js 拦截 iframe 请求

// 父页面
const iframe = document.createElement('iframe');
iframe.src = 'https://example.com';
document.body.appendChild(iframe);

window.addEventListener('message', (event) => {
  if (event.origin !== 'https://example.com') return; // 安全检查
  console.log('Received message:', event.data);
});

// iframe页面（https://example.com）
window.parent.postMessage('Hello from iframe!', 'https://parent-origin.com');

const originalFetch = window.fetch;
window.fetch = async (input, init) => {
  console.log('Intercepted fetch request:', input, init);
  try {
    const response = await originalFetch(input, init);
    return response;
  } catch (error) {
    console.error('Fetch error:', error);
    throw error;
  }
};