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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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    How can I ensure a function in JavaScript remains pure when dealing with objects that need modification?

    Asked on Sunday, Dec 07, 2025

    To ensure a function remains pure when dealing with objects, you should avoid modifying the original object and instead return a new object with the desired changes. This can be achieved using techniq…

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    How can I use the spread operator with an object to merge properties while excluding some keys using destructuring?

    Asked on Saturday, Dec 06, 2025

    To merge properties of objects while excluding specific keys, you can use the spread operator along with destructuring assignment. Here's a concise example demonstrating how to achieve this. const ori…

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    How do I handle a fetch request error when the API returns a non-200 status code and still parse the JSON response?

    Asked on Friday, Dec 05, 2025

    To handle a fetch request error when the API returns a non-200 status code and still parse the JSON response, you can check the response status and handle it accordingly. Here's a clean example: fetch…

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    How do tagged template literals in JavaScript affect string interpolation and formatting?

    Asked on Thursday, Dec 04, 2025

    Tagged template literals in JavaScript allow you to customize the processing of template literals, providing more control over string interpolation and formatting. They enable you to manipulate the te…

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