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Add warning for componentDidReceiveProps() #11479

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merged 2 commits into from
Nov 7, 2017
Merged

Add warning for componentDidReceiveProps() #11479

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58f9e30
Add warning for componentDidReceiveProps()
iamtommcc Nov 7, 2017
9789cfb
Adjust message for componentDidReceiveProps() warning
iamtommcc Nov 7, 2017
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23 changes: 23 additions & 0 deletions packages/react-dom/src/__tests__/ReactCompositeComponent-test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -533,6 +533,29 @@ describe('ReactCompositeComponent', () => {
);
});

it('should warn when componentDidReceiveProps method is defined', () => {
spyOn(console, 'error');

class Component extends React.Component {
componentDidReceiveProps = () => {};

render() {
return <div />;
}
}

ReactTestUtils.renderIntoDocument(<Component />);

expectDev(console.error.calls.count()).toBe(1);
expectDev(console.error.calls.argsFor(0)[0]).toBe(
'Warning: Component has a method called ' +
'componentDidReceiveProps(). But there is no such lifecycle method. ' +
'If you meant to update the state in response to changing props, ' +
'use componentWillReceiveProps(). If you meant to fetch data or ' +
'run side-effects or mutations after React has updated the UI, use componentDidUpdate().',
);
});

it('should warn when defaultProps was defined as an instance property', () => {
spyOn(console, 'error');

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11 changes: 11 additions & 0 deletions packages/react-reconciler/src/ReactFiberClassComponent.js
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Original file line number Diff line number Diff line change
Expand Up @@ -281,6 +281,17 @@ export default function(
'Did you mean componentWillUnmount()?',
name,
);
const noComponentDidReceiveProps =
typeof instance.componentDidReceiveProps !== 'function';
warning(
noComponentDidReceiveProps,
'%s has a method called ' +
'componentDidReceiveProps(). But there is no such lifecycle method. ' +
'If you meant to update the state in response to changing props, ' +
'use componentWillReceiveProps(). If you meant to fetch data or ' +
'run side-effects or mutations after React has updated the UI, use componentDidUpdate().',
name,
);
const noComponentWillRecieveProps =
typeof instance.componentWillRecieveProps !== 'function';
warning(
Expand Down