js access做留言板

function checkLoginStatus() {
    // 假设使用localStorage存储登录状态
    if (!localStorage.getItem('userToken')) {
        alert('请先登录！');
        return false;
    }
    return true;
}

document.getElementById('submitBtn').addEventListener('click', function() {
    if (!checkLoginStatus()) return;
    // 提交留言的逻辑...
});

function sanitizeInput(input) {
    // 使用正则表达式移除潜在的危险字符
    return input.replace(/<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi, '');
}

document.getElementById('messageInput').addEventListener('input', function(e) {
    e.target.value = sanitizeInput(e.target.value);
});

function loadMessages(page = 1) {
    fetch(`/api/messages?page=${page}`)
        .then(response => response.json())
        .then(data => {
            data.messages.forEach(msg => {
                const div = document.createElement('div');
                div.textContent = msg.content;
                document.getElementById('messagesContainer').appendChild(div);
            });
        });
}