Axios Http client - How to construct Http Post url with form params

Why pull in another library or module to do something so simple with pure vanilla JavaScript? It's really one line of JS to produce the desired data to submit in your POST request.

// es6 example

const params = {
  format: 'json',
  option: 'value'
};

const data = Object.keys(params)
  .map((key) => `${key}=${encodeURIComponent(params[key])}`)
  .join('&');

console.log(data);
// => format=json&option=value

const options = {
  method: 'POST',
  headers: { 'content-type': 'application/x-www-form-urlencoded' },
  data,
  url: 'https://whatever.com/api',
};

const response = await axios(options);  // wrap in async function
console.log(response);

You have to do the following:

var querystring = require('querystring');
//...
axios.post(authServerUrl + token_access_path,
    querystring.stringify({
            username: 'abcd', //gave the values directly for testing
            password: '1235!',
            client_id: 'user-client'
    }), {
      headers: { 
        "Content-Type": "application/x-www-form-urlencoded"
      }
    }).then(function(response) {
        console.log(response);
    });

If your target runtime supports it, Axios is able to accept a URLSearchParams instance which will also set the appropriate Content-type header to application/x-www-form-urlencoded

axios.post(authServerUrl + token_access_path, new URLSearchParams({
  username: 'abcd', //gave the values directly for testing
  password: '1235!',
  client_id: 'user-client'
}))

---

The same goes for the fetch API

fetch(url, {
  method: "POST",
  body: new URLSearchParams({
    your: "object",
    props: "go here"
  })
})