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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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    What’s the difference between map() and forEach() when looping through arrays?

    Asked on Thursday, Sep 25, 2025

    The "map()" and "forEach()" methods both iterate over arrays, but they serve different purposes: "map()" transforms each element and returns a new array, while "forEach()" executes a function for each…

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    What is event delegation and when should I use it for dynamic lists?

    Asked on Wednesday, Sep 24, 2025

    Event delegation is a technique in JavaScript where a single event listener is added to a parent element to manage events for multiple child elements. This is especially useful for dynamic lists where…

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    How do I deploy a Node.js application with JavaScript into production?

    Asked on Tuesday, Sep 23, 2025

    Deploying a Node.js application into production involves several steps to ensure it runs efficiently and securely. Below is a basic example of how you might set up a simple Node.js server for producti…

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    How do I secure an Express.js application?

    Asked on Monday, Sep 22, 2025

    Securing an Express.js application involves implementing various best practices to protect against common vulnerabilities. Here is a basic example of how to set up some security measures in an Express…

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