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Deduplication of warn when selected is set on <option> #11821

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merged 5 commits into from
Dec 10, 2017
Merged

Deduplication of warn when selected is set on <option> #11821

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be5b2c7
Deduplication of warn selected on option
watadarkstar Dec 9, 2017
0f1ad41
Ran yarn preitter
watadarkstar Dec 9, 2017
c5137d5
Fixed PR request
watadarkstar Dec 9, 2017
e3b5a2b
Actually check for deduplication
watadarkstar Dec 9, 2017
4ebcbfe
Minor nits
gaearon Dec 9, 2017
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29 changes: 29 additions & 0 deletions packages/react-dom/src/__tests__/ReactDOMSelect-test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -540,6 +540,7 @@ describe('ReactDOMSelect', () => {
</select>,
);
if (__DEV__) {
expect(console.error.calls.count()).toBe(1);
expect(console.error.calls.argsFor(0)[0]).toContain(
'`value` prop on `select` should not be null. ' +
'Consider using an empty string to clear the component or `undefined` ' +
Expand All @@ -557,6 +558,34 @@ describe('ReactDOMSelect', () => {
}
});

it('should warn if selected is set on <option>', () => {
spyOnDev(console, 'error');

ReactTestUtils.renderIntoDocument(
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<select>
<option selected={true} />
<option selected={true} />
</select>,
);
if (__DEV__) {
expect(console.error.calls.count()).toBe(1);
}

ReactTestUtils.renderIntoDocument(
<select>
<option selected={true} />
<option selected={true} />
</select>,
);
if (__DEV__) {
expect(console.error.calls.count()).toBe(1);
expect(console.error.calls.argsFor(0)[0]).toContain(
'Use the `defaultValue` or `value` props on <select> instead of ' +
'setting `selected` on <option>.',
);
}
});

it('should warn if value is null and multiple is true', () => {
spyOnDev(console, 'error');
ReactTestUtils.renderIntoDocument(
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15 changes: 10 additions & 5 deletions packages/react-dom/src/client/ReactDOMFiberOption.js
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,8 @@
import React from 'react';
import warning from 'fbjs/lib/warning';

let didWarnSelectedSetOnOption = false;

function flattenChildren(children) {
let content = '';

Expand All @@ -36,11 +38,14 @@ function flattenChildren(children) {
export function validateProps(element: Element, props: Object) {
// TODO (yungsters): Remove support for `selected` in <option>.
if (__DEV__) {
warning(
props.selected == null,
'Use the `defaultValue` or `value` props on <select> instead of ' +
'setting `selected` on <option>.',
);
if (!didWarnSelectedSetOnOption) {
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Actually I think this is wrong. This means we only check once, not warn once.

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Fixed in abe0faf.

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Woah good catch!

warning(
props.selected == null,
'Use the `defaultValue` or `value` props on <select> instead of ' +
'setting `selected` on <option>.',
);
didWarnSelectedSetOnOption = true;
}
}
}

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