axios which comes first headers or params code example

Example 1: how to send header in axios

const username = ''
const password = ''

const token = Buffer.from(`${username}:${password}`, 'utf8').toString('base64')

const url = 'https://...'

axios.post(url, {
  headers: {
    'Authorization': `Basic ${token}`
  }
})

Example 2: axios put

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

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