[Node.js] Improve invalid arugment type error messages (fixes #101)

CHANGELOG.md

@@ -5,6 +5,7 @@
 - Use FxHasher for internal hash-based data structures.
 - Bump [css-minify](https://github.com/Mnwa/css-minify) to 0.3.1.
 - [WASM] Add `type` and `main` fields to package.json.
+- [Node.js] Improve invalid argument type error messages.
 
 ## 0.10.3
 

nodejs/src/lib.rs

@@ -2,8 +2,12 @@ use neon::prelude::*;
 use neon::types::buffer::TypedArray;
 
 fn minify(mut cx: FunctionContext) -> JsResult<JsBuffer> {
-    let src = cx.argument::<JsBuffer>(0)?;
-    let opt = cx.argument::<JsObject>(1)?;
+    let Ok(src) = cx.argument::<JsBuffer>(0) else {
+      return cx.throw_type_error("the first argument is not a Buffer");
+    };
+    let Ok(opt) = cx.argument::<JsObject>(1) else {
+      return cx.throw_type_error("the second argument is not an object");
+    };
     let cfg = minify_html::Cfg {
         do_not_minify_doctype: opt
             .get_opt::<JsBoolean, _, _>(&mut cx, "do_not_minify_doctype")?