fix(es/minifier): Preserve delete of unresolved variables

crates/swc/tests/tsc-references/objectRestReadonly.2.minified.js

@@ -5,6 +5,8 @@ var obj = {
     baz: "qux",
     quux: "quuz"
 };
-obj.foo, delete _object_without_properties(obj, [
+obj.foo;
+var rest = _object_without_properties(obj, [
     "foo"
-]).baz;
+]);
+delete rest.baz;

crates/swc_ecma_minifier/src/compress/optimize/sequences.rs

@@ -1487,13 +1487,18 @@ where
             )
         };
 
-        if b.is_lit()
-            || b.is_class()
-            || b.is_fn_expr()
-            || b.is_arrow()
-            || b.is_await_expr()
-            || b.is_yield_expr()
-        {
+        if match &*b {
+            Expr::Arrow(..)
+            | Expr::Fn(..)
+            | Expr::Class(..)
+            | Expr::Lit(..)
+            | Expr::Await(..)
+            | Expr::Yield(..) => true,
+            Expr::Unary(UnaryExpr {
+                op: op!("delete"), ..
+            }) => true,
+            _ => false,
+        } {
             return Ok(false);
         }
 

crates/swc_ecma_minifier/src/compress/pure/bools.rs

@@ -222,7 +222,7 @@ impl Pure<'_> {
 
             e if is_pure_undefined(&self.expr_ctx, e) => true,
 
-            Expr::Ident(..) => true,
+            Expr::Ident(i) => i.span.ctxt != self.expr_ctx.unresolved_ctxt,
 
             // NaN
             Expr::Bin(BinExpr {

crates/swc_ecma_minifier/tests/benches-full/echarts.js

@@ -3911,7 +3911,8 @@
             for(var roots = this.storage.getRoots(), i = 0; i < roots.length; i++)roots[i] instanceof Group && roots[i].removeSelfFromZr(this);
             this.storage.delAllRoots(), this.painter.clear();
         }, ZRender.prototype.dispose = function() {
-            this.animation.stop(), this.clear(), this.storage.dispose(), this.painter.dispose(), this.handler.dispose(), this.animation = this.storage = this.painter = this.handler = null, delete instances[this.id];
+            var id;
+            this.animation.stop(), this.clear(), this.storage.dispose(), this.painter.dispose(), this.handler.dispose(), this.animation = this.storage = this.painter = this.handler = null, id = this.id, delete instances[id];
         }, ZRender;
     }();
     function init(dom, opts) {

crates/swc_ecma_minifier/tests/benches-full/three.js

@@ -13072,7 +13072,9 @@
             var actions = this._actions, lastInactiveAction = actions[actions.length - 1], cacheIndex = action._cacheIndex;
             lastInactiveAction._cacheIndex = cacheIndex, actions[cacheIndex] = lastInactiveAction, actions.pop(), action._cacheIndex = null;
             var clipUuid = action._clip.uuid, actionsByClip = this._actionsByClip, actionsForClip = actionsByClip[clipUuid], knownActionsForClip = actionsForClip.knownActions, lastKnownAction = knownActionsForClip[knownActionsForClip.length - 1], byClipCacheIndex = action._byClipCacheIndex;
-            lastKnownAction._byClipCacheIndex = byClipCacheIndex, knownActionsForClip[byClipCacheIndex] = lastKnownAction, knownActionsForClip.pop(), action._byClipCacheIndex = null, delete actionsForClip.actionByRoot[(action._localRoot || this._root).uuid], 0 === knownActionsForClip.length && delete actionsByClip[clipUuid], this._removeInactiveBindingsForAction(action);
+            lastKnownAction._byClipCacheIndex = byClipCacheIndex, knownActionsForClip[byClipCacheIndex] = lastKnownAction, knownActionsForClip.pop(), action._byClipCacheIndex = null;
+            var actionByRoot = actionsForClip.actionByRoot, rootUuid = (action._localRoot || this._root).uuid;
+            delete actionByRoot[rootUuid], 0 === knownActionsForClip.length && delete actionsByClip[clipUuid], this._removeInactiveBindingsForAction(action);
         },
         _removeInactiveBindingsForAction: function(action) {
             for(var bindings = action._propertyBindings, i = 0, n = bindings.length; i !== n; ++i){

crates/swc_ecma_minifier/tests/fixture/issues/7045/input.js

@@ -0,0 +1,3 @@
+a = 1;
+delete a;
+console.log(typeof a);

crates/swc_ecma_minifier/tests/fixture/issues/7045/output.js

@@ -0,0 +1 @@
+a = 1, delete a, console.log(typeof a);

crates/swc_ecma_minifier/tests/fixture/next/react-ace/chunks/8a28b14e.d8fbda268ed281a1/output.js

@@ -5734,7 +5734,10 @@
                         }
                     }, this.removeMarker = function(markerId) {
                         var marker = this.$frontMarkers[markerId] || this.$backMarkers[markerId];
-                        marker && (delete (marker.inFront ? this.$frontMarkers : this.$backMarkers)[markerId], this._signal(marker.inFront ? "changeFrontMarker" : "changeBackMarker"));
+                        if (marker) {
+                            var markers = marker.inFront ? this.$frontMarkers : this.$backMarkers;
+                            delete markers[markerId], this._signal(marker.inFront ? "changeFrontMarker" : "changeBackMarker");
+                        }
                     }, this.getMarkers = function(inFront) {
                         return inFront ? this.$frontMarkers : this.$backMarkers;
                     }, this.highlight = function(re) {

crates/swc_ecma_minifier/tests/fixture/next/syncfusion/933-e9f9a6bf671b96fc/output.js

@@ -7859,7 +7859,10 @@
                     if (this.directivekeys) {
                         var changedProps = [], directiveValue = this.validateChildren({}, this.directivekeys, props || this.props);
                         if (directiveValue && Object.keys(directiveValue).length) {
-                            if (!silent && this.skipRefresh) for(var _a = 0, _b = this.skipRefresh; _a < _b.length; _a++)delete directiveValue[_b[_a]];
+                            if (!silent && this.skipRefresh) for(var _a = 0, _b = this.skipRefresh; _a < _b.length; _a++){
+                                var fields = _b[_a];
+                                delete directiveValue[fields];
+                            }
                             if (this.prevProperties) for(var dKeys = Object.keys(this.prevProperties), i = 0; i < dKeys.length; i++){
                                 var key = dKeys[i];
                                 if (directiveValue.hasOwnProperty(key)) {

crates/swc_ecma_minifier/tests/fixture/projects/next/archive-3/pages/dynamic/chunkfilename-b114cf1d23876beaa712/output.js

@@ -35,8 +35,8 @@
                 };
                 if (dynamicOptions instanceof Promise ? loadableOptions1.loader = function() {
                     return dynamicOptions;
-                } : "function" == typeof dynamicOptions ? loadableOptions1.loader = dynamicOptions : "object" == typeof dynamicOptions && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), dynamicOptions)), (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), options)).loadableGenerated && delete (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), loadableOptions1.loadableGenerated)).loadableGenerated, "boolean" == typeof loadableOptions1.ssr) {
-                    if (!loadableOptions1.ssr) return delete loadableOptions1.ssr, delete (loadableOptions = loadableOptions1).webpack, delete loadableOptions.modules, loadableFn(loadableOptions);
+                } : "function" == typeof dynamicOptions ? loadableOptions1.loader = dynamicOptions : "object" == typeof dynamicOptions && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), dynamicOptions)), (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), options)).loadableGenerated && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), loadableOptions1.loadableGenerated), delete loadableOptions1.loadableGenerated), "boolean" == typeof loadableOptions1.ssr) {
+                    if (!loadableOptions1.ssr) return delete loadableOptions1.ssr, loadableOptions = loadableOptions1, delete loadableOptions.webpack, delete loadableOptions.modules, loadableFn(loadableOptions);
                     delete loadableOptions1.ssr;
                 }
                 return loadableFn(loadableOptions1);

crates/swc_ecma_minifier/tests/fixture/projects/next/archive-3/pages/dynamic/function-7fe8439c89afccb77983/output.js

@@ -35,8 +35,8 @@
                 };
                 if (dynamicOptions instanceof Promise ? loadableOptions1.loader = function() {
                     return dynamicOptions;
-                } : "function" == typeof dynamicOptions ? loadableOptions1.loader = dynamicOptions : "object" == typeof dynamicOptions && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), dynamicOptions)), (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), options)).loadableGenerated && delete (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), loadableOptions1.loadableGenerated)).loadableGenerated, "boolean" == typeof loadableOptions1.ssr) {
-                    if (!loadableOptions1.ssr) return delete loadableOptions1.ssr, delete (loadableOptions = loadableOptions1).webpack, delete loadableOptions.modules, loadableFn(loadableOptions);
+                } : "function" == typeof dynamicOptions ? loadableOptions1.loader = dynamicOptions : "object" == typeof dynamicOptions && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), dynamicOptions)), (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), options)).loadableGenerated && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), loadableOptions1.loadableGenerated), delete loadableOptions1.loadableGenerated), "boolean" == typeof loadableOptions1.ssr) {
+                    if (!loadableOptions1.ssr) return delete loadableOptions1.ssr, loadableOptions = loadableOptions1, delete loadableOptions.webpack, delete loadableOptions.modules, loadableFn(loadableOptions);
                     delete loadableOptions1.ssr;
                 }
                 return loadableFn(loadableOptions1);

crates/swc_ecma_minifier/tests/fixture/projects/next/archive-3/pages/dynamic/head-432fc3a9a66c90ce2ec2/output.js

@@ -67,8 +67,8 @@
                 };
                 if (dynamicOptions instanceof Promise ? loadableOptions1.loader = function() {
                     return dynamicOptions;
-                } : "function" == typeof dynamicOptions ? loadableOptions1.loader = dynamicOptions : "object" == typeof dynamicOptions && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), dynamicOptions)), (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), options)).loadableGenerated && delete (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), loadableOptions1.loadableGenerated)).loadableGenerated, "boolean" == typeof loadableOptions1.ssr) {
-                    if (!loadableOptions1.ssr) return delete loadableOptions1.ssr, delete (loadableOptions = loadableOptions1).webpack, delete loadableOptions.modules, loadableFn(loadableOptions);
+                } : "function" == typeof dynamicOptions ? loadableOptions1.loader = dynamicOptions : "object" == typeof dynamicOptions && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), dynamicOptions)), (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), options)).loadableGenerated && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), loadableOptions1.loadableGenerated), delete loadableOptions1.loadableGenerated), "boolean" == typeof loadableOptions1.ssr) {
+                    if (!loadableOptions1.ssr) return delete loadableOptions1.ssr, loadableOptions = loadableOptions1, delete loadableOptions.webpack, delete loadableOptions.modules, loadableFn(loadableOptions);
                     delete loadableOptions1.ssr;
                 }
                 return loadableFn(loadableOptions1);

crates/swc_ecma_minifier/tests/fixture/projects/next/archive-3/pages/dynamic/multiple-modules-d02ebebcfa5282e50b34/output.js

@@ -35,8 +35,8 @@
                 };
                 if (dynamicOptions instanceof Promise ? loadableOptions1.loader = function() {
                     return dynamicOptions;
-                } : "function" == typeof dynamicOptions ? loadableOptions1.loader = dynamicOptions : "object" == typeof dynamicOptions && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), dynamicOptions)), (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), options)).loadableGenerated && delete (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), loadableOptions1.loadableGenerated)).loadableGenerated, "boolean" == typeof loadableOptions1.ssr) {
-                    if (!loadableOptions1.ssr) return delete loadableOptions1.ssr, delete (loadableOptions = loadableOptions1).webpack, delete loadableOptions.modules, loadableFn(loadableOptions);
+                } : "function" == typeof dynamicOptions ? loadableOptions1.loader = dynamicOptions : "object" == typeof dynamicOptions && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), dynamicOptions)), (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), options)).loadableGenerated && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), loadableOptions1.loadableGenerated), delete loadableOptions1.loadableGenerated), "boolean" == typeof loadableOptions1.ssr) {
+                    if (!loadableOptions1.ssr) return delete loadableOptions1.ssr, loadableOptions = loadableOptions1, delete loadableOptions.webpack, delete loadableOptions.modules, loadableFn(loadableOptions);
                     delete loadableOptions1.ssr;
                 }
                 return loadableFn(loadableOptions1);

crates/swc_ecma_minifier/tests/fixture/projects/next/archive-3/pages/dynamic/nested-05a7ce04b1f7eb6da341/output.js

@@ -35,8 +35,8 @@
                 };
                 if (dynamicOptions instanceof Promise ? loadableOptions1.loader = function() {
                     return dynamicOptions;
-                } : "function" == typeof dynamicOptions ? loadableOptions1.loader = dynamicOptions : "object" == typeof dynamicOptions && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), dynamicOptions)), (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), options)).loadableGenerated && delete (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), loadableOptions1.loadableGenerated)).loadableGenerated, "boolean" == typeof loadableOptions1.ssr) {
-                    if (!loadableOptions1.ssr) return delete loadableOptions1.ssr, delete (loadableOptions = loadableOptions1).webpack, delete loadableOptions.modules, loadableFn(loadableOptions);
+                } : "function" == typeof dynamicOptions ? loadableOptions1.loader = dynamicOptions : "object" == typeof dynamicOptions && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), dynamicOptions)), (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), options)).loadableGenerated && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), loadableOptions1.loadableGenerated), delete loadableOptions1.loadableGenerated), "boolean" == typeof loadableOptions1.ssr) {
+                    if (!loadableOptions1.ssr) return delete loadableOptions1.ssr, loadableOptions = loadableOptions1, delete loadableOptions.webpack, delete loadableOptions.modules, loadableFn(loadableOptions);
                     delete loadableOptions1.ssr;
                 }
                 return loadableFn(loadableOptions1);

crates/swc_ecma_minifier/tests/fixture/projects/next/archive-3/pages/dynamic/no-chunk-e2d9573b8d7df68a6cde/output.js

@@ -146,8 +146,8 @@
                 };
                 if (dynamicOptions instanceof Promise ? loadableOptions1.loader = function() {
                     return dynamicOptions;
-                } : "function" == typeof dynamicOptions ? loadableOptions1.loader = dynamicOptions : "object" == typeof dynamicOptions && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), dynamicOptions)), (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), options)).loadableGenerated && delete (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), loadableOptions1.loadableGenerated)).loadableGenerated, "boolean" == typeof loadableOptions1.ssr) {
-                    if (!loadableOptions1.ssr) return delete loadableOptions1.ssr, delete (loadableOptions = loadableOptions1).webpack, delete loadableOptions.modules, loadableFn(loadableOptions);
+                } : "function" == typeof dynamicOptions ? loadableOptions1.loader = dynamicOptions : "object" == typeof dynamicOptions && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), dynamicOptions)), (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), options)).loadableGenerated && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), loadableOptions1.loadableGenerated), delete loadableOptions1.loadableGenerated), "boolean" == typeof loadableOptions1.ssr) {
+                    if (!loadableOptions1.ssr) return delete loadableOptions1.ssr, loadableOptions = loadableOptions1, delete loadableOptions.webpack, delete loadableOptions.modules, loadableFn(loadableOptions);
                     delete loadableOptions1.ssr;
                 }
                 return loadableFn(loadableOptions1);

crates/swc_ecma_minifier/tests/fixture/projects/next/archive-3/pages/dynamic/no-ssr-9ced90e71a0d75a11cdd/output.js

@@ -35,8 +35,8 @@
                 };
                 if (dynamicOptions instanceof Promise ? loadableOptions1.loader = function() {
                     return dynamicOptions;
-                } : "function" == typeof dynamicOptions ? loadableOptions1.loader = dynamicOptions : "object" == typeof dynamicOptions && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), dynamicOptions)), (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), options)).loadableGenerated && delete (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), loadableOptions1.loadableGenerated)).loadableGenerated, "boolean" == typeof loadableOptions1.ssr) {
-                    if (!loadableOptions1.ssr) return delete loadableOptions1.ssr, delete (loadableOptions = loadableOptions1).webpack, delete loadableOptions.modules, loadableFn(loadableOptions);
+                } : "function" == typeof dynamicOptions ? loadableOptions1.loader = dynamicOptions : "object" == typeof dynamicOptions && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), dynamicOptions)), (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), options)).loadableGenerated && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), loadableOptions1.loadableGenerated), delete loadableOptions1.loadableGenerated), "boolean" == typeof loadableOptions1.ssr) {
+                    if (!loadableOptions1.ssr) return delete loadableOptions1.ssr, loadableOptions = loadableOptions1, delete loadableOptions.webpack, delete loadableOptions.modules, loadableFn(loadableOptions);
                     delete loadableOptions1.ssr;
                 }
                 return loadableFn(loadableOptions1);

crates/swc_ecma_minifier/tests/fixture/projects/next/archive-3/pages/dynamic/no-ssr-custom-loading-7f61b2e27708ca1854e0/output.js

@@ -35,8 +35,8 @@
                 };
                 if (dynamicOptions instanceof Promise ? loadableOptions1.loader = function() {
                     return dynamicOptions;
-                } : "function" == typeof dynamicOptions ? loadableOptions1.loader = dynamicOptions : "object" == typeof dynamicOptions && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), dynamicOptions)), (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), options)).loadableGenerated && delete (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), loadableOptions1.loadableGenerated)).loadableGenerated, "boolean" == typeof loadableOptions1.ssr) {
-                    if (!loadableOptions1.ssr) return delete loadableOptions1.ssr, delete (loadableOptions = loadableOptions1).webpack, delete loadableOptions.modules, loadableFn(loadableOptions);
+                } : "function" == typeof dynamicOptions ? loadableOptions1.loader = dynamicOptions : "object" == typeof dynamicOptions && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), dynamicOptions)), (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), options)).loadableGenerated && (loadableOptions1 = _objectSpread(_objectSpread({}, loadableOptions1), loadableOptions1.loadableGenerated), delete loadableOptions1.loadableGenerated), "boolean" == typeof loadableOptions1.ssr) {
+                    if (!loadableOptions1.ssr) return delete loadableOptions1.ssr, loadableOptions = loadableOptions1, delete loadableOptions.webpack, delete loadableOptions.modules, loadableFn(loadableOptions);
                     delete loadableOptions1.ssr;
                 }
                 return loadableFn(loadableOptions1);