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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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    How many types of array methods are there?

    Asked on Friday, Nov 14, 2025

    JavaScript provides a variety of array methods to manipulate and interact with arrays. These methods can be categorized based on their functionality, such as mutator methods, accessor methods, and ite…

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    Why does my browser console show a CORS error when importing an ES6 module from a CDN?

    Asked on Friday, Nov 14, 2025

    CORS (Cross-Origin Resource Sharing) errors occur when a web page tries to make requests to a different domain than the one that served the web page, and the server does not allow such requests. When …

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    How can I merge two arrays of objects based on a common key without duplicates in JavaScript?

    Asked on Thursday, Nov 13, 2025

    To merge two arrays of objects based on a common key without duplicates, you can use the "reduce" and "map" methods to create a new array that combines both arrays while ensuring unique entries based …

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    Why does `window` object not exist in Node.js while it does in a browser environment?

    Asked on Wednesday, Nov 12, 2025

    The "window" object is specific to browser environments as it represents the global context of the web page. In Node.js, the global context is represented by the "global" object instead, as Node.js is…

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