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bug fix on input radio #11227

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merged 9 commits into from Nov 19, 2017
+124 −8
Merged

bug fix on input radio #11227

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4ce1fb0
fixed a bug on radio input
Oct 14, 2017
0e15659
Merge branch 'master' of https://github.com/facebook/react
Oct 22, 2017
6f3a000
roll back previous commit
Oct 27, 2017
aad2f64
moved comment
Oct 27, 2017
03b1b30
merge from upstream/master
Nov 2, 2017
69cbb05
Merge branch 'master' of https://github.com/facebook/react
Nov 7, 2017
25c0fc4
added a fixture for radio bug
Nov 7, 2017
e03b117
fixed prettier error
Nov 7, 2017
9ee15eb
read type from props, not node
Nov 13, 2017
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39 changes: 39 additions & 0 deletions packages/react-dom/src/__tests__/ReactDOMInput-test.js
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Expand Up @@ -669,6 +669,45 @@ describe('ReactDOMInput', () => {
expect(cNode.checked).toBe(true);
});

it('should have correct checked value when radio names changed', () => {
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Do you mind rephrasing this to should check the correct radio when the selected name moves?

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OK. yours is better

class App extends React.Component {
state = {
updated: false,
};
onClick = () => {
this.setState({updated: true});
};
render() {
const {updated} = this.state;
const radioName = updated ? 'secondName' : 'firstName';
return (
<div>
<button type="button" onClick={this.onClick} />
<input
type="radio"
name={radioName}
onChange={emptyFunction}
checked={updated === true}
/>
<input
type="radio"
name={radioName}
onChange={emptyFunction}
checked={updated === false}
/>
</div>
);
}
}

var stub = ReactTestUtils.renderIntoDocument(<App />);
var buttonNode = ReactDOM.findDOMNode(stub).childNodes[0];
var firstRadioNode = ReactDOM.findDOMNode(stub).childNodes[1];
expect(firstRadioNode.checked).toBe(false);
ReactTestUtils.Simulate.click(buttonNode);
expect(firstRadioNode.checked).toBe(true);
});

it('should control radio buttons if the tree updates during render', () => {
var sharedParent = document.createElement('div');
var container1 = document.createElement('div');
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7 changes: 7 additions & 0 deletions packages/react-dom/src/client/ReactDOMFiberComponent.js
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Expand Up @@ -810,6 +810,13 @@ export function updateProperties(
lastRawProps: Object,
nextRawProps: Object,
): void {
// Update checked *before* name.
// In the middle of an update, it is possible to have multiple checked.
// When a checked radio tries to change name, browser makes another radio's checked false.
if (tag === 'input') {
ReactDOMFiberInput.updateChecked(domElement, nextRawProps, 'radio');
}
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I'm trying to figure out why this is necessary (but it is definitely effective).

updateNamedCousins in ReactDOMInput should take care of this, but it looks like it doesn't run in the test case you've provided.

@jquense updateNamedCousins gets called in restoreControlledState, but for what ever reason it only fires on the button, which I guess is clicked and responsible for the last trigger. The radio input never gets targeted by restoreControlledState.

It feels like there's something deeper here that we need to fix.

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I think updateNamedCousins is called only on the button because of this code ReactTestUtils.Simulate.click(buttonNode);
I checked that updateNamedCousins is not called when I run your fixture.


var wasCustomComponentTag = isCustomComponent(tag, lastRawProps);
var isCustomComponentTag = isCustomComponent(tag, nextRawProps);
// Apply the diff.
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27 changes: 19 additions & 8 deletions packages/react-dom/src/client/ReactDOMFiberInput.js
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Expand Up @@ -144,6 +144,24 @@ export function initWrapperState(element: Element, props: Object) {
};
}

export function updateChecked(
element: Element,
props: Object,
targetType: ?string,
) {
var node = ((element: any): InputWithWrapperState);
if (!targetType || targetType === node.type) {
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In updateNamedCousins, we check for radio buttons like:

function updateNamedCousins(rootNode, props) {
  var name = props.name;
  if (props.type === 'radio' && name != null) {
    // ...
  }
  // ...
}

Can you use that check here? That would allow us to remove the targetType argument and reading from the DOM.

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I added the code in updateProperties because updateWrapper also calls updateChecked

var checked = props.checked;
if (checked != null) {
DOMPropertyOperations.setValueForProperty(
node,
'checked',
checked || false,
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Kind of a bummer that we have to || false here. It can't hurt, but I wonder if this is necessary (just with a quick test via https://codepen.io/nhunzaker/pen/qVadLo).

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I also think it's unnecessary.

);
}
}
}

export function updateWrapper(element: Element, props: Object) {
var node = ((element: any): InputWithWrapperState);
if (__DEV__) {
Expand Down Expand Up @@ -183,14 +201,7 @@ export function updateWrapper(element: Element, props: Object) {
}
}

var checked = props.checked;
if (checked != null) {
DOMPropertyOperations.setValueForProperty(
node,
'checked',
checked || false,
);
}
updateChecked(element, props);

var value = props.value;
if (value != null) {
Expand Down