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What are Promises in Javascript?
Can you give an example of using a promise in Javascript?
Sure, here's an example of using a promise to fetch some data from a server:

fetch('https://api.example.com/data')
  .then(response => response.json())
  .then(data => {
    // Do something with the data
  })
  .catch(error => {
    console.error(error);
  });

In this example, we're using the fetch API to get some data from a server. The fetch method returns a promise, which we can use to handle the response. The first then() method calls the json() method on the response, which returns another promise, and the second then() method is called with the resolved data. Finally, we catch any errors with the catch() method.