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Comparing version 5.47.1 to 5.48.0

CHANGELOG.md

 # Changelog
 
+## v5.48.0
+
+ - Support `import source ...` and `import defer ...` (#1682)
+
 ## v5.47.1
@@ -4,0 +8,0 @@

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

@@ -61,2 +61,3 @@ /***********************************************************************
     AST_Dot,
+    AST_DynamicImport,
     AST_Expansion,
@@ -156,2 +157,8 @@ AST_Function,
 
+def_drop_side_effect_free(AST_DynamicImport, function (compressor, first_in_statement) {
+    if (this.phase !== "source") return this;
+    var args = trim(this.args, compressor, first_in_statement);
+    return args && make_sequence(this, args);
+});
+
 def_drop_side_effect_free(AST_Accessor, return_null);
@@ -158,0 +165,0 @@

lib/compress/inference.js

@@ -72,2 +72,3 @@ /***********************************************************************
   AST_Import,
+  AST_DynamicImport,
   AST_ImportMeta,
@@ -407,2 +408,6 @@ AST_Jump,
     def_has_side_effects(AST_ImportMeta, return_false);
+    def_has_side_effects(AST_DynamicImport, function() {
+        // `import.source(x)` only compiles the module, which is side-effect free
+        return this.phase !== "source";
+    });
     def_has_side_effects(AST_LabeledStatement, function(compressor) {
@@ -409,0 +414,0 @@ return this.body.has_side_effects(compressor);

lib/equivalent-to.js

@@ -32,2 +32,3 @@ import {
     AST_Import,
+    AST_DynamicImport,
     AST_ImportMeta,
@@ -197,3 +198,6 @@ AST_Jump,
 AST_Import.prototype.shallow_cmp = function(other) {
-    return (this.imported_name == null ? other.imported_name == null : this.imported_name === other.imported_name) && (this.imported_names == null ? other.imported_names == null : this.imported_names === other.imported_names) && (this.attributes == null ? other.attributes == null : this.attributes === other.attributes);
+    return (this.imported_name || null) === (other.imported_name || null)
+        && (this.imported_names || null) === (other.imported_names || null)
+        && (this.attributes || null) === (other.attributes || null)
+        && (this.phase || null) === (other.phase || null);
 };
@@ -203,2 +207,6 @@
 
+AST_DynamicImport.prototype.shallow_cmp = function(other) {
+    return (this.phase || null) === (other.phase || null) && this.args.length === other.args.length;
+};
+
 AST_Export.prototype.shallow_cmp = function(other) {
@@ -205,0 +213,0 @@ return (this.exported_definition == null ? other.exported_definition == null : this.exported_definition === other.exported_definition) && (this.exported_value == null ? other.exported_value == null : this.exported_value === other.exported_value) && (this.exported_names == null ? other.exported_names == null : this.exported_names === other.exported_names) && (this.attributes == null ? other.attributes == null : this.attributes === other.attributes) && this.module_name === other.module_name && this.is_default === other.is_default;

lib/size.js

@@ -38,2 +38,3 @@ import {
     AST_Import,
+    AST_DynamicImport,
     AST_ImportMeta,
@@ -280,2 +281,7 @@ AST_Infinity,
 
+AST_DynamicImport.prototype._size = function () {
+    // `import.` + phase + `()` + arg overhead
+    return 9 + this.phase.length + list_overhead(this.args);
+};
+
 AST_Export.prototype._size = function () {
@@ -282,0 +288,0 @@ let size = 7 + (this.is_default ? 8 : 0);

package.json

@@ -7,3 +7,3 @@ {
   "license": "BSD-2-Clause",
-  "version": "5.47.1",
+  "version": "5.48.0",
   "engines": {
@@ -10,0 +10,0 @@ "node": ">=10"

No alert changes

Improved metrics

Total package byte prevSize

2302183

0.37%

Lines of code

65970

0.36%

No dependency changes