JS: support import.meta as expression statements, fixes #819

Author: tdewolff

js/js.go

@@ -267,7 +267,7 @@ func (m *jsMinifier) minifyStmt(i js.IStmt) {
 		m.minifyExpr(stmt.Init, js.OpExpr)
 		m.write(closeParenOpenBracketBytes)
 		m.needsSemicolon = false
-		for i, _ := range stmt.List {
+		for i := range stmt.List {
 			stmt.List[i].List = optimizeStmtList(stmt.List[i].List, defaultBlock)
 		}
 		m.renamer.renameScope(stmt.Scope)
@@ -1194,10 +1194,6 @@ func (m *jsMinifier) minifyExpr(i js.IExpr, prec js.OpPrec) {
 		m.write(newTargetBytes)
 		m.writeSpaceBeforeIdent()
 	case *js.ImportMetaExpr:
-		if m.expectExpr == expectExprStmt {
-			m.write(openParenBytes)
-			m.groupedStmt = true
-		}
 		m.write(importMetaBytes)
 		m.writeSpaceBeforeIdent()
 	case *js.YieldExpr:

js/js_test.go

@@ -561,7 +561,9 @@ func TestJS(t *testing.T) {
 		{`(a?.b.c).d`, `a?.b.c.d`},
 		{`class a extends (new b){}`, `class a extends new b{}`},
 		{`(new.target)`, `new.target`},
-		{`(import.meta)`, `(import.meta)`},
+		{`(import.meta)`, `import.meta`},
+		{`import.meta.url`, `import.meta.url`},
+		{`super.name`, `super.name`},
 		{"(`tmpl`)", "`tmpl`"},
 		{"(a`tmpl`)", "a`tmpl`"},
 		{"a=-(b=5)", "a=-(b=5)"},