{"record":{"id":"6e15acda473d9731","repo":"withastro/astro","slug":"unable-to-render-result-pathname-because-it-con","errorCode":null,"errorMessage":"Unable to render ${result.pathname} because it contains an undefined Component!\nDid you forget to import the component or is it possible there is a typo?","messagePattern":"Unable to render (.+?) because it contains an undefined Component!\nDid you forget to import the component or is it possible there is a typo\\?","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/astro/src/runtime/server/jsx.ts","lineNumber":69,"sourceCode":"\t\t\t\t\tcontent += item;\n\t\t\t\t}\n\t\t\t}\n\t\t\tif (instructions) {\n\t\t\t\treturn markHTMLString(new SlotString(content, instructions));\n\t\t\t}\n\t\t\treturn markHTMLString(content);\n\t\t}\n\t}\n\n\treturn renderJSXVNode(result, vnode);\n}\n\nasync function renderJSXVNode(result: SSRResult, vnode: AstroVNode): Promise<any> {\n\tif (isVNode(vnode)) {\n\t\t// eslint-disable-next-line @typescript-eslint/switch-exhaustiveness-check\n\t\tswitch (true) {\n\t\t\tcase !vnode.type: {\n\t\t\t\tthrow new Error(`Unable to render ${result.pathname} because it contains an undefined Component!\nDid you forget to import the component or is it possible there is a typo?`);\n\t\t\t}\n\t\t\tcase (vnode.type as any) === Symbol.for('astro:fragment'):\n\t\t\t\treturn renderJSX(result, vnode.props.children);\n\t\t\tcase isAstroComponentFactory(vnode.type): {\n\t\t\t\tlet props: Record<string, any> = {};\n\t\t\t\tlet slots: Record<string, any> = {};\n\t\t\t\tfor (const [key, value] of Object.entries(vnode.props ?? {})) {\n\t\t\t\t\tif (key === 'children' || (value && typeof value === 'object' && value['$$slot'])) {\n\t\t\t\t\t\tslots[key === 'children' ? 'default' : key] = () => renderJSX(result, value);\n\t\t\t\t\t} else {\n\t\t\t\t\t\tprops[key] = value;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t// We don't use renderToString because it doesn't contain the server island script handling\n\t\t\t\tconst str = await renderComponentToString(\n\t\t\t\t\tresult,\n\t\t\t\t\tvnode.type.name,","sourceCodeStart":51,"sourceCodeEnd":87,"githubUrl":"https://github.com/withastro/astro/blob/e294953aa8aadd98d5be92e60a03037b05dbdfd4/packages/astro/src/runtime/server/jsx.ts#L51-L87","documentation":"Inside the JSX rendering runtime, renderJSXVNode throws when a vnode's type is falsy (undefined or null). That means JSX was created with a component reference that is undefined: the element exists, but there is nothing to render. The message points at the two usual causes: a missing import or a typo in the component name.","triggerScenarios":"A named import that does not exist in the source module (import { Buton } from './Button.jsx' when the export is Button); const Component = registry[name] with a missing key; a conditional import that yields undefined; circular imports leaving one binding undefined at render time.","commonSituations":"Typo'd import names; renamed exports after a library upgrade; component maps (icon registries, MDX component overrides) with missing entries; barrel files that forgot to re-export the component.","solutions":["Check the import name against the component file's actual export (default vs named)","If the component comes from a registry/map, guard the lookup and provide a fallback component","Fix or extend barrel re-exports so the referenced name exists","Break import cycles by moving shared code into a third module"],"exampleFix":"// before\nimport { Buton } from './Button.jsx';\n<Buton>Hi</Buton>\n\n// after\nimport { Button } from './Button.jsx';\n<Button>Hi</Button>","handlingStrategy":"type-guard","validationCode":"import * as Icon from './icons.jsx';\nconst C = Icon[name];\nif (!C) throw new Error('Unknown component: ' + name);","typeGuard":"function isDefinedComponent(C: unknown): C is React.FC<any> | (() => any) {\n  return typeof C === 'function' || (typeof C === 'object' && C !== null);\n}","tryCatchPattern":null,"preventionTips":["Double-check named vs default imports for every component","Guard dynamic component maps with a fallback: const C = registry[name] ?? Placeholder;","Enable strict TypeScript so undefined imports surface at compile time"],"tags":["astro","jsx","undefined-component","import","typo"],"backgroundTag":"undefined-component","analyzedSha":"e294953aa8aadd98d5be92e60a03037b05dbdfd4","analyzedAt":"2026-08-18T18:48:03.901Z","contentChangedAt":"2026-08-18T18:48:03.901Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}