SOURCE

let indices = [6, 2, 8, 3]; // 索引跳跃值
function convertASEToChar(str) {  
    let base64 = $FunLib.encodeBase64(str).string();
    let charArray = base64.split(''); 
    // 计算数组长度的一半（向下取整）  
    const length = Math.floor(charArray.length / 2);  
    for (let i of indices) {   
        for (let i2 = 0; i2 < length; i2 += i) {  
                const temp = charArray[i2];  
                const i3 = length + i2;
                charArray[i2] = charArray[i3];  
                charArray[i3] = temp;            
        }  
    }  
    return charArray.join('');  
}  
  
// // 示例用法：  
// const charArray = ['a', 'b', 'c', 'd', 'e', 'f']; // 注意：在JavaScript中，这是一个字符串数组  
// const indices = [6, 2, 8, 3]; // 索引跳跃值  
// const result = convertASEToChar(charArray, ...indices);  
// console.log(result); // 输出交换后的数组

let str = 'eyJtZXRob2QiOiJHRVQiLCJ0aW1lc3RhbXAiOjE3MTU3NTc5ODA1NTgsInVybCI6Imh0dHBzOi8vaW50ZXJhY3RpdmUuaG4wNzQ2LmNvbS9hY3Rpdml0aWVzL2FwcENvbHVtbkNvbmZpZy9nZXRDb2x1bW5zT2ZBdmFpbGFibGVNb2RlbD9hcHBJbmZvSWRcdTAwM2Q1OTZcdTAwMjZhcHBNb2RlbElkXHUwMDNkMjk4In0=';

let result = convertASEToChar(str);  
console.log(result); // 输出交换后的数组