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Discover clear, example-based answers to real JavaScript challenges. From functions, arrays, and DOM manipulation to ES6+ syntax and async programming, every response is written to help you understand how and why things work. Whether you’re building interactive sites or learning core logic, these Q&As make JavaScript easier and more powerful.

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    JavaScript Q&A's are automatically generated daily after 12:00 AM through our proprietary AI-assisted system. Just like humans, AI sometimes revisits similar questions — because new data or insights can lead to different answers. Purchase tags to help expand and support the Q&A Network.

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    Why am I getting "Uncaught SyntaxError: Unexpected token export" when trying to use ES6 modules in my browser?

    Asked on Saturday, Oct 25, 2025

    The "Uncaught SyntaxError: Unexpected token export" error occurs when you try to use ES6 modules in a browser that does not support them, or when you haven't set up your environment correctly to recog…

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    Why might `catch` not trigger when a promise fails, and how can I ensure proper error handling in async functions?

    Asked on Friday, Oct 24, 2025

    When using promises in JavaScript, the `catch` block might not trigger if the promise is not properly rejected or if errors are not propagated correctly. To ensure proper error handling in async funct…

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    How can I use destructuring to swap values of two variables in JavaScript?

    Asked on Thursday, Oct 23, 2025

    Destructuring in JavaScript provides a concise way to swap the values of two variables without needing a temporary variable. Here's how you can do it: let a = 1; let b = 2; [a, b] = [b, a]; console.lo…

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    How can I merge two arrays of objects by a unique key in JavaScript while preserving all properties?

    Asked on Wednesday, Oct 22, 2025

    To merge two arrays of objects by a unique key in JavaScript while preserving all properties, you can use the "map" and "reduce" methods. This approach ensures that objects with the same key are combi…

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