上传 JSON 数据

使用fetch()来发布json编码的数据。

var url = ‘https://example.com/profile‘;var data = {username: ‘example‘};fetch(url, { method: ‘POST‘, // or ‘PUT‘ body: JSON.stringify(data), // data can be `string` or {object}! headers: new Headers({ ‘Content-Type‘: ‘application/json‘ })}).then(res => res.json()).catch(error => console.error(‘Error:‘, error)).then(response => console.log(‘Success:‘, response));

上传文件

可以使用HTML<input type="file" />输入元素、FormData()和fetch()上传文件。

var formData = new FormData();var fileField = document.querySelector("input[type=‘file‘]");formData.append(‘username‘, ‘abc123‘);formData.append(‘avatar‘, fileField.files[0]);fetch(‘https://example.com/profile/avatar‘, { method: ‘PUT‘, body: formData}).then(response => response.json()).catch(error => console.error(‘Error:‘, error)).then(response => console.log(‘Success:‘, response));

上传多个文件

可以使用HTML<input type="file" />输入元素、FormData()和fetch()上传文件。

var formData = new FormData();var photos = document.querySelector("input[type=‘file‘][multiple]");formData.append(‘title‘, ‘My Vegas Vacation‘);formData.append(‘photos‘, photos.files);fetch(‘https://example.com/posts‘, { method: ‘POST‘, body: formData}).then(response => response.json()).then(response => console.log(‘Success:‘, JSON.stringify(response))).catch(error => console.error(‘Error:‘, error));