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[eslint-plugin-react-hooks]: handling empty element in array #19145

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merged 1 commit into from
Jun 17, 2020
Merged

[eslint-plugin-react-hooks]: handling empty element in array #19145

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14 changes: 14 additions & 0 deletions packages/eslint-plugin-react-hooks/__tests__/ESLintRuleExhaustiveDeps-test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -369,6 +369,20 @@ const tests = {
}
`,
},
{
code: normalizeIndent`
function MyComponent({myEffect}) {
useEffect(myEffect, [,myEffect]);
}
`,
},
{
code: normalizeIndent`
function MyComponent({myEffect}) {
useEffect(myEffect, [,myEffect,,]);
}
`,
},
{
code: normalizeIndent`
let local = {};
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2 changes: 1 addition & 1 deletion packages/eslint-plugin-react-hooks/src/ExhaustiveDeps.js
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Original file line number Diff line number Diff line change
Expand Up @@ -145,7 +145,7 @@ export default {
if (
declaredDependenciesNode.elements &&
declaredDependenciesNode.elements.some(
el => el.type === 'Identifier' && el.name === callback.name,
el => el && el.type === 'Identifier' && el.name === callback.name,
)
) {
// If it's already in the list of deps, we don't care because
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