vue-types

vue-types

Prop type definitions for Vue.js. Compatible with both Vue 1.x and 2.x

Introduction

vue-types is a collection of configurable prop type definitions for Vue.js components, inspired by React.PropTypes.

When to use

While basic prop type definition in Vue is simple and convenient, detailed prop validation can become verbose on complex components. This is the case for vue-types.

Instead of:

export default {
  props: {
    id: {
      type: Number,
      default: 10
    },
    name: {
      type: String,
      required: true
    },
    age: {
      type: Number,
      validator(value) {
        return Number.isInteger(value)
      }
    },
    nationality: String
  },
  methods: {
    // ...
  }
};

You may write:

import VueTypes from 'vue-types';

export default {
  props: {
    id: VueTypes.number.def(10),
    name: VueTypes.string.isRequired,
    age: VueTypes.integer,
    // No need for `default` or `required` key, so keep it simple
    nationality: String 
  },
  methods: {
    // ...
  }
}

Installation

NPM

npm install vue-types --save

Documentation

Native Types

Most native types come with a default value, a .def() method to reassign the default value for the current prop and a isRequired flag to set the required: true key

const numProp = vueTypes.number
// numProp === { type: Number, default : 0}

const numPropCustom = vueTypes.number.def(10)
// numPropCustom ===  { type: Number, default : 10}

const numPropRequired = vueTypes.number.isRequired
// numPropCustom ===  { type: Number, required : true}

const numPropRequiredCustom = vueTypes.number.def(10).isRequired
// numPropRequiredCustom ===  { type: Number, default: 10, required : true}

VueTypes.any

Validates any type of value and has no default value.

VueTypes.array

Validates that a prop is an array primitive.

• Default: Array

VueTypes.bool

Validates boolean props.

• default: true

VueTypes.func

Validates that a prop is a function.

• default: an empty function

VueTypes.number

Validates that a prop is a number.

• default: 0

VueTypes.integer

Validates that a prop is an integer (uses Number.isInteger).

• default: 0

VueTypes.object

VueTypes.object

Validates that a prop is an object.

• default: Object

VueTypes.string

VueTypes.string

Validates that a prop is a string.

• default: ''

Custom Types

Custom types have not default value, a .def() method to assign a default value for the current prop and a isRequired flag to set the required: true key

const oneOfPropDefault = vueTypes.oneOf([0, 1]).def(1)
// oneOfPropCustom.default === 1

const oneOfPropRequired = vueTypes.oneOf([0, 1]).isRequired
// oneOfPropCustom.required ===  true

const oneOfPropRequiredCustom = vueTypes.oneOf([0, 1]).def(1).isRequired
// oneOfPropRequiredCustom.default ===  1
// oneOfPropRequiredCustom.required === true

VueTypes.instanceOf()

class Person {
  // ...
}

export default {
  props: {
    user: VueTypes.instanceOf(Person)
  }
}

Validates that a prop is an instance of a JavaScript constructor. This uses JavaScript's instanceof operator.

VueTypes.oneOf()

VueTypes.oneOf(arrayOfValues)

Validates that a prop is one of the provided values.

export default {
  props: {
    genre: VueTypes.oneOf(['action', 'thriller'])
  }
}

VueTypes.oneOfType()

Validates that a prop is an object that could be one of many types. Accepts both simple and vue-types types.

export default {
  props: {
    theProp: VueTypes.oneOfType([
      String, 
      VueTypes.integer,
      VueTypes.instanceOf(Person)
    ])
  }
}

VueTypes.arrayOf()

Validates that a prop is an array of a certain type.

export default {
  props: {
    theProp: VueTypes.arrayOf(String)
  }
}

//accepts: ['my', 'string']
//rejects: ['my', 1]

VueTypes.objectOf()

Validates that a prop is an object with values of a certain type.

export default {
  props: {
    userData: VueTypes.objectOf(String)
  }
}

//accepts: userData = {name: 'John', surname: 'Doe'}
//rejects: userData = {name: 'John', surname: 'Doe', age: 30}

VueTypes.shape()

Validates that a prop is an object taking on a particular shape. Accepts both simple and vue-types types. You can set shape's types as required but (obviously) you cannot use .def()

export default {
  props: {
    userData: VueTypes.shape({
      name: String,
      age: VueTypes.integer,
      id: VueTypes.integer.isRequired
    })
  }
}

//accepts: userData = {name: 'John', age: 30, id: 1}
//rejects: userData = {name: 'John', age: 'wrong data', id: 1}
//rejects: userData = {name: 'John', age: 'wrong data'} --> missing required `id` key

By default .shape() won't validate objects with properties not defined in the shape. To allow partial matching use the loose flag:

export default {
  props: {
    userData: VueTypes.shape({
      name: String,
      id: VueTypes.integer.isRequired
    }),
    userDataLoose: VueTypes.shape({
      name: String,
      id: VueTypes.integer.isRequired
    }).loose
  }
}

//accepts: userData = {name: 'John', id: 1}
//rejects: userData = {name: 'John', age: 30, id: 1}
//accepts: userData2 = {name: 'John', age: 30, id: 1} --> loose matching

License

MIT

Copyright (c) 2016 Marco Solazzi