PUT Requests with Axios

The easiest way to make a PUT request with Axios is the axios.put() function. The first parameter to axios.put() is the URL, and the 2nd is the HTTP request body.

const res = await axios.put('https://httpbin.org/put', { hello: 'world' });

res.data.json; // { hello: 'world' }

By default, if the 2nd parameter to axios.put() is an object, Axios serializes the object to JSON using the JSON.stringify() function. If the 2nd parameter is an object, Axios also sets the content-type header to application/json, so most web frameworks, like Express, will be able to automatically convert the request body into a JavaScript object for you.

const res = await axios.put('https://httpbin.org/put', { hello: 'world' });

res.data.headers['Content-Type']; // application/json;charset=utf-8

Form-Encoded Request Bodies

If you pass a string as the body parameter to axios.put(), Axios will set the content-type header to application/x-www-form-urlencoded. That means the request body should be a bunch of key/value pairs separated by &, like key1=value1&key2=value2.

const res = await axios.put('https://httpbin.org/put', 'hello=world');

res.data.form; // { hello: 'world' }
res.data.headers['Content-Type']; // application/x-www-form-urlencoded