(() => console.log("a"))() (() => console.log("b"))()

(() => console.log("b"))() ^ TypeError: (intermediate value)(...) is not a function at Object.<anonymous> (D:\workspace\fb\helloworld\helloworld.js:2:1) at Module._compile (module.js:635:30) at Object.Module._extensions..js (module.js:646:10) at Module.load (module.js:554:32) at tryModuleLoad (module.js:497:12) at Function.Module._load (module.js:489:3) at Function.Module.runMain (module.js:676:10) at startup (bootstrap_node.js:187:16) at bootstrap_node.js:608:3 a

(() => console.log("a"))(); (() => console.log("b"))()