no-useless-undefined: Ignore React state setters (#2223)

sindresorhus · Nov 28, 2023 · 42881ba · 42881ba
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commit 42881ba
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diff --git a/rules/no-useless-undefined.js b/rules/no-useless-undefined.js
@@ -60,6 +60,8 @@ const shouldIgnore = node => {
 
 		// `React.createContext(undefined)`
 		|| name === 'createContext'
+		// `setState(undefined)`
+		|| /^set[A-Z]/.test(name)
 
 		// https://vuejs.org/api/reactivity-core.html#ref
 		|| name === 'ref';

diff --git a/test/no-useless-undefined.mjs b/test/no-useless-undefined.mjs
@@ -53,6 +53,10 @@ test({
 		'array.unshift(undefined);',
 		'createContext(undefined);',
 		'React.createContext(undefined);',
+		'setState(undefined)',
+		'setState?.(undefined)',
+		'props.setState(undefined)',
+		'props.setState?.(undefined)',
 		'array.includes(undefined)',
 		'set.has(undefined)',