function declaration and function expression created by xgqfrms - https://repl.it/Euze/7

function declaration and function expression.js

showState(); 
// output: Ready

console.log("function declaration");

function showState() {
  console.log("Ready");
} 

console.log("function expression");

var showState = function() {
  console.log("Idle");
};

showState();

/*
https://www.sitepoint.com/demystifying-javascript-variable-scope-hoisting/
函数声明完全提升。
这意味着整个函数的主体被移动到顶部。
这允许您在声明之前调用函数：
*/