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fix textarea value of number 0 #274

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Merged
merged 1 commit into from
Sep 11, 2013
Merged

fix textarea value of number 0 #274

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13 changes: 8 additions & 5 deletions src/dom/components/ReactDOMInput.js
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Original file line number Diff line number Diff line change
Expand Up @@ -50,9 +50,10 @@ var instancesByReactID = {};
var ReactDOMInput = ReactCompositeComponent.createClass({

getInitialState: function() {
var defaultValue = this.props.defaultValue;
return {
checked: this.props.defaultChecked || false,
value: this.props.defaultValue != null ? this.props.defaultValue : ''
value: defaultValue != null && defaultValue !== false ? defaultValue : ''
};
},

Expand All @@ -69,9 +70,11 @@ var ReactDOMInput = ReactCompositeComponent.createClass({
props.defaultValue = null;
props.checked =
this.props.checked != null ? this.props.checked : this.state.checked;
// Cast `this.props.value` to a string so equality checks pass.
props.value =
this.props.value != null ? '' + this.props.value : this.state.value;

props.value = this.props.value != null && this.props.value !== false
? '' + this.props.value
: this.state.value;

props.onChange = this._handleChange;

return input(props, this.props.children);
Expand Down Expand Up @@ -102,7 +105,7 @@ var ReactDOMInput = ReactCompositeComponent.createClass({
DOMPropertyOperations.setValueForProperty(
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Obviously the old code here differs from textarea already, but perhaps this was intentional so that false becomes ''; generally in React you can write flag && <Component /> where nothing is inserted if flag is false so here perhaps we want to support <input value={flag && val} /> here too.

rootNode,
'value',
'' + this.props.value || ''
this.props.value !== false ? '' + this.props.value : ''
);
}
},
Expand Down
2 changes: 1 addition & 1 deletion src/dom/components/ReactDOMTextarea.js
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Original file line number Diff line number Diff line change
Expand Up @@ -117,7 +117,7 @@ var ReactDOMTextarea = ReactCompositeComponent.createClass({
DOMPropertyOperations.setValueForProperty(
rootNode,
'value',
this.props.value || ''
this.props.value !== false ? '' + this.props.value : ''
);
}
},
Expand Down
23 changes: 23 additions & 0 deletions src/dom/components/__tests__/ReactDOMInput-test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -45,13 +45,36 @@ describe('ReactDOMInput', function() {
expect(node.value).toBe('0');
});

it('should display "" for `defaultValue` of `false`', function() {
var stub = <input type="text" defaultValue={false} />;
var node = renderTextInput(stub);

expect(node.value).toBe('');
});

it('should display `value` of number 0', function() {
var stub = <input type="text" value={0} />;
var node = renderTextInput(stub);

expect(node.value).toBe('0');
});

it('should display "" for `value` of `false`', function() {
var stub = <input type="text" value={false} />;
var node = renderTextInput(stub);

expect(node.value).toBe('');
});

it('should properly control a value of number `0`', function() {
var stub = <input type="text" value={0} />;
var node = renderTextInput(stub);

node.value = 'giraffe';
ReactTestUtils.Simulate.input(node);
expect(node.value).toBe('0');
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Curious why the node.value = 'giraffe' is ignored here.

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It's a controlled component with no onChange handler… (note I'm changing the actual value, not the value prop).

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So ReactTestUtils.Simulate.input(node) should cause node.value to be reset? Do you happen to know where that happens?

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https://github.com/facebook/react/blob/master/src/dom/components/ReactDOMInput.js#L81

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Yeah, the input event triggers the onChange handler in ReactDOMInput which sets value on state to the current node value giraffe, causing a rerender after which componentDidUpdate sets node.value to match props.value. Something not working for you?

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I'm trying to upgrade the jsdom module that we use for our internal test environment. It's a big jump (v0.2.15 to v0.8.6), so no surprise there are problems, but one of them happens to be that node.value remains "giraffe" after this input event. I'll investigate some more. Thanks for confirming this is the expected behavior.

});

it('should control radio buttons', function() {
var RadioGroup = React.createClass({
render: function() {
Expand Down
23 changes: 23 additions & 0 deletions src/dom/components/__tests__/ReactDOMTextarea-test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -58,6 +58,13 @@ describe('ReactDOMTextarea', function() {
expect(node.value).toBe('0');
});

it('should display "" for `defaultValue` of `false`', function() {
var stub = <textarea type="text" defaultValue={false} />;
var node = renderTextarea(stub);

expect(node.value).toBe('');
});

it('should allow setting `value`', function() {
var stub = <textarea value="giraffe" />;
var node = renderTextarea(stub);
Expand All @@ -75,6 +82,22 @@ describe('ReactDOMTextarea', function() {
expect(node.value).toBe('0');
});

it('should display "" for `value` of `false`', function() {
var stub = <textarea type="text" value={false} />;
var node = renderTextarea(stub);

expect(node.value).toBe('');
});

it('should properly control a value of number `0`', function() {
var stub = <textarea value={0} />;
var node = renderTextarea(stub);

node.value = 'giraffe';
ReactTestUtils.Simulate.input(node);
expect(node.value).toBe('0');
});

it('should treat children like `defaultValue`', function() {
spyOn(console, 'warn');

Expand Down