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https://github.com/fluencelabs/wasm-bindgen
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24 lines
737 B
Markdown
24 lines
737 B
Markdown
# Logging
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The `wasm_bindgen_webidl` crate (used by `web-sys`'s `build.rs`) uses
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[`env_logger`][env_logger] for logging, which can be enabled by setting the
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`RUST_LOG=wasm_bindgen_webidl` environment variable while building the `web-sys`
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crate.
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Make sure to enable "very verbose" output during `cargo build` to see these logs
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within `web-sys`'s build script output.
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```sh
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cd crates/web-sys
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RUST_LOG=wasm_bindgen_webidl cargo build -vv
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```
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If `wasm_bindgen_webidl` encounters WebIDL constructs that it doesn't know how
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to translate into `wasm-bindgen` AST items, it will emit warn-level logs.
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```
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WARN 2018-07-06T18:21:49Z: wasm_bindgen_webidl: Unsupported WebIDL interface: ...
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```
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[env_logger]: https://crates.io/crates/env_logger
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