fetch知识点汇总

使用XHR发送一个json请求一般是这样:

1 const xhr = new XMLHttpRequest() 2 xhr.open('Get', url) 3 xhr.responseType = 'json' 4 5 xhr.onload = () => { 6 console.log(xhr.response) 7 } 8 9 xhr.onerror = () => { 10 console.log('error') 11 } 12 13 xhr.send()