feat(napi/minify): expose drop_labels option (#14635)

Exposed the `drop_labels` option from JS API.

Author: sapphi-red

Cargo.lock

@@ -34,7 +34,6 @@ oxc_span = { workspace = true }
 
 napi = { workspace = true }
 napi-derive = { workspace = true }
-rustc-hash = { workspace = true }
 
 [target.'cfg(not(any(target_os = "linux", target_os = "freebsd", target_arch = "arm", target_family = "wasm")))'.dependencies]
 mimalloc-safe = { workspace = true, optional = true, features = ["skip_collect_on_exit"] }

napi/minify/Cargo.toml

@@ -60,6 +60,14 @@ export interface CompressOptions {
    * @default true
    */
   sequences?: boolean
+  /**
+   * Set of label names to drop from the code.
+   *
+   * Labeled statements matching these names will be removed during minification.
+   *
+   * @default []
+   */
+  dropLabels?: Array<string>
   /** Limit the maximum number of iterations for debugging purpose. */
   maxIterations?: number
 }

napi/minify/index.d.ts

@@ -3,7 +3,6 @@ use napi_derive::napi;
 
 use oxc_compat::EngineTargets;
 use oxc_minifier::TreeShakeOptions;
-use rustc_hash::FxHashSet;
 
 #[napi(object)]
 pub struct CompressOptions {
@@ -53,6 +52,13 @@ pub struct CompressOptions {
     /// @default true
     pub sequences: Option<bool>,
 
+    /// Set of label names to drop from the code.
+    ///
+    /// Labeled statements matching these names will be removed during minification.
+    ///
+    /// @default []
+    pub drop_labels: Option<Vec<String>>,
+
     /// Limit the maximum number of iterations for debugging purpose.
     pub max_iterations: Option<u8>,
 }
@@ -82,7 +88,11 @@ impl TryFrom<&CompressOptions> for oxc_minifier::CompressOptions {
             },
             keep_names: o.keep_names.as_ref().map(Into::into).unwrap_or_default(),
             treeshake: TreeShakeOptions::default(),
-            drop_labels: FxHashSet::default(),
+            drop_labels: o
+                .drop_labels
+                .as_ref()
+                .map(|labels| labels.iter().cloned().collect())
+                .unwrap_or_default(),
             max_iterations: o.max_iterations,
         })
     }

napi/minify/src/options.rs

@@ -43,6 +43,15 @@ describe('simple', () => {
     expect(ret.code).toBe('');
     expect(ret.errors.length).toBe(1);
   });
+
+  it('supports drop_labels option', () => {
+    const code = 'PURE: { foo(); bar(); } OTHER: { baz(); }';
+    const ret = minify('test.js', code, {
+      compress: { dropLabels: ['PURE'] },
+    });
+    expect(ret.code).toBe('OTHER:baz();');
+    expect(ret.errors.length).toBe(0);
+  });
 });
 
 describe('worker', () => {