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    In JavaScript, error handling is an essential aspect of writing robust code. The language provides several constructs such as throw, try, catch, and finally to handle errors gracefully.

    The throw Statement

    The throw statement allows you to create custom errors. It's a way to produce an exception that can be caught by a catch block. You can throw any expression, and it's recommended to throw an Error object or an instance of an Error subclass like RangeError or TypeError. This is because the thrown error can carry a message and a name that can be used by the catch block to handle the error appropriately.

    // Throwing a custom error
    throw new Error("This is a custom error message");

    The try...catch Mechanism

    The try block lets you define a segment of code to test for errors as it executes. If an error occurs, the catch block is executed, allowing you to handle the error.

    try {
    // Code that may throw an error
    } catch (error) {
    // Code to handle the error
    }

    The finally Block

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  3. The Modern JavaScript Tutorial
    https://javascript.info/promise-error-handling

    Error handling with promises - The Modern JavaScript Tutorial

    • Promises Chaining

      The idea is that the result is passed through the chain of .then handlers.. Here the …

    • Promise API

      Promise.all takes an iterable (usually, an array of promises) and returns a new …

    • Promises, Async/Await

      We want to make this open-source project available for people all around the world. …

    • TR Türkçe

      Error handling with promises. Asynchronous actions may sometimes fail: in case of …

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  4. Mozilla Developer
    https://developer.mozilla.org/.../Promise/catch

    Promise.prototype.catch() - JavaScript | MDN - MDN Web Docs

  5. Question & Answer
  6. Stack Overflow
    https://stackoverflow.com/questions/33043285

    javascript - How to properly catch errors in promises? - Stack …

    How to catch uncaught exception in PromiseJan 16, 2015
    Catching Errors in JavaScript Promises with a First Level try ... catchJul 26, 2014
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  7. JavaScript Tutorial
    https://www.javascripttutorial.net/promise-error-handling

    Promise Error Handling - JavaScript Tutorial

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  8. Modern JavaScript Eğitimi
    https://tr.javascript.info/promise-error-handling

    Error handling with promises - JavaScript

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  9. Mozilla Developer
    https://developer.mozilla.org/.../Guide/Using_promises

    Using promises - JavaScript | MDN - MDN Web Docs

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    Promises
  10. People also ask
    What happens if you throw an error in a promise?
    If you throw an error inside the promise, the catch() method will catch it, not the try/catch. If you chain promises, the catch () method will catch errors that occur in any promise. For example: .then(promise2) .then(promise3) .then(promise4) .catch(err => console.log(err)); Code language: JavaScript (javascript)

    Promise Error Handling - JavaScript Tutorial

    javascripttutorial.net
    How do I catch an exception outside a promise in JavaScript?
    .catch(err => console.log(err)); Code language: JavaScript (javascript) The code throws an error: When you raise an exception outside the promise, you must catch it with try/catch: getUserById('a') .then(user => console.log(user.username)) .catch(err => console.log(`Caught by .catch ${err}`)); console.log(`Caught by try/catch ${error}`);

    Promise Error Handling - JavaScript Tutorial

    javascripttutorial.net
    How to handle a promise error with catch()?
    So .catch(fn) is the same thing as .then(null, fn). In other words, below is a one-line polyfill for catch(): return this.then(null, onRejected); That means you can handle promise errors with .then() as well: const p = Promise.reject(new Error('Oops!'));

    The Promise `catch()` Function in JavaScript - Mastering JS

    masteringjs.io
    How do you handle errors in a promise?
    .catch handles errors in promises of all kinds: be it a reject() call, or an error thrown in a handler. .then also catches errors in the same manner, if given the second argument (which is the error handler). We should place .catch exactly in places where we want to handle errors and know how to handle them.

    Error handling with promises - The Modern JavaScript Tutorial

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  11. W3docs
    https://www.w3docs.com/learn-javascri…

    JavaScript: Error handling with promises - W3docs

    WEBError handling in promises is crucial for writing robust JavaScript code that can deal with unexpected issues without crashing the application. Error handling in promises is accomplished using the .catch() method or by …

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  12. Mastering JS
    https://masteringjs.io/tutorials/fundamentals/catch

    The Promise `catch()` Function in JavaScript - Mastering JS

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  13. hatchjs.com
    https://hatchjs.com/possible-unhandled-promise-rejection

    Possible Unhandled Promise Rejection: What It Is and How to Fix It

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  14. hellojavascript.info
    https://www.hellojavascript.info/docs/general...

    Error Handling with Promises | HelloJavaScript.info

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  15. DevQA.io
    https://devqa.io/javascript-handle-error-promise

    How to Handle Error in Javascript Promise? - DevQA.io

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  16. W3School
    https://www.w3schools.com/jsref/jsref_promise_catch.asp

    JavaScript Promise catch() Method - W3Schools

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    A new Promise Object
  17. DEV Community
    https://dev.to/gitfudge/javascript-error-handling...

    JavaScript: Error handling with Promises and Async/Await

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  18. Stack Overflow
    https://stackoverflow.com/questions/53803876

    javascript - correct way to handle errors inside a Promise - Stack …

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    Javascript Promise Error Handling
  19. JavaScript in Plain English
    https://javascript.plainenglish.io/javascript...

    JavaScript Promises: A Deep Dive into Error Handling and Best …

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  20. Peter Coles
    https://mrcoles.com/javascript-promises-and-errors

    JavaScript Promises and Errors - Peter Coles

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    Peter Coles
  21. joeattardi.dev
    https://joeattardi.dev/understanding-error-handling-in-promise-chains

    Understanding error handling in Promise chains - Joe Attardi ...

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    Joe Attardi
  22. Stack Overflow
    https://stackoverflow.com/questions/30362733

    javascript - Handling errors in Promise.all - Stack Overflow

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  23. FreeCodecamp
    https://www.freecodecamp.org/news/javascript...

    JavaScript Promise Tutorial – How to Resolve or Reject Promises …

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  24. Stack Overflow
    https://stackoverflow.com/questions/26076511

    Handling multiple catches in promise chain - Stack Overflow

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  25. BorntoDev
    https://www.borntodev.com/2024/10/06/error-handling

    จัดการ Error ฉบับไม่ปวดสมอง – BorntoDev เริ่มต้นเรียน …

  26. Stack Overflow
    https://stackoverflow.com/questions/30715367

    javascript - Why can I not throw inside a Promise.catch handler ...

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    Catch Errors in Promises
    Node.js
  27. Stack Overflow
    https://stackoverflow.com/questions/79032761/how...

    node.js - How to Resolve Linting Errors Related to Promise …

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    Node.js
  28. Stack Overflow
    https://stackoverflow.com/questions/79063380/react...

    reactjs - React App.js:31 Uncaught (in promise) TypeError: …

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    Uncaught in Promise Error
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