Warn when value and defaultValue props are both specified on input or textarea.

src/renderers/dom/client/wrappers/ReactDOMInput.js

@@ -25,6 +25,8 @@ var instancesByReactID = {};
 var didWarnValueLink = false;
 var didWarnCheckedLink = false;
 var didWarnValueNull = false;
+var didWarnValueDefaultValue = false;
+var didWarnCheckedDefaultChecked = false;
 
 function forceUpdateIfMounted() {
  if (this._rootNodeID) {
@@ -104,6 +106,28 @@ var ReactDOMInput = {
  );
  didWarnCheckedLink = true;
  }
+ if (props.checked !== undefined && props.defaultChecked !== undefined &&
+ !didWarnCheckedDefaultChecked) {
+ warning(
+ false,
+ 'Input elements must be either controlled or uncontrolled (specify either the ' +
+ 'checked prop, or the defaultChecked prop, but not both). Decide between using a ' +
+ 'controlled or uncontrolled input and remove one of these props. More info: ' +
+ 'https://fb.me/react-controlled-components'
+ );
+ didWarnCheckedDefaultChecked = true;
+ }
+ if (props.value !== undefined && props.defaultValue !== undefined &&
+ !didWarnValueDefaultValue) {
+ warning(
+ false,
+ 'Input elements must be either controlled or uncontrolled (specify either the value ' +
+ 'prop, or the defaultValue prop, but not both). Decide between using a controlled ' +
+ 'or uncontrolled input and remove one of these props. More info: ' +
+ 'https://fb.me/react-controlled-components'
+ );
+ didWarnValueDefaultValue = true;
+ }
  warnIfValueIsNull(props);
  }
 

src/renderers/dom/client/wrappers/ReactDOMSelect.js

@@ -20,6 +20,7 @@ var warning = require('warning');
 
 var didWarnValueLink = false;
 var didWarnValueNull = false;
+var didWarnValueDefaultValue = false;
 
 function updateOptionsIfPendingUpdateAndMounted() {
  if (this._rootNodeID && this._wrapperState.pendingUpdate) {
@@ -178,6 +179,18 @@ var ReactDOMSelect = {
  onChange: _handleChange.bind(inst),
  wasMultiple: Boolean(props.multiple),
  };
+
+ if (props.value !== undefined && props.defaultValue !== undefined &&
+ !didWarnValueDefaultValue) {
+ warning(
+ false,
+ 'Select elements must be either controlled or uncontrolled (specify either the ' +
+ 'value prop, or the defaultValue prop, but not both). Decide between using a ' +
+ 'controlled or uncontrolled select element and remove one of these props. More info: ' +
+ 'https://fb.me/react-controlled-components'
+ );
+ didWarnValueDefaultValue = true;
+ }
  },
 
  getSelectValueContext: function(inst) {

src/renderers/dom/client/wrappers/ReactDOMTextarea.js

@@ -22,6 +22,7 @@ var warning = require('warning');
 
 var didWarnValueLink = false;
 var didWarnValueNull = false;
+var didWarnValDefaultVal = false;
 
 function forceUpdateIfMounted() {
  if (this._rootNodeID) {
@@ -91,6 +92,16 @@ var ReactDOMTextarea = {
  );
  didWarnValueLink = true;
  }
+ if (props.value !== undefined && props.defaultValue !== undefined && !didWarnValDefaultVal) {
+ warning(
+ false,
+ 'Textarea elements must be either controlled or uncontrolled (specify either the value ' +
+ 'prop, or the defaultValue prop, but not both). Decide between using a controlled or ' +
+ 'uncontrolled input and remove one of these props. More info: ' +
+ 'https://fb.me/react-controlled-components'
+ );
+ didWarnValDefaultVal = true;
+ }
  warnIfValueIsNull(props);
  }
 

src/renderers/dom/client/wrappers/__tests__/ReactDOMInput-test.js

@@ -415,6 +415,40 @@ describe('ReactDOMInput', function() {
  expect(console.error.argsForCall.length).toBe(1);
  });
 
+ it('should throw warning message if checked and defaultChecked props are specified', function() {
+ ReactTestUtils.renderIntoDocument(
+ <input type="radio" checked={true} defaultChecked={true} readOnly={true} />
+ );
+ expect(console.error.argsForCall[0][0]).toContain(
+ 'Input elements must be either controlled or uncontrolled (specify either the ' +
+ 'checked prop, or the defaultChecked prop, but not both). Decide between using a ' +
+ 'controlled or uncontrolled input and remove one of these props. More info: ' +
+ 'https://fb.me/react-controlled-components'
+ );
+
+ ReactTestUtils.renderIntoDocument(
+ <input type="radio" checked={true} defaultChecked={true} readOnly={true} />
+ );
+ expect(console.error.argsForCall.length).toBe(1);
+ });
+
+ it('should throw warning message if value and defaultValue props are specified', function() {
+ ReactTestUtils.renderIntoDocument(
+ <input type="text" value="foo" defaultValue="bar" readOnly={true} />
+ );
+ expect(console.error.argsForCall[0][0]).toContain(
+ 'Input elements must be either controlled or uncontrolled (specify either the value ' +
+ 'prop, or the defaultValue prop, but not both). Decide between using a controlled or ' +
+ 'uncontrolled input and remove one of these props. More info: ' +
+ 'https://fb.me/react-controlled-components'
+ );
+
+ ReactTestUtils.renderIntoDocument(
+ <input type="text" value="foo" defaultValue="bar" readOnly={true} />
+ );
+ expect(console.error.argsForCall.length).toBe(1);
+ });
+
  it('sets type before value always', function() {
  var log = [];
  var originalCreateElement = document.createElement;

src/renderers/dom/client/wrappers/__tests__/ReactDOMSelect-test.js

@@ -490,4 +490,30 @@ describe('ReactDOMSelect', function() {
 
  expect(node.value).toBe('giraffe');
  });
+
+ it('should throw warning message if value and defaultValue props are specified', function() {
+ spyOn(console, 'error');
+ ReactTestUtils.renderIntoDocument(
+ <select value="giraffe" defaultValue="giraffe" readOnly={true}>
+ <option value="monkey">A monkey!</option>
+ <option value="giraffe">A giraffe!</option>
+ <option value="gorilla">A gorilla!</option>
+ </select>
+ );
+ expect(console.error.argsForCall[0][0]).toContain(
+ 'Select elements must be either controlled or uncontrolled (specify either the ' +
+ 'value prop, or the defaultValue prop, but not both). Decide between using a ' +
+ 'controlled or uncontrolled select element and remove one of these props. More info: ' +
+ 'https://fb.me/react-controlled-components'
+ );
+
+ ReactTestUtils.renderIntoDocument(
+ <select value="giraffe" defaultValue="giraffe" readOnly={true}>
+ <option value="monkey">A monkey!</option>
+ <option value="giraffe">A giraffe!</option>
+ <option value="gorilla">A gorilla!</option>
+ </select>
+ );
+ expect(console.error.argsForCall.length).toBe(1);
+ });
 });

src/renderers/dom/client/wrappers/__tests__/ReactDOMTextarea-test.js

@@ -278,4 +278,22 @@ describe('ReactDOMTextarea', function() {
  ReactTestUtils.renderIntoDocument(<textarea value={null} />);
  expect(console.error.argsForCall.length).toBe(1);
  });
+
+ it('should throw warning message if value and defaultValue are specified', function() {
+ spyOn(console, 'error');
+ ReactTestUtils.renderIntoDocument(
+ <textarea value="foo" defaultValue="bar" readOnly={true} />
+ );
+ expect(console.error.argsForCall[0][0]).toContain(
+ 'Textarea elements must be either controlled or uncontrolled (specify either the value ' +
+ 'prop, or the defaultValue prop, but not both). Decide between using a controlled or ' +
+ 'uncontrolled input and remove one of these props. More info: ' +
+ 'https://fb.me/react-controlled-components'
+ );
+
+ ReactTestUtils.renderIntoDocument(
+ <textarea value="foo" defaultValue="bar" readOnly={true} />
+ );
+ expect(console.error.argsForCall.length).toBe(1);
+ });
 });