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Comparing version 5.27.1 to 5.27.2

CHANGELOG.md

 # Changelog
 
+## v5.27.2
+ - Recognise `this` as a reference to the surrounding class in `drop_unused`. Closes #1472
+
 ## v5.27.1
@@ -4,0 +7,0 @@ - Fixed case where `collapse_vars` inlines `await` expressions into non-async functions.

lib/compress/drop-unused.js

@@ -73,2 +73,3 @@ /***********************************************************************
     AST_SymbolVar,
+    AST_This,
     AST_Toplevel,
@@ -130,2 +131,3 @@ AST_Unary,
     };
+    var this_def = null;
     var in_use_ids = new Map();
@@ -142,2 +144,3 @@ var fixed_ids = new Map();
     var initializations = new Map();
+
     // pass 1: find out which symbols are directly used in
@@ -155,7 +158,2 @@ // this scope (not in nested scopes).
         if (node === self) return;
-        if (node instanceof AST_Class) {
-            if (node.has_side_effects(compressor)) {
-                node.visit_nondeferred_class_parts(tw);
-            }
-        }
         if (node instanceof AST_Defun || node instanceof AST_DefClass) {
@@ -170,2 +168,9 @@ 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);
@@ -176,2 +181,6 @@ 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) {
@@ -178,0 +187,0 @@ map_add(var_defs_by_id, node.definition().id, node);

package.json

@@ -7,3 +7,3 @@ {
   "license": "BSD-2-Clause",
-  "version": "5.27.1",
+  "version": "5.27.2",
   "engines": {
@@ -10,0 +10,0 @@ "node": ">=10"

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Improved metrics

Total package byte prevSize

2125374

increased by0.03%

Lines of code

60424

increased by0.02%

No dependency changes