问如何从数字创建数组，基于JS中的数字数字？

EN

const str = "64656661756c74"
              .match(/.{2}/g)
              .map(ch => String.fromCharCode(parseInt(ch, 16)))
              .join("");
              
console.log(str);
// "default"

let a = '64656661756c74';

let r = a.replace(/([0-9a-f]{2})/g, (m, a) => String.fromCharCode(parseInt(a, 16)))

console.log(r)

let a = '64656661756c74', r = '';

for (let i = 0; i < a.length; i+=2)
  r += String.fromCharCode(parseInt(a.substring(i, i+2), 16))

console.log(r)

var str = '64656661756c74';
str = str.match(/.{1,2}/g);
console.log(str);