This option has been removed - it doesn't make much sense for ES6 code anyway (module code is always strict mode code).
You can enable Non-strict mode used inspection in Settings | Editor | Inspections | JavaScript | General to check if JavaScript files are in strict mode, and use `us` Live Template to insert "use strict";
This option has been removed - it doesn't make much sense for ES6 code anyway (module code is always strict mode code).
You can enable Non-strict mode used inspection in Settings | Editor | Inspections | JavaScript | General to check if JavaScript files are in strict mode, and use `us` Live Template to insert "use strict";