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What is the best way to handle error catching in async JavaScript functions so my web app does not crash during live user testing?

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What is the best way to handle error catching in async JavaScript functions so my web app does not crash during live user testing?
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MDN JavaScript async function try catch promise rejection error handling best practicesGoogle ↗
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MDN JavaScript async function try catch promise rejection error handling best practices Google ↗
  1. Using promises - JavaScript · developer.mozilla.org
  2. await - JavaScript · developer.mozilla.org

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