Are arrays -constants a myth in php?

Question

JavaScript

A little puzzled now, maybe I misunderstood something.
For some reason, when I decided to enter this code from the

Parse tutorial error: syntax error, unexpected '=>' (T_DOUBLE_ARROW), expecting ']'

Answer 1

handleMail(postData) {
  return axios({
    method: 'post',
    url: '/auth/signin',
    data: postData,
  });
}

const handleSubmit = async e => {
  // some code
  try {
    const { data } = await auth.handleMail(postData);
    console.log('success', data);
  } catch (e) {
    console.log('error', e);
  }
};

Answer 2

Sorry, I made a mistake, I corrected the answer.
Yes, it works since version 7.0, you just have a typo in your code.