perf(props): Remove propTypes from production build

perf(props): Remove propTypes from production build

Author: layershifter

.github/CONTRIBUTING.md

@@ -126,7 +126,7 @@ class Dropdown extends Component {
 
 ### Define _meta
 
-Every component has a static property called `_meta`.  This object defines the component.  The values here are used in `propTypes`, generated documentation, generated test cases, and some utilities.
+Every component has a static property called `_meta`. This object defines the component. The values here are used for handling props, generated documentation, generated test cases and some utilities.
 
 Here's an example `_meta` object:
 
@@ -136,9 +136,7 @@ import { META } from '../../lib'
 const _meta = {
   name: 'MyComponent',
   type: META.TYPES.MODULE,
-  props: {
-    pointing: ['bottom left', 'bottom right'],
-  },
+  props: ['as', 'children', 'className'],
 }
 ```
 
@@ -162,6 +160,27 @@ class MyComponent {
 }
 ```
 
+### Using propTypes
+
+Every component must have fully described `propTypes`, values for them are defined in `props`.
+ 
+ ```js
+ import React, { PropTypes } from 'react'
+ 
+ function MyComponent(props) {
+   return <div className={props.position}>{props.children}</div>
+ }
+ 
+ MyComponent.props = {
+   position: ['left', 'right'],
+ }
+ 
+ MyComponent.propTypes = {
+   children: PropTypes.node,
+   position: PropTypes.oneOf(MyComponent.props),
+ }
+ ```
+
 ### Conformance Test
 
 Review [common tests](#common-tests) below.  You should now add the [`isConformant()`](#isconformant-required) common test and get it to pass.  This will validate the `_meta` and help you get your component off the ground.

src/elements/Rail/Rail.js

@@ -47,43 +47,55 @@ function Rail(props) {
 Rail._meta = {
   name: 'Rail',
   type: META.TYPES.ELEMENT,
-  props: {
-    close: ['very'],
-    position: SUI.FLOATS,
-    size: _.without(SUI.SIZES, 'medium'),
-  },
+  props: [
+    'as', 'attached', 'children', 'className', 'close', 'dividing', 'internal', 'position', 'size',
+  ],
 }
 
-Rail.propTypes = {
-  /** An element type to render as (string or function). */
-  as: customPropTypes.as,
+if (process.env.NODE_ENV !== 'production') {
+  Rail.props = {
+    close: {
+      values: ['very'],
+    },
+    position: {
+      values: SUI.FLOATS,
+    },
+    size: {
+      values: _.without(SUI.SIZES, 'medium'),
+    },
+  }
 
-  /** A rail can appear attached to the main viewport. */
-  attached: PropTypes.bool,
+  Rail.propTypes = {
+    /** An element type to render as (string or function). */
+    as: customPropTypes.as,
 
-  /** Primary content. */
-  children: PropTypes.node,
+    /** A rail can appear attached to the main viewport. */
+    attached: PropTypes.bool,
 
-  /** Additional classes. */
-  className: PropTypes.string,
+    /** Primary content. */
+    children: PropTypes.node,
 
-  /** A rail can appear closer to the main viewport. */
-  close: PropTypes.oneOfType([
-    PropTypes.bool,
-    PropTypes.oneOf(Rail._meta.props.close),
-  ]),
+    /** Additional classes. */
+    className: PropTypes.string,
 
-  /** A rail can create a division between itself and a container. */
-  dividing: PropTypes.bool,
+    /** A rail can appear closer to the main viewport. */
+    close: PropTypes.oneOfType([
+      PropTypes.bool,
+      PropTypes.oneOf(Rail.props.close),
+    ]),
 
-  /** A rail can attach itself to the inside of a container. */
-  internal: PropTypes.bool,
+    /** A rail can create a division between itself and a container. */
+    dividing: PropTypes.bool,
 
-  /** A rail can be presented on the left or right side of a container. */
-  position: PropTypes.oneOf(Rail._meta.props.position).isRequired,
+    /** A rail can attach itself to the inside of a container. */
+    internal: PropTypes.bool,
 
-  /** A rail can have different sizes. */
-  size: PropTypes.oneOf(Rail._meta.props.size),
+    /** A rail can be presented on the left or right side of a container. */
+    position: PropTypes.oneOf(Rail.props.position).isRequired,
+
+    /** A rail can have different sizes. */
+    size: PropTypes.oneOf(Rail.props.size),
+  }
 }
 
 export default Rail

src/lib/getUnhandledProps.js

@@ -1,4 +1,5 @@
 import _ from 'lodash'
+
 /**
  * Returns an object consisting of props beyond the scope of the Component.
  * Useful for getting and spreading unknown props from the user.
@@ -7,11 +8,7 @@ import _ from 'lodash'
  * @returns {{}} A shallow copy of the prop object
  */
 const getUnhandledProps = (Component, props) => {
-  const handledProps = _.union(
-    Component.autoControlledProps,
-    _.keys(Component.defaultProps),
-    _.keys(Component.propTypes),
-  )
+  const handledProps = Component._meta ? Component._meta.props || [] : []
 
   return _.omit(props, handledProps)
 }

test/specs/commonTests.js

@@ -254,6 +254,27 @@ export const isConformant = (Component, options = {}) => {
     })
   })
 
+  describe('handles props', () => {
+    it('defines handled props in Component._meta.props', () => {
+      Component.should.have.any.keys('_meta')
+      Component._meta.should.have.any.keys('props')
+      Component._meta.props.should.be.an('array')
+    })
+
+    it('Component._meta.props includes all handled props', () => {
+      const computedProps = _.union(
+        Component.autoControlledProps,
+        _.keys(Component.defaultProps),
+        _.keys(Component.propTypes),
+      )
+
+      Component._meta.props.should.to.deep.equal(computedProps,
+        'It seems that not all props were defined in Component._meta.props, you need to check that they equal to ' +
+        'union of Component.autoControlledProps and keys of Component.defaultProps and Component.propTypes'
+      )
+    })
+  })
+
   // ----------------------------------------
   // Events
   // ----------------------------------------
@@ -466,11 +487,11 @@ export const rendersChildren = (Component, options = {}) => {
 // className from prop
 // ----------------------------------------
 const _definesPropOptions = (Component, propKey) => {
-  it(`defines ${propKey} options in Component._meta.props`, () => {
-    Component.should.have.any.keys('_meta')
-    Component._meta.should.have.any.keys('props')
-    Component._meta.props.should.have.any.keys(propKey)
-    Component._meta.props[propKey].should.be.an('array')
+  it(`defines ${propKey} options in Component.props`, () => {
+    Component.should.have.any.keys('props')
+    Component.props.should.have.any.keys(propKey)
+    Component.props[propKey].should.have.any.keys('values')
+    Component.props[propKey].values.should.be.an('array')
   })
 }
 

test/specs/lib/getUnhandledProps-test.js

@@ -1,5 +1,4 @@
-import React, { PropTypes } from 'react'
-
+import React from 'react'
 import { getUnhandledProps } from 'src/lib'
 
 // We spread the unhandled props onto the rendered result.
@@ -10,33 +9,21 @@ function TestComponent(props) {
 }
 
 beforeEach(() => {
-  delete TestComponent.propTypes
-  delete TestComponent.defaultProps
-  delete TestComponent.autoControlledProps
+  delete TestComponent._meta
 })
 
 describe('getUnhandledProps', () => {
-  it('removes props defined in propTypes', () => {
-    TestComponent.propTypes = { 'data-remove-me': PropTypes.string }
+  it('removes props defined in _meta.props', () => {
+    TestComponent._meta = { props: ['data-remove-me'] }
     shallow(<TestComponent />)
       .should.not.have.prop('data-remove-me', 'thanks')
   })
-  it('removes props defined in defaultProps', () => {
-    TestComponent.defaultProps = { 'data-remove-me': 'thanks' }
-    shallow(<TestComponent />)
-      .should.not.have.prop('data-remove-me', 'thanks')
-  })
-  it('removes props defined in autoControlledProps', () => {
-    TestComponent.autoControlledProps = ['data-remove-me']
-    shallow(<TestComponent />)
-      .should.not.have.prop('data-remove-me')
-  })
-  it('removes default versions of autoControlledProps', () => {
-    TestComponent.autoControlledProps = ['data-remove-me']
-    shallow(<TestComponent />)
-      .should.not.have.prop('defaultRemoveMe')
+  it('leaves props that are not defined _meta.props', () => {
+    TestComponent._meta = {}
+    shallow(<TestComponent data-leave-this='it is unhandled' />)
+      .should.have.prop('data-leave-this')
   })
-  it('leaves props that are not defined in propTypes', () => {
+  it('leaves props that are not defined _meta.props', () => {
     shallow(<TestComponent data-leave-this='it is unhandled' />)
       .should.have.prop('data-leave-this')
   })