prop-types-plus

Another library of custom PropType validators. It is greatly inspired by airbnb/prop-types, which probably already offers the same custom types and more. I just wanted to create my own. 🙃

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Installation

yarn add prop-types-plus

Validators

[!NOTE] Since PropTypes are only useful for developement, when NODE_ENV is set to production mock functions are exported instead of the real validators.

arrayOfShape

Validates the type of the entries in an array in the given order.

Signature

arrayOfShape(shape: PropTypes[])

Usage

import { string, number } from "prop-type";
import { arrayOfShape } from "prop-types-plus";

const propTypes = {
  foo: arrayOfShape([string, number.isRequired]),
  fooRequired: arrayOfShape([string, number.isRequired]).isRequired
};

requiredIf

Tests whether a prop is required based on a given condition.

Signature

requiredIf(
  type: PropTypes,
  condition: (props: object) => boolean,
  errorMessage?: string
)

Usage

import { string } from "prop-type";
import { requiredIf } from "prop-types-plus";

const propTypes = {
  foo: requiredIf(
    string,
    (props) => props.bar
    "The prop `foo` is required when there is `bar`."
  )
};

stringOfShape

Tests whether a string match the given regex.

Signature

stringOfShape(regex: RegExp)

Usage

import { stringOfShape } from "prop-types-plus";

const propTypes = {
  foo: stringOfShape(/^#.+/),
  fooRequired: stringOfShape(/^#.+/).isRequired
};

unnecessaryWhen

Tests whether a prop is unnecessary based on a given condition.

Signature

unnecessaryWhen(
  type: PropTypes,
  condition: (props: object) => boolean,
  errorMessage?: string
)

Usage

import { string } from "prop-type";
import { unnecessaryWhen } from "prop-types-plus";

const propTypes = {
  foo: requiredIf(
    string,
    (props) => props.bar
    "The prop `foo` is unnecessary when there is `bar`."
  )
};