const envSpecific = { domain: do { if (env === "production") "https://abc.mno.com/"; else if (env === "development") "http://localhost:4000"; }, }; let x = do { let tmp = f(); tmp * tmp + 1; }; let y = do { if (foo()) { f(); } else if (bar()) { g(); } else { h(); } }; function foo() { return ( ); } (do {}); (do {} + 1); 1 + do {}; () => do {}; (do { switch (0) { case 0: "foo"; case 1: break; } }); () => do { var obj = { foo: "bar", bar: "foo" }; for (var key in obj) { obj[key]; } };