Overview - Router

router

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a0323f22 lint
26 days ago by schiller-m...
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122be0fd perf: move local bindings check before babel.traverse in computeSharedBindings Skip the expensive babel.traverse for route files that have no local module-level bindings (aside from Route). Most route files only contain imports + the Route export, so this early bailout avoids the traversal in the common case.
26 days ago by schiller-m...
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65b1bb59 fast path
26 days ago by schiller-m...
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6659
4ddb7436 fix: shared virtual module for code-split routes When a route file has module-level bindings (variables, functions, classes) referenced by **both** split and non-split route properties, the bindings are duplicated — initialized independently in the reference file and in each virtual split file. This breaks singletons, causes double side effects, and wastes bundle size. ```tsx const collection = { name: 'todos', preload: async () => {} } export const Route = createFileRoute('/todos')({ loader: async () => { await collection.preload() }, // stays in reference component: () => <div>{collection.name}</div>, // split to virtual }) ``` In this example, `collection` is initialized in **both** the reference file (because `loader` references it) and the `?tsr-split=component` virtual file (because the component references it). Two separate instances exist at runtime. To solve this issue, this PR introduces a third virtual module `route.tsx?tsr-shared=1` that contains shared bindings. Both the reference and virtual files import from it. When `sharedBindings` is empty (the common case — component-only helpers, loader-only code), no shared module exists and the system works exactly as today. The reference transform runs first and will emit a static import of `?tsr-shared=1` **only when needed**. Since split chunks are only discovered via the reference file's emitted `import('...?tsr-split=...')`, the bundler will always process/evaluate the reference module first. Result: the shared module is evaluated once and then reused by any later-loaded split chunk.
26 days ago by schiller-m...