feat(napi): expose module type info in ResolveResult (#223)

Author: Brooooooklyn

napi/index.d.ts

@@ -188,6 +188,8 @@ export interface NapiResolveOptions {
 export interface ResolveResult {
   path?: string
   error?: string
+  /** "type" field in the package.json file */
+  moduleType?: string
 }
 
 /**
@@ -199,7 +201,7 @@ export interface Restriction {
   regex?: string
 }
 
-export function sync(path: string, request: string): ResolveResult
+export declare function sync(path: string, request: string): ResolveResult
 
 /**
  * Tsconfig Options

napi/src/lib.rs

@@ -23,15 +23,22 @@ mod tracing;
 pub struct ResolveResult {
     pub path: Option<String>,
     pub error: Option<String>,
+    /// "type" field in the package.json file
+    pub module_type: Option<String>,
 }
 
 fn resolve(resolver: &Resolver, path: &Path, request: &str) -> ResolveResult {
     match resolver.resolve(path, request) {
         Ok(resolution) => ResolveResult {
             path: Some(resolution.full_path().to_string_lossy().to_string()),
             error: None,
+            module_type: resolution
+                .package_json()
+                .and_then(|p| p.r#type.as_ref())
+                .and_then(|t| t.as_str())
+                .map(|t| t.to_string()),
         },
-        Err(err) => ResolveResult { path: None, error: Some(err.to_string()) },
+        Err(err) => ResolveResult { path: None, module_type: None, error: Some(err.to_string()) },
     }
 }