Object Shape Validator

Object shape validator inspired by React.js prop-types

Installation

Use the npm to install the module

npm install object-shape-validator

Usage

Creating basic shape and validate it:

import ObjectShape from 'object-shape-validator';

const shape = new ObjectShape({
  title: ObjectShape.string,
  tags: ObjectShape.arrayOf(ObjectShape.string),
  published: ObjectShape.bool
});

const object = {
  title: 'Example title',
  tags: ['news', 'advertisement'],
  published: false
};

const errors = shape.validate(object);
console.log(errors);

Validate with static method:

const errors = ObjectShape.validate(shape, object);

console.log(errors);

Options argument

You can also pass additional parameters as the last argument to validation function

const errors = shape.validate(object, {
  suppressOwnPropertiesValidation: true
});

console.log(errors);

List of options

• suppressOwnPropertiesValidation: Disable validation for own properties. Useful when is needed to validate just few properties of an object to match the shape

Build-in types

ObjectShape.string - validates if value is string

const shape = new ObjectShape({
  title: ObjectShape.string
});

ObjectShape.number - validates if value is number

const shape = new ObjectShape({
  age: ObjectShape.number
});

ObjectShape.func - validates if value is func

const shape = new ObjectShape({
  test: ObjectShape.func
});

ObjectShape.bool - validates if value is boolean

const shape = new ObjectShape({
  published: ObjectShape.bool
});

ObjectShape.array - validates if value is array

const shape = new ObjectShape({
  items: ObjectShape.array
});

ObjectShape.object - validates if value is object

const shape = new ObjectShape({
  user: ObjectShape.object
});

ObjectShape.instanceOf - validates if value is instanceof class

class Animal {
  constuctor(type) {
    this.type = type;
  }
}

class Dog extends Animal {
  constructor() {
    super('dog');
  }
}

const shape = new ObjectShape({
  pet: ObjectShape.instanceOf(Dog)
});

ObjectShape.oneOf - validates if value is equal to one of the values

const shape = new ObjectShape({
  value: ObjectShape.oneOf(['First', 'Second'])
});

ObjectShape.oneOfType - validates if value is one of the types

const shape = new ObjectShape({
  value: ObjectShape.oneOfType([
    ObjectShape.string,
    ObjectShape.bool
  ])
});

ObjectShape.arrayOf - validates if value is array of type

const shape = new ObjectShape({
  items: ObjectShape.arrayOf(ObjectShape.string)
});

ObjectShape.objectOf - validates if value is a valid shape

const shape = new ObjectShape({
  user: {
    fname: ObjectShape.string,
    lname: ObjectShape.string,
    age: ObjectShape.number 
  }
});

ObjectShape.custom - custom validator function

const shape = new ObjectShape({
  value: ObjectShape.custom((value, key) => value === 'test' || `${key} is not equals to 'test'`)
});

or

const shape = new ObjectShape({
  value: (value, key) => value === 'test' || `${key} is not equals to 'test'`,
});

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

License

MIT