21.1 Yup. eslint: semi jscs: requireSemicolons
// bad
(function () {
const name = 'Skywalker'
return name
})()
// good
(function () {
const name = 'Skywalker';
return name;
}());
// good, but legacy (guards against the function becoming an argument when two files with IIFEs are concatenated)
;((() => {
const name = 'Skywalker';
return name;
})());