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const api = 'https://dog.ceo/api/'

function loadData() {
  fetch(api + '/breeds/list')
    .then(response => response.json())
    .then(data => {
      showData(data.message)
    })
  .catch(err => {
    console.log(err)
  })
}

function showData(data) {
  // do something with data
}