// 没有指定请求头的content-type
var data = {age: 18};
$.ajax({
    url: ‘‘,
    type: ‘POST‘,
    data: data
    dataType: ‘json‘,
    success: function(result) {
        // do something
    }
})

import axios from ‘axios‘;
import qs from ‘qs‘;

var data = {age: 18};
var url = ‘‘;

axios.post(
    url, 
    qs.stringify(data), 
    {headers: {‘Content-Type‘: ‘application/x-www-form-urlencoded‘}}
).then(result => {
    // do something
})