[HTML/CSS/JS] fetch的使用

复制代码
fetch('https://www.XXX.com/todos/1')
  .then(response => response.json())
  .then(data => console.log(data));

复制代码
fetch('https://www.XXX.com/todos/0')
  .then(response => {
    if (!response.ok) {
      throw new Error('网络错误');
    }
    return response.json();
  })
  .then(data => console.log(data))
  .catch(error => console.log(error));

复制代码
fetch('https://www.XXX.com/api', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    username: 'user',
    password: 'pass'
  })
}).then(response => response.json())
  .then(data => console.log(data));

复制代码
fetch('https://www.XXX.com/img.png')
  .then(response => response.blob())
  .then(blob => {
    const url = URL.createObjectURL(blob);
    const img = document.createElement('img');
    img.src = url;
    document.body.appendChild(img);
  });