WEBVTT

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When the page loads we're fetching the
list of breeds and the random breed image.

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JavaScript promises provide an
easier more efficient way to fire off and

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keep track of multiple async operations
concurrently or at the same time.

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with the Promise.all method.

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Promise.all joins two or more promises and

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returns only when all the specified
promises have completed or been rejected.

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Then, we determine what to do next.

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For instance, we can use
Promise.all to fetch our two URLs.