Tune JS compression

Author: wilsonzlin

README.md

@@ -180,7 +180,7 @@ All [`Cfg` fields](https://docs.rs/minify-html/latest/minify_html/struct.Cfg.htm
 
 - Package: [minify-html](https://pypi.org/project/minify-html)
 - Binding: [PyO3](https://github.com/PyO3/pyo3)
-- Platforms: Linux (ARM64 and x64), macOS (ARM64 and x64), Windows (x64); Python 3.8 to 3.13
+- Platforms: Linux (ARM64 and x64), macOS (ARM64 and x64), Windows (x64); Python 3.8 to 3.14
 
 ### Get
 

minify-html-common/src/tests/mod.rs

@@ -457,7 +457,7 @@ pub fn create_common_js_test_data() -> HashMap<&'static [u8], &'static [u8]> {
             let a = 1;
         </script>
     "#,
-    b"<script>let a=1;</script>",
+    b"<script>// This is a comment.\nlet a=1;</script>",
   );
 
   // js minification unintentional closing tag

minify-html-onepass/src/unit/script.rs

@@ -63,9 +63,10 @@ pub fn process_script(
         let mut program = parser_ret.program;
 
         // Apply minification
+        // Use CompressOptions::safest() instead of default() to avoid overly aggressive dead code elimination
         let minifier_options = MinifierOptions {
           mangle: Some(MangleOptions::default()),
-          compress: Some(CompressOptions::default()),
+          compress: Some(CompressOptions::safest()),
         };
         let _minifier_ret = Minifier::new(minifier_options).minify(&allocator, &mut program);
 

minify-html/src/minify/js.rs

@@ -37,13 +37,13 @@ pub fn minify_js(cfg: &Cfg, mode: TopLevelMode, out: &mut Vec<u8>, code: &[u8])
       // Only proceed if parsing succeeded without errors
       if parser_ret.errors.is_empty() {
         let mut program = parser_ret.program;
-
+        
         // Apply minification
-        let minifier_options = MinifierOptions {
+        // Use CompressOptions::safest() instead of default() to avoid overly aggressive dead code elimination
+        let _minifier_ret = Minifier::new(MinifierOptions {
           mangle: Some(MangleOptions::default()),
-          compress: Some(CompressOptions::default()),
-        };
-        let _minifier_ret = Minifier::new(minifier_options).minify(&allocator, &mut program);
+          compress: Some(CompressOptions::safest()),
+        }).minify(&allocator, &mut program);
 
         // Generate minified code
         let codegen_options = CodegenOptions {