terser - npm Package Compare versions

Comparing version 5.29.2 to 5.30.0

CHANGELOG.md

 # Changelog
 
+## v5.20.0
+ - Improve removal of classes referring to themselves
+
 ## v5.29.2
@@ -4,0 +7,0 @@ - Make sure 'computed_props' creates string keys

lib/compress/drop-side-effect-free.js

@@ -158,5 +158,9 @@ /***********************************************************************
     const with_effects = [];
+
+    if (this.is_self_referential() && this.has_side_effects(compressor)) {
+        return this;
+    }
+
     const trimmed_extends = this.extends && this.extends.drop_side_effect_free(compressor);
-    if (trimmed_extends)
-        with_effects.push(trimmed_extends);
+    if (trimmed_extends) with_effects.push(trimmed_extends);
 
@@ -170,7 +174,3 @@ for (const prop of this.properties) {
             const trimmed_prop = prop.drop_side_effect_free(compressor);
-            if (trimmed_prop) {
-                if (trimmed_prop.contains_this()) return this;
-
-                with_effects.push(trimmed_prop);
-            }
+            if (trimmed_prop) with_effects.push(trimmed_prop);
         }
@@ -177,0 +177,0 @@ }

lib/compress/drop-unused.js

@@ -73,3 +73,2 @@ /***********************************************************************
     AST_SymbolVar,
-    AST_This,
     AST_Toplevel,
@@ -131,3 +130,2 @@ AST_Unary,
     };
-    var this_def = null;
     var in_use_ids = new Map();
@@ -144,2 +142,3 @@ var fixed_ids = new Map();
     var initializations = new Map();
+    var self_referential_classes = new Set();
 
@@ -158,2 +157,6 @@ // pass 1: find out which symbols are directly used in
         if (node === self) return;
+        if (node instanceof AST_Class && node.has_side_effects(compressor)) {
+            if (node.is_self_referential()) self_referential_classes.add(node);
+            node.visit_nondeferred_class_parts(tw);
+        }
         if (node instanceof AST_Defun || node instanceof AST_DefClass) {
@@ -168,9 +171,2 @@ var node_def = node.name.definition();
 
-            if (node instanceof AST_DefClass && node.has_side_effects(compressor)) {
-                const save_this_def = this_def;
-                this_def = node_def;
-                node.visit_nondeferred_class_parts(tw);
-                this_def = save_this_def;
-            }
-
             map_add(initializations, node_def.id, node);
@@ -181,6 +177,2 @@ return true; // don't go in nested scopes
         const in_root_scope = scope === self;
-        if (node instanceof AST_This && this_def && in_root_scope) {
-            in_use_ids.set(this_def.id, this_def);
-            return true;
-        }
         if (node instanceof AST_SymbolFunarg && in_root_scope) {
@@ -234,2 +226,5 @@ map_add(var_defs_by_id, node.definition().id, node);
     });
+    self_referential_classes.forEach(function (cls) {
+        cls.walk(tw);
+    });
     // pass 3: we should drop declarations not in_use
@@ -236,0 +231,0 @@ var tt = new TreeTransformer(

package.json

@@ -7,3 +7,3 @@ {
   "license": "BSD-2-Clause",
-  "version": "5.29.2",
+  "version": "5.30.0",
   "engines": {
@@ -10,0 +10,0 @@ "node": ">=10"

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Improved metrics

Total package byte prevSize

2151568

increased by0.06%

Lines of code

61053

increased by0.04%

No dependency changes