Merge commit '6e92d2345e8231a44556ce7d416451f5f3e6c398' as 'engine262'

engine262/src/static-semantics/IsStrict.mts

@@ -0,0 +1,7 @@
+import type { ParseNode } from '../parser/ParseNode.mts';
+
+/** https://tc39.es/ecma262/#sec-static-semantics-isstrict */
+export function IsStrict({ ScriptBody }: ParseNode.Script) {
+  // 1. If ScriptBody is present and the Directive Prologue of ScriptBody contains a Use Strict Directive, return true; otherwise, return false.
+  return ScriptBody!.strict;
+}