decodeURIComponent 转码不成功

Question

使用了codeURIComponent对路径/app/list进行转码成%2Fapp%2Flist, 再用decodeURIComponent('%2Fapp%2Flist')转码却转不回来然而在浏览器的console面板上是可以的

Answer 1

var x = encodeURIComponent('/app/list');

decodeURIComponent(x); ///app/list