javascript メソッドを短縮して利用する

let c = console.log;

c("hello"); // hello
c("world"); // world

let c = console.log;
let m = Math.floor;

c((1.23)); // 1
c(m(-1.23)); // -2

let w = document.write;
w("hello"); // Uncaught TypeError: Illegal invocation

ncaught TypeError: 'write' called on an object that does not implement interface Document.

const w = hoge => document.write(hoge);
w("hello");