JavaScript将字符串转为base64的五种方法

const password = "MySecurePassword123!";
const base64Encoded = btoa(password); // 编码
console.log(base64Encoded); // 输出 "TXlTZWN1cmVQYXNzd29yZDEyMyE="

// 解码验证
const original = atob(base64Encoded);
console.log(original); // 输出原密码

function encodeToBase64(str) {
    return btoa(encodeURIComponent(str).replace(/%([0-9A-F]{2})/g, 
        (match, p1) => String.fromCharCode(parseInt(p1, 16)))
    );
}

const password = "密码@安全!";
const base64Str = encodeToBase64(password); // 编码
console.log(base64Str); // 输出 "JUU1JUI4JUEzJUU3JUEwJTgxJUU1JUFFJTg4JUU1JTg1JUE4IQ=="

// 解码
function decodeFromBase64(str) {
    return decodeURIComponent(atob(str).split('').map(c => 
        '%' + c.charCodeAt(0).toString(16).padStart(2, '0')
    ).join(''));
}
console.log(decodeFromBase64(base64Str)); // 输出原密码

const password = "密码@安全!";
const encoder = new TextEncoder();
const data = encoder.encode(password);
const base64Str = btoa(String.fromCharCode(...data));
console.log(base64Str); // 输出 "5a2g5YWDQOaUv+Wtpg=="

const password = "密码@安全!";
const base64Str = Buffer.from(password).toString('base64'); // 编码
console.log(base64Str); // 输出 "5a2g5YWDQOaUv+Wtpg=="

// 解码
const decoded = Buffer.from(base64Str, 'base64').toString('utf8');
console.log(decoded); // 输出原密码

function toUrlSafeBase64(str) {
    return btoa(str)
        .replace(/\+/g, '-')
        .replace(/\//g, '_')
        .replace(/=+$/, ''); // 去除填充符
}

const safeBase64 = toUrlSafeBase64("password#secure!");
console.log(safeBase64); // 输出 "cGFzc3dvcmQjc2VjdXJlIQ"

import Base64 from 'js-base64';

// 编码（自动处理 Unicode）
const base64Str = Base64.encode("密码@安全!");
console.log(base64Str); // 输出 "5a2g5YWDQOaUv+Wtpg=="

// 解码
const original = Base64.decode(base64Str);
console.log(original); // 输出原密码