JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script>
<button onclick="request()">request</button>

JavaScript

function request() {
	const data = {
  	'nameCn': '测试%和9'
  };
	axios.post('/echo/json/', {
  	params: data,
    data: data
  })
  .then(function (response) {
    console.log(response);
  })
  .catch(function (error) {
    console.log(error);
  });
}