模仿axios的get和post

// 模仿axios的get请求
function get(url, params) {
  return new Promise((resolve, reject) => {
    // 构造请求参数
    let requestUrl = url;
    if (params) {
      const paramsStr = Object.keys(params).map(key => `${encodeURIComponent(key)}=${encodeURIComponent(params[key])}`).join('&');
      requestUrl += `?${paramsStr}`;
    }

    // 发送GET请求
    fetch(requestUrl, {
      method: 'GET',
      headers: {
        'Content-Type': 'application/json'
      }
    })
      .then(response => response.json())
      .then(data => resolve(data))
      .catch(error => reject(error));
  });
}

// 模仿axios的post请求
function post(url, data) {
  return new Promise((resolve, reject) => {
    // 发送POST请求
    fetch(url, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json'
      },
      body: JSON.stringify(data)
    })
      .then(response => response.json())
      .then(data => resolve(data))
      .catch(error => reject(error));
  });
}