TokenCap is described as building a component map from JSX usage sites and comparing the props a component declares with the attributes its parent supplies. Its article also says it can analyze JSX/TSX and several single-file component formats without requiring a webpack or Vite build step. Those are claims made by the TokenCap article; no implementation or independent validation is established here.
What TokenCap says it extracts
TokenCap’s article describes two related outputs: a hierarchy of components that render other components, and a view of prop flow between those parents and children. A hierarchy answers “what renders this component?” Props flow answers “what does the parent pass, and what does the child declare it accepts?”
The article’s example shows DashboardHeader rendered by AppLayout and AdminShell, with children including UserAvatar and SearchBar. Its summary pairs declared props with attributes passed by parent components. This is an illustrative output excerpt, not a reported test or benchmark. TokenCap article
How the component hierarchy is built
The article says TokenCap builds its graph from JSX usage nodes rather than inferring relationships from file paths. That distinction is useful: a file tree reveals where source code is stored, while a render or usage site can show one component creating another, even when they live in separate files. The resulting hierarchy is intended to represent those render relationships, not merely directory structure. TokenCap article
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The article names a tree-sitter AST as the basis for the map. It does not provide enough implementation detail to establish how the analyzer resolves dynamic component references, aliases, or other indirect relationships.
How declared props are compared with parent-supplied attributes
TokenCap is described as tracking props declared in a component’s signature and comparing them with attributes supplied at JSX usage sites. This lets a reader inspect both sides of a relationship: what a child appears to accept and what a particular parent passes to it. The article does not establish how the analyzer handles spread attributes, conditional branches, context-provided values, or type inference, so its prop-flow description should not be taken as proof that every such case is resolved.
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Flow’s component syntax documentation gives a concrete example of the underlying relationship: names declared as component parameters correspond to prop names supplied in JSX. Flow’s React.PropsOf reference describes the object needed to instantiate a component and notes that props with defaults are treated as optional. These explain the general declaration-versus-use comparison; they do not show that TokenCap uses Flow or type-checker data. Flow component syntax · Flow React types
What JSX and SFC support means
The TokenCap article claims support for React JSX/TSX and Vue, Svelte, and Angular single-file components (SFCs), and says a webpack or Vite build is not required. No supported-version matrix or independent test results are provided, so this stated coverage does not establish compatibility with every framework version or syntax variant. TokenCap article
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For Vue specifically, an SFC is a .vue file organized around component-related blocks. Vue’s documentation describes <script setup> as compile-time syntax for the Composition API in an SFC; the SFC specification covers template, script, style, and optional custom blocks. These documents clarify what Vue SFCs are, but they do not independently verify TokenCap’s Vue parser or its handling of every block combination. Vue Single-File Components · Vue <script setup> · Vue SFC specification
What the available description does—and does not—establish
- Described capability: a usage-based component graph and a comparison of declared props with parent-passed attributes, according to the TokenCap article.
- Illustration, not validation: the
DashboardHeaderexample shows the kind of summary the article describes, but no benchmark, accuracy figure, or validation method is supplied. - Unverified implementation details: the tree-sitter basis, framework coverage, and no-webpack-or-Vite-build claim are attributed to the article; a repository, maintained technical documentation, and supported-version matrix were not established.
- Unspecified edge cases: handling of spreads, conditions, aliases, dynamic references, and context is not documented in the available description.
The article also shows the command tokencap make --profile balanced. Treat it as an example printed in that article, not as a verified current command or guarantee of a particular analysis result. TokenCap article
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