
    ]
}