glsl-token-properties is a small Node.js utility for GLSL code analysis. It takes the token array produced by **glsl-tokenizer** and annotates each token with a `property` flag that indicates whether the token is being accessed as a member of another identifier (e.g., the `value` in `some.value`). The library is aimed at developers building tools—such as linters, parsers, or editors—that need to understand the structure of GLSL source code.