--data in curl code example

Example 1: curl post json

curl -X POST -H "Content-Type: application/json" \
 -d '{"username":"abc","password":"abc"}' \
 https://api.example.com/v2/login

Example 2: curl post request

curl -d "user=user1&pass=abcd" -X POST https://example.com/login

Example 3: curl what is --data

// Ex: axios post
const options = {
    method: 'POST',
    headers: {},
    data: JSON.stringify({}),
    url: '',
  };
  const something = await axios.post(options);