为什么我不能从窗口访问声明的变量？

Question

当我运行function从窗口获取所有可用变量时...它只会正确显示非声明变量

宣布变量后：

1. var
2. let
3. const

代码中断......

怎么回事？ 这可以解决吗？

抬头
我不想使用iframe ......

什么有效

a = 'apple';
b = 'banana';
c = 'cherry';
d = /dog/gi;
e = 'elephant';
f = 'fish';
g = 'ground';
h = 'horse';

windowCounter = 0;

function Variables() {
  for (let i in window) {
    if (window.hasOwnProperty(i)) {
      windowCounter++;
      if (windowCounter > 165) {
        console.log(i+' = '+window[i]);
      }
    }
  };
}
Variables();






问题

let a = 'apple';
const b = 'banana';
const c = 'cherry';
let d = /dog/gi;
var e = 'elephant';
f = 'fish';//This is the only one that works properly
let g = 'ground';
var h = 'horse';

windowCounter = 0;//And this one…

function Variables() {
  for (let i in window) {
    if (window.hasOwnProperty(i)) {
      windowCounter++;
      if (windowCounter > 165) {
        console.log(i+' = '+window[i]);
      }
    }
  };
}
Variables();