improve: use a struct variant to clarify the error argument

kits/javascript/src/bindings.rs

@@ -107,9 +107,13 @@ pub fn load_bindings_into_global(
                         }
                     }
                 })
-                .map_err(|_| RuntimeError::InvalidBinding("send_http_request".to_string()))?,
+                .map_err(|_| RuntimeError::InvalidBinding {
+                    invalid_export: "send_http_request".to_string(),
+                })?,
         )
-        .map_err(|_| RuntimeError::InvalidBinding("send_http_request".to_string()))?;
+        .map_err(|_| RuntimeError::InvalidBinding {
+            invalid_export: "send_http_request".to_string(),
+        })?;
 
     global
         .set_property(
@@ -122,9 +126,13 @@ pub fn load_bindings_into_global(
 
                     Ok(JSValue::Null)
                 })
-                .map_err(|_| RuntimeError::InvalidBinding("console_log".to_string()))?,
+                .map_err(|_| RuntimeError::InvalidBinding {
+                    invalid_export: "console_log".to_string(),
+                })?,
         )
-        .map_err(|_| RuntimeError::InvalidBinding("console_log".to_string()))?;
+        .map_err(|_| RuntimeError::InvalidBinding {
+            invalid_export: "console_log".to_string(),
+        })?;
 
     Ok(())
 }

kits/javascript/src/error.rs

@@ -3,5 +3,5 @@
 
 /// List of runtime errors
 pub enum RuntimeError {
-    InvalidBinding(String),
+    InvalidBinding { invalid_export: String },
 }

kits/javascript/src/main.rs

@@ -43,8 +43,8 @@ fn main() {
         Ok(_) => {}
         Err(e) => match e {
             // In the future we may have more errors.
-            error::RuntimeError::InvalidBinding(name) => {
-                eprintln!("There was an error adding the '{name}' binding");
+            error::RuntimeError::InvalidBinding { invalid_export } => {
+                eprintln!("There was an error adding the '{invalid_export}' binding");
             }
         },
     }