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33 lines
1.7 KiB
Markdown
33 lines
1.7 KiB
Markdown
# CLI Reference
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The `wasm-bindgen` tool has a number of options available to it to tweak the JS
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that is generated. By default the generated JS uses ES modules and is compatible
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with both Node and browsers (but will likely require a bundler for both use
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cases).
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Supported flags of the CLI tool can be learned via `wasm-bindgen --help`, but
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some notable options are:
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* `--nodejs`: this flag will tailor output for Node instead of browsers,
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allowing for native usage of `require` of the generated JS and internally
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using `require` instead of ES modules. When using this flag no further
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postprocessing (aka a bundler) should be necessary to work with the wasm.
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* `--browser`: this flag will tailor the output specifically for browsers,
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making it incompatible with Node. This will basically make the generated JS a
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tiny bit smaller as runtime checks for Node won't be necessary.
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* `--no-modules`: the default output of `wasm-bindgen` uses ES modules but this
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option indicates that ES modules should not be used and output should be
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tailored for a web browser. In this mode `window.wasm_bindgen` will be a
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function that takes a path to the wasm file to fetch and instantiate.
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Afterwards exported functions from the wasm are available through
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`window.wasm_bindgen.foo`. Note that the name `wasm_bindgen` can be configured
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with the `--no-modules-global FOO` flag.
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* `--no-typescript`: by default a `*.d.ts` file is generated for the generated
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JS file, but this flag will disable generating this TypeScript file.
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* `--debug`: generates a bit more JS and wasm in "debug mode" to help catch
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programmer errors, but this output isn't intended to be shipped to production
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