关于javascript:如何对字符串进行加密解密

//对字符串加密export function decodeStr(code) {  let c = String.fromCharCode(code.charCodeAt(0) + code.length);  for (let i = 1, len = code.length; i < len; i++) {    c += String.fromCharCode(code.charCodeAt(i) + code.charCodeAt(i - 1));  }  return decodeURI(c);}//字符串进行解密export function uncodeStr(code) {  code = decodeURIComponent(code);  let c = String.fromCharCode(code.charCodeAt(0) - code.length);  for (let i = 1, len = code.length; i < len; i++) {    c += String.fromCharCode(code.charCodeAt(i) - c.charCodeAt(i - 1));  }  return c;}