微信服务号网页授权域名

// 引导用户进入授权页面
let redirectUri = encodeURIComponent('https://yourdomain.com/callback');
let url = `https://open.weixin.qq.com/connect/oauth2/authorize?appid=YOUR_APP_ID&redirect_uri=${redirectUri}&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect`;

window.location.href = url;

// 在回调页面处理授权码
if (window.location.search.includes('code=')) {
    let urlParams = new URLSearchParams(window.location.search);
    let code = urlParams.get('code');
    
    // 使用授权码获取访问令牌和用户信息
    fetch(`https://api.weixin.qq.com/sns/oauth2/access_token?appid=YOUR_APP_ID&secret=YOUR_APP_SECRET&code=${code}&grant_type=authorization_code`)
        .then(response => response.json())
        .then(data => {
            let accessToken = data.access_token;
            let openId = data.openid;
            
            // 获取用户信息
            fetch(`https://api.weixin.qq.com/sns/userinfo?access_token=${accessToken}&openid=${openId}`)
                .then(response => response.json())
                .then(userInfo => {
                    console.log(userInfo);
                });
        });
}