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/** * Enforce that React Router route `element` values are JSX, not component references. * * Example (good): * { path: "/x", element: } * * Example (bad): * { path: "/x", element: Page } */ export default { rules: { 'route-element-jsx': { meta: { type: 'problem', docs: { description: 'Require RouteObject.element to be JSX (e.g. ), not a component reference.', }, schema: [], messages: { mustBeJsx: '`element` must be JSX (e.g. `< />`). You likely meant to render the component, not pass it.', }, }, create(context) { const sourceCode = context.sourceCode function getKeyName(key) { if (!key) return null if (key.type === 'Identifier') return key.name if (key.type === 'Literal') return String(key.value) return null } function isJsxLike(node) { if (!node) return false switch (node.type) { case 'JSXElement': case 'JSXFragment': return true case 'Literal': // allow null for "no element" return node.value === null case 'ConditionalExpression': return isJsxLike(node.consequent) && isJsxLike(node.alternate) case 'LogicalExpression': // e.g. condition && return isJsxLike(node.right) case 'CallExpression': { // allow React.createElement(...) const callee = node.callee return ( callee?.type === 'MemberExpression' && callee.object?.type === 'Identifier' && callee.object.name === 'React' && callee.property?.type === 'Identifier' && callee.property.name === 'createElement' ) } default: return false } } function getSuggestedName(node) { if (!node) return 'Component' if (node.type === 'Identifier') return node.name if (node.type === 'MemberExpression') { return sourceCode.getText(node) } return 'Component' } return { Property(node) { const keyName = getKeyName(node.key) if (keyName !== 'element') return if (node.computed) return // Only report when it's clearly not JSX-like (to avoid false positives). if (isJsxLike(node.value)) return // Common "wrong" pattern: Identifier / MemberExpression / LazyExoticComponent variable, etc. const suggested = getSuggestedName(node.value) context.report({ node: node.value, messageId: 'mustBeJsx', data: { name: suggested }, }) }, } }, }, }, }

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