fetch封装
程序员文章站
2022-05-02 20:30:15
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1.直接上完整代码
import 'whatwg-fetch'
import 'es6-promise'
export function get(url) {
let result = fetch(url, {
method: 'POST',
credentials: 'include',
headers: {
'Access-Control-Allow-Origin': '*',
'Accept': 'application/json, text/plain, */*'
},
// 设置允许cors跨域
mode: 'cors'
});
return result;
}
// 将对象拼接成 key1=val1&key2=val2&key3=val3 的字符串形式
function obj2params(obj) {
let result = '';
let item;
for (item in obj) {
result += '&' + item + '=' + encodeURIComponent(obj[item]);
}
if (result) {
result = result.slice(1);
}
return result;
}
// 发送 post 请求
export function post(url, paramsObj) {
let result = fetch(url, {
method: 'POST',
credentials: 'include',
headers: {
'Accept': 'application/json, text/plain, */*',
'Content-Type': 'application/x-www-form-urlencoded'
},
body: obj2params(paramsObj)
});
return result;
}
2.使用
import {get} from ‘…/fetch/index’;
get("./mock/list.json").then((res) => {
return res.json();
}).then((json)=>{
this.setState({
dataList: json.data
})
}).catch(function (err) {
console.log(err);
})