Adding Wasm support after moving to Cow.

Cargo.toml

@@ -36,6 +36,7 @@ serde_yaml = "0.9"
 console_error_panic_hook = { version = "0.1.6", optional = true }
 gloo-utils = { version = "0.2", features = ["serde"] }
 wasm-bindgen = "0.2"
+js-sys = "0.3"
 wee_alloc = { version = "0.4.5", optional = true }
 
 [target.'cfg(target_arch = "wasm32")'.dev-dependencies]

cli/src/main.rs

@@ -25,7 +25,7 @@ fn main() {
                 .long("output-format")
                 .help("The output format")
                 .value_name("format")
-                .possible_values(&["yaml", "json"])
+                .possible_values(["yaml", "json"])
                 .default_value("yaml"),
         )
         .arg(

src/lib.rs

@@ -62,8 +62,15 @@ static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
 #[cfg(target_arch = "wasm32")]
 #[wasm_bindgen]
 pub fn transpile(collection: JsValue) -> std::result::Result<JsValue, JsValue> {
+    let s = if collection.is_undefined() {
+        String::from("null")
+    } else {
+        js_sys::JSON::stringify(&collection)
+            .map(String::from)
+            .unwrap_throw()
+    };
     let postman_spec: std::result::Result<postman::Spec, serde_json::Error> =
-        collection.into_serde();
+        serde_json::from_str(&s);
     match postman_spec {
         Ok(s) => {
             let oas_spec = Transpiler::transpile(s);