tests/cases/conformance/statements/for-ofStatements/ES3For-ofTypeCheck1.ts(1,15): error TS2494: Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher. ==== tests/cases/conformance/statements/for-ofStatements/ES3For-ofTypeCheck1.ts (1 errors) ==== for (var v of "") { } ~~ !!! error TS2494: Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher.