refactor: 🎨 no need to resolve empty url in css (#1732)

* refactor: 🎨 no need to resolve empty url in css

* refactor: 🎨 add test case

crates/mako/src/resolve.rs

@@ -280,7 +280,7 @@ fn do_resolve(
                 }
                 _ => {
                     eprintln!(
-                        "failed to resolve {} from {} with resolver err: {:?}",
+                        "failed to resolve `{}` from `{}` with resolver err: {:?}",
                         source,
                         path.to_string_lossy(),
                         oxc_resolve_err

crates/mako/src/visitors/css_assets.rs

@@ -28,10 +28,12 @@ impl VisitMut for CSSAssets {
             box UrlValue::Raw(s) => s.value.to_string(),
         };
 
-        if is_remote_or_data_or_hash(&url) {
+        if is_remote_or_data_or_hash(&url) || url.is_empty() {
             return;
         }
+
         let url = remove_first_tilde(url);
+
         let dep = Dependency {
             source: url,
             resolve_as: None,
@@ -110,6 +112,14 @@ mod tests {
         );
     }
 
+    #[test]
+    fn test_empty_url() {
+        assert_eq!(
+            run(r#".foo { background: url("") }"#),
+            r#".foo{background:url("")}"#
+        );
+    }
+
     #[test]
     fn test_big_image() {
         assert!(run(r#".foo { background: url(big.jpg) }"#).contains(".foo{background:url(big."));