sort-prop-types.md

Enforce propTypes declarations alphabetical sorting (react/sort-prop-types)

Some developers prefer to sort prop type declaratioms alphabetically to be able to find necessary declaration easier at the later time. Others feel that it adds complexity and becomes burden to maintain.

Rule Details

This rule checks all components and verifies that all propTypes declarations are sorted alphabetically. A spread attribute resets the verification. The default configuration of the rule is case-sensitive.

Examples of incorrect code for this rule:

var Component = createReactClass({
  propTypes: {
    z: PropTypes.number,
    a: PropTypes.any,
    b: PropTypes.string
  },
...
});

type Props = {
  z: number,
  a: any,
  b: string
}
class Component extends React.Component<Props> {
  ...
}

class Component extends React.Component {
  static propTypes = {
    z: PropTypes.any,
    y: PropTypes.any,
    a: PropTypes.any
  }
  render() {
    return <div />;
  }
}

Examples of correct code for this rule:

var Component = createReactClass({
  propTypes: {
    a: PropTypes.number,
    b: PropTypes.any,
    c: PropTypes.string
  },
...
});

type Props = {
  a: string,
  b: any,
  c: string,
}
class Component extends React.Component<Props> {
  ...
}

class Component extends React.Component {
  static propTypes = {
    a: PropTypes.any,
    b: PropTypes.any,
    c: PropTypes.any
  }
  render() {
    return <div />;
  }
}

Rule Options

...
"react/sort-prop-types": [<enabled>, {
  "callbacksLast": <boolean>,
  "ignoreCase": <boolean>,
  "requiredFirst": <boolean>,
  "sortShapeProp": <boolean>,
  "noSortAlphabetically": <boolean>
}]
...

ignoreCase

When true the rule ignores the case-sensitivity of the declarations order.

callbacksLast

When true, propTypes for props beginning with "on" must be listed after all other props:

var Component = createReactClass({
  propTypes: {
    a: PropTypes.number,
    z: PropTypes.string,
    onBar: PropTypes.func,
    onFoo: PropTypes.func,
  },
...
});

requiredFirst

When true, prop types for required props must be listed before all other props:

var Component = createReactClass({
  propTypes: {
    barRequired: PropTypes.any.isRequired,
    fooRequired: PropTypes.any.isRequired,
    a: PropTypes.number,
    z: PropTypes.string,
  },
...
});

sortShapeProp

When true, props defined in PropTypes.shape must be sorted via the same rules as the top-level props:

var Component = createReactClass({
  propTypes: {
    a: PropTypes.number,
    b: PropTypes.shape({
      d: PropTypes.number,
      e: PropTypes.func,
      f: PropTypes.bool,
    }),
    c: PropTypes.string,
  },
...
});

noSortAlphabetically

When true, alphabetical order is not enforced:

var Component = createReactClass({
  propTypes: {
    barRequired: PropTypes.any.isRequired,
    z: PropTypes.string,
    a: PropTypes.number,
  },
...
});

When Not To Use It

This rule is a formatting preference and not following it won't negatively affect the quality of your code. If alphabetizing props declarations isn't a part of your coding standards, then you can leave this rule off.