uglify-js - npm Package Compare versions

Comparing version 3.12.8 to 3.13.0

lib/scope.js

@@ -48,2 +48,3 @@ /***********************************************************************
     this.eliminated = 0;
+    this.exported = false;
     this.global = false;
@@ -95,2 +96,3 @@ this.id = id;
         return this.global && !options.toplevel
+            || this.exported
             || this.undeclared
@@ -111,2 +113,3 @@ || !options.eval && this.scope.pinned()
     if (parent instanceof AST_DestructuredKeyVal) return node;
+    if (parent instanceof AST_ForEnumeration) return parent.init === node && node;
     if (parent instanceof AST_Unary) return unary_side_effects[parent.operator] && parent.expression;
@@ -124,7 +127,31 @@ }
     var defun = null;
+    var exported = false;
     var next_def_id = 0;
     var scope = self.parent_scope = null;
     var tw = new TreeWalker(function(node, descend) {
+        if (node instanceof AST_DefClass) {
+            var save_exported = exported;
+            exported = tw.parent() instanceof AST_ExportDeclaration;
+            node.name.walk(tw);
+            exported = save_exported;
+            walk_scope(function() {
+                if (node.extends) node.extends.walk(tw);
+                node.properties.forEach(function(prop) {
+                    prop.walk(tw);
+                });
+            });
+            return true;
+        }
+        if (node instanceof AST_Definitions) {
+            var save_exported = exported;
+            exported = tw.parent() instanceof AST_ExportDeclaration;
+            descend();
+            exported = save_exported;
+            return true;
+        }
         if (node instanceof AST_LambdaDefinition) {
+            var save_exported = exported;
+            exported = tw.parent() instanceof AST_ExportDeclaration;
             node.name.walk(tw);
+            exported = save_exported;
             walk_scope(function() {
@@ -176,5 +203,7 @@ node.argnames.forEach(function(argname) {
         } else if (node instanceof AST_SymbolConst) {
-            scope.def_variable(node).defun = defun;
+            var def = scope.def_variable(node);
+            def.defun = defun;
+            def.exported = exported;
         } else if (node instanceof AST_SymbolDefun) {
-            defun.def_function(node, tw.parent());
+            defun.def_function(node, tw.parent()).exported = exported;
             entangle(defun, scope);
@@ -188,5 +217,5 @@ } else if (node instanceof AST_SymbolFunarg) {
         } else if (node instanceof AST_SymbolLet) {
-            scope.def_variable(node);
+            scope.def_variable(node).exported = exported;
         } else if (node instanceof AST_SymbolVar) {
-            defun.def_variable(node, null);
+            defun.def_variable(node, node instanceof AST_SymbolImport ? undefined : null).exported = exported;
             entangle(defun, scope);
@@ -308,2 +337,9 @@ }
             }
+            if (sym.init instanceof AST_LambdaDefinition && sym.scope !== sym.init.name.scope) {
+                var scope = node.scope;
+                do {
+                    if (scope === sym.init.name.scope) break;
+                } while (scope = scope.parent_scope);
+                if (!scope) sym.init = undefined;
+            }
             node.thedef = sym;
@@ -428,3 +464,5 @@ node.reference(options);
         push_uniq(s.enclosed, def);
-        if (options.keep_fnames) {
+        if (!options) {
+            delete s._var_names;
+        } else if (options.keep_fnames) {
             s.functions.each(function(d) {
@@ -431,0 +469,0 @@ push_uniq(def.scope.enclosed, d);

lib/transform.js

@@ -150,2 +150,11 @@ /***********************************************************************
     DEF(AST_AsyncArrow, transform_arrow);
+    DEF(AST_Class, function(self, tw) {
+        if (self.name) self.name = self.name.transform(tw);
+        if (self.extends) self.extends = self.extends.transform(tw);
+        self.properties = do_list(self.properties, tw);
+    });
+    DEF(AST_ClassProperty, function(self, tw) {
+        if (self.key instanceof AST_Node) self.key = self.key.transform(tw);
+        if (self.value) self.value = self.value.transform(tw);
+    });
     DEF(AST_Call, function(self, tw) {
@@ -208,2 +217,16 @@ self.expression = self.expression.transform(tw);
     });
+    DEF(AST_ExportDeclaration, function(self, tw) {
+        self.body = self.body.transform(tw);
+    });
+    DEF(AST_ExportDefault, function(self, tw) {
+        self.body = self.body.transform(tw);
+    });
+    DEF(AST_ExportReferences, function(self, tw) {
+        self.properties = do_list(self.properties, tw);
+    });
+    DEF(AST_Import, function(self, tw) {
+        if (self.all) self.all = self.all.transform(tw);
+        if (self.default) self.default = self.default.transform(tw);
+        if (self.properties) self.properties = do_list(self.properties, tw);
+    });
     DEF(AST_Template, function(self, tw) {
@@ -210,0 +233,0 @@ if (self.tag) self.tag = self.tag.transform(tw);

lib/utils.js

@@ -241,3 +241,3 @@ /***********************************************************************
 // a statement.
-function first_in_statement(stack, arrow) {
+function first_in_statement(stack, arrow, export_default) {
     var node = stack.parent(-1);
@@ -253,2 +253,4 @@ for (var i = 0, p; p = stack.parent(i++); node = p) {
             if (p.condition === node) continue;
+        } else if (p instanceof AST_ExportDefault) {
+            return export_default;
         } else if (p instanceof AST_PropAccess) {
@@ -258,4 +260,4 @@ if (p.expression === node) continue;
             if (p.expressions[0] === node) continue;
-        } else if (p instanceof AST_Statement) {
-            return p.body === node;
+        } else if (p instanceof AST_SimpleStatement) {
+            return true;
         } else if (p instanceof AST_Template) {
@@ -262,0 +264,0 @@ if (p.tag === node) continue;

package.json

@@ -6,3 +6,3 @@ {
   "license": "BSD-2-Clause",
-  "version": "3.12.8",
+  "version": "3.13.0",
   "engines": {
@@ -9,0 +9,0 @@ "node": ">=0.8.0"

README.md

@@ -7,8 +7,7 @@ UglifyJS 3
 #### Note:
-- **`uglify-js@3` has a simplified [API](#api-reference) and [CLI](#command-line-usage)
-  that is not backwards compatible with [`uglify-js@2`](https://github.com/mishoo/UglifyJS/tree/v2.x)**.
-- **Documentation for UglifyJS `2.x` releases can be found [here](https://github.com/mishoo/UglifyJS/tree/v2.x)**.
-- `uglify-js` supports ECMAScript 5 and some newer language features.
-- To minify ECMAScript 2015 or above, you may need to transpile using tools like
-  [Babel](https://babeljs.io/).
+- `uglify-js` supports JavaScript and most language features in ECMAScript.
+- For more exotic parts of ECMAScript, process your source file with transpilers
+  like [Babel](https://babeljs.io/) before passing onto `uglify-js`.
+- `uglify-js@3` has a simplified [API](#api-reference) and [CLI](#command-line-usage)
+  that is not backwards compatible with [`uglify-js@2`](https://github.com/mishoo/UglifyJS/tree/v2.x).
 
@@ -90,3 +89,3 @@ Install
                                                3 - original
-                                `wrap_iife`  Wrap IIFEs in parenthesis. Note: you may
+                                `wrap_iife`  Wrap IIFEs in parentheses. Note: you may
                                              want to disable `negate_iife` under
@@ -672,3 +671,3 @@ compressor options.
 
-- `functions` (default: `true`) -- convert declarations from `var`to `function`
+- `functions` (default: `true`) -- convert declarations from `var` to `function`
   whenever possible.
@@ -678,2 +677,5 @@
 
+- `hoist_exports` (default: `true`) -- hoist `export` statements to facilitate
+  various `compress` and `mangle` optimizations.
+
 - `hoist_funs` (default: `false`) -- hoist function declarations
@@ -692,2 +694,4 @@
 
+- `imports` (default: `true`) -- drop unreferenced import symbols when used with `unused`
+
 - `inline` (default: `true`) -- inline calls to function with simple/`return` statement:
@@ -694,0 +698,0 @@ - `false` -- same as `0`

tools/exports.js

 exports["Dictionary"] = Dictionary;
+exports["is_statement"] = is_statement;
 exports["List"] = List;
@@ -3,0 +4,0 @@ exports["minify"] = minify;

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Improved metrics

Total package byte prevSize

1095792

increased by4.39%

Lines of code

28032

increased by4.34%

Number of lines in readme file

1288

increased by0.31%

No dependency changes