terser - npm Package Compare versions

Comparing version 5.31.6 to 5.32.0

CHANGELOG.md

 # Changelog
 
+## v5.32.0
+
+ - `import("module")` can now be input and output from ESTree AST (#1557)
+ - `BigInt` literals can now be input and output from ESTree AST (#1555)
+ - `typeof` an object or array (`typeof {}` and `typeof []`) can now be statically evaluated. (#1546)
+
 ## v5.31.6
@@ -4,0 +10,0 @@ - Retain side effects in a `case` when the expression is a sequence (comma) expression

lib/compress/evaluate.js

@@ -221,10 +221,21 @@ /***********************************************************************
     var e = this.expression;
-    // Function would be evaluated to an array and so typeof would
-    // incorrectly return 'object'. Hence making is a special case.
     if (compressor.option("typeofs")
-        && this.operator == "typeof"
-        && (e instanceof AST_Lambda
+        && this.operator == "typeof") {
+        // Function would be evaluated to an array and so typeof would
+        // incorrectly return 'object'. Hence making is a special case.
+        if (e instanceof AST_Lambda
             || e instanceof AST_SymbolRef
-            && e.fixed_value() instanceof AST_Lambda)) {
-        return typeof function () { };
+            && e.fixed_value() instanceof AST_Lambda) {
+            return typeof function () { };
+        }
+        if (
+            (e instanceof AST_Object
+                || e instanceof AST_Array
+                || (e instanceof AST_SymbolRef
+                    && (e.fixed_value() instanceof AST_Object
+                        || e.fixed_value() instanceof AST_Array)))
+            && !e.has_side_effects(compressor)
+        ) {
+            return typeof {};
+        }
     }
@@ -231,0 +242,0 @@ if (!non_converting_unary.has(this.operator))

lib/mozilla-ast.js

@@ -598,2 +598,15 @@ /***********************************************************************
 
+        ImportExpression: function(M) {
+            return new AST_Call({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz({
+                    type: "Identifier",
+                    name: "import"
+                }),
+                optional: false,
+                args: [from_moz(M.source)]
+            });
+        },
+
         ExportAllDeclaration: function(M) {
@@ -666,2 +679,7 @@ var foreign_name = M.exported == null ?
             }
+            const bi = typeof M.value === "bigint" ? M.value.toString() : M.bigint;
+            if (typeof bi === "string") {
+                args.value = bi;
+                return new AST_BigInt(args);
+            }
             if (val === null) return new AST_Null(args);
@@ -734,10 +752,2 @@ switch (typeof val) {
 
-        BigIntLiteral(M) {
-            return new AST_BigInt({
-                start : my_start_token(M),
-                end   : my_end_token(M),
-                value : M.value
-            });
-        },
-
         EmptyStatement: function(M) {
@@ -1215,2 +1225,10 @@ return new AST_EmptyStatement({
     def_to_moz(AST_Call, function To_Moz_CallExpression(M) {
+        if (M.expression instanceof AST_SymbolRef && M.expression.name === "import") {
+            const [source] = M.args.map(to_moz);
+            return {
+                type: "ImportExpression",
+                source,
+            };
+        }
+
         return {
@@ -1761,4 +1779,9 @@ type: "CallExpression",
     def_to_moz(AST_BigInt, M => ({
-        type: "BigIntLiteral",
-        value: M.value
+        type: "Literal",
+        // value cannot be represented natively
+        // see: https://github.com/estree/estree/blob/master/es2020.md#bigintliteral
+        value: null,
+        // `M.value` is a string that may be a hex number representation.
+        // but "bigint" property should have only decimal digits
+        bigint: typeof BigInt === "function" ? BigInt(M.value).toString() : M.value,
     }));
@@ -1765,0 +1788,0 @@

package.json

@@ -7,3 +7,3 @@ {
   "license": "BSD-2-Clause",
-  "version": "5.31.6",
+  "version": "5.32.0",
   "engines": {
@@ -10,0 +10,0 @@ "node": ">=10"

New alerts

License Policy Violation

License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Fixed alerts

License Policy Violation

License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

2197101

increased by0.14%

Lines of code

62747

increased by0.11%

No dependency changes