Promise Error Handling

• Some asynchronous operations can fail (especially network operations)
• Promises have a .catch method to handle errors
• This cannot be done in a normal try / catch block because the code has moved on

fetch("https://some-site.com")
    .then(resp => resp.json())
    .then(data => console.log(data))
    .catch(e => console.error("Oh no! There was an error!"))