1
3 
fn main() {
2 
    // Check if the target is WebAssembly
3
3 
    let target = std::env::var("TARGET").unwrap_or_default();
4 

            

        

            

                5
            

            

                3
            

            

                
    if target.contains("wasm32") {

            

        

            

                6
            

            

                
            

            

                
        println!("cargo:rustc-cfg=wasm");

            

        

            

                7
            

            

                3
            

            

                
    }

            

        

            

                8
            

            

                3
            

            

                
}