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Wasm Detection

pkg/dart2wasm/docs/wasm_detection.md

3.13.0-104.0.dev251 B
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Detecting whether code is running as WebAssembly

dart2wasm defines dart.tool.dart2wasm as true, meaning that bool.fromEnvironment('dart.tool.dart2wasm') can be used in a constant context to determine whether it was compiled to WebAssembly.