Failed to load http://localhost:8080/team.php: Request header field x-jwt-header is not allowed by Access-Control-Allow-Headers in preflight response.

axios 加入header之后，请求出现

Failed to load http://localhost:8080/team.php: Request header field x-jwt-header is not allowed by Access-Control-Allow-Headers in preflight response.

//POST传参序列化(添加请求拦截器)
axios.interceptors.request.use(config => {
    config.headers['x-jwt-header'] = localStorage.token
    return config;
},error =>{
    alert("错误的传参", 'fail')
    return Promise.reject(error)
})

原因是后端没有开启对header的允许。php中输入以下代码即可：

header('Access-Control-Allow-Headers:x-jwt-header,content-type');