Dynamic Rules

the most fun and fast way to eval javascript objects

Usage

1. Passing an object and rules, getting the result.

const dynamicRules = require('dynamic-rules');

// This can be any javascript object
const myModel = {
	amount: 118,
	subtotal: 100,
	taxes: 18,
	typeDocument: {
		name: 'INVOICE',
	},
};

// This is the config dynamic-rules needs.
// model represents the parent of the object
const config = {
	condition: 'model.typeDocument.name === "INVOICE"',
	formula: '(model.subtotal * model.amount) + 10',
};

const result = dynamicRules.execute(myModel, config);

console.log(result);

/*
	{
		meetCondition: true,
		formula: 11790
	}
*/

2. Merging the result into your object

const dynamicRules = require('dynamic-rules');

// This can be any javascript object
const myModel = {
	amount: 118,
	subtotal: 100,
	taxes: 18,
	typeDocument: {
		name: 'INVOICE',
	},
};

// This is the config dynamic-rules needs.
// model represents the parent of the object
const config = {
	merge: true, // make a copy of your model and return the result on it.
	condition: 'model.typeDocument.name === "INVOICE"',
	formula: '(model.subtotal * model.amount) + 10',
};

const result = dynamicRules.execute(myModel, config);

console.log(result);

/*
	{
		model: {
			amount: 118,
			subtotal: 100,
			taxes: 18,
			typeDocument: {
				name: 'INVOICE',
			},
		}
		condition: true,
		formula: 11790
	}
*/