React Known Props

About 700 props React recognizes.

• HTML & SVG props valid on any element (global props).
• HTML & SVG element specific props.
• ARIA props (includes role).
• React event props.
• React specific props.
• Options you can set.

HTML attributes and React Properties are mixed together, the rationale is that if react accepts the prop, we include it. see #25 for more info

Install

install with

yarn add react-known-props

npm i react-known-props

then use with

import {
  getAllProps,
  getElementProps,
  getEventProps,
  getGlobalProps
} from "react-known-props";

const {
  getAllProps,
  getElementProps,
  getEventProps,
  getGlobalProps
} = require("react-known-props");

API

Functions provided

• getAllProps
• getElementProps
• getEventProps
• getGlobalProps

All functions return the props as strings in an array.

Element names are case-sensitive

• HTML elements are all lowercase
• SVG elements are lowercase and camelCase

See options below.

getAllProps

Gets all possible props: Global props, element specific props, event props and ARIA props including role.

// argument 1 (optional): an options object.

getAllProps();
getAllProps({ legacy: true });

// this
getAllProps().length;

// returns
675;

getElementProps

Gets all props valid on the HTML/SVG element provided as argument, plus all ARIA props, including role. Doesn't include event props.

// argument 1: string. Element to get props for.
// argument 2: (optional) an options object.

getElementProps("img")
getElementProps("iframe")
getElementProps("ellipse")
getElementProps("table", {legacy: true})
getElementProps("audio", {onlyReact: true})
getElementProps("polygon", {onlyReact: true})

// this
getElementProps("img")

// returns
[ 'align',
      'alt',
      'crossOrigin',
      'crossorigin',
      'height',
      'isMap',
      'ismap',
      'sizes',
      (...)
]

getEventProps

Gets React's event props only.

// arguments: none.

// this
getEventProps()

// returns
[ 'onBlur',
      'onChange',
      'onClick',
      'onContextMenu',
      'onCopy',
      'onCut',
      (...)
]

getGlobalProps

Gets all HTML and SVG props valid on any element, plus all ARIA props including role.

// argument 1 (optional): an options object.

getGlobalProps()
getGlobalProps({onlyReact: true})

// this
getGlobalProps()

// returns
[
  'accessKey',
  'accesskey',
  'autoCapitalize',
  'autocapitalize',
  'className',
  'class',
  'contentEditable',
  'contenteditable',
  (...)
]

Options

• legacy: boolean.
• onlyReact: boolean.
• sort: boolean.

legacy

Default: false.

Whether or not to return deprecated HTML props bgcolor, border and color for the elements that still use them.

// examples:

// will include bgcolor in the props
getAllProps({ legacy: true });

// will omit legacy props
getAllProps({ legacy: false });

// same as {legacy: false}
getAllProps();

onlyReact

Default: false.

Whether to return only the React prop, or the HTML prop and the React prop. In React, some HTML props are renamed to camelCase (e.g. class -> className) and using the HTML lowercase name will show a warning. The same happens with SVG. Since the warning can be educational this option is off by default.

// examples:

// will include class and className, for and htmlFor, etc...
getElementProps("label");

// same as above
getElementProps("label", { onlyReact: false });

// no duplication, only React props are returned (itemID, tabIndex, autoCapitalize, className, htmlFor, etc...)
getGlobalProps({ onlyReact: true });

sort

Default: false*.

Sort the props alphabetically before returning them. It uses Array.prototype.sort.
*Not supported on getEventProps. Please sort it manually.

// examples:

getAllProps();
// not sorted
[
  (...)
  'aria-valuetext',
  'role',
  'accessKey',
  'accesskey',
  'autoCapitalize',
  'autocapitalize',
  'className',
  'class',
  (...)
]

// sorted
getAllProps({ sort: true });
getGlobalProps({ sort: true });

Incompatible SVG props not included.

React doesn't like all SVG props, some prevent it from compiling and print an error to the console. They are:

• Props prefixed by xml:
• Props prefixed by xlink:
• Props prefixed by on (events)
• ev:event

Need more props?

I'd use these packages:

• Void HTML elements (self closing, e.g. <img/>): yarn add void-elements
• Css props: yarn add known-css-properties

Contributing

Fork, make changes, run the build:lists script and send a PR. build:lists takes the stuff in src/generator and makes the files in src/generated. This is for performance reasons.

All data pulled from MDN web docs, official React docs, the ARIA specification and SVG specification. MDN can be a deep website to dig for info, I'm sure there are more props (specially legacy) waiting to be added by someone willing to look into every element page.

⚛️ React is awesome 💫