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How can I deep clone an object in JavaScript without using libraries?

Asked on Wednesday, Mar 25, 2026

To deep clone an object in JavaScript without using libraries, you can use the structuredClone method, which is a built-in function in modern JavaScript. const originalObject = { name: "Alice", detail…

How can I debounce a function call in JavaScript to limit its execution rate?

Asked on Tuesday, Mar 24, 2026

To debounce a function in JavaScript, you can use a technique that delays the execution of the function until after a specified wait time has elapsed since the last time it was invoked. This is useful…

What is the difference between `let` and `var` in JavaScript?

Asked on Monday, Mar 23, 2026

In JavaScript, "let" and "var" are both used to declare variables, but they have different scoping rules and behaviors. "let" is block-scoped, while "var" is function-scoped. // Example of 'let' if (t…

How can I prevent a form from submitting when a button is clicked in JavaScript?

Asked on Sunday, Mar 22, 2026

To prevent a form from submitting when a button is clicked, you can use JavaScript to intercept the form's submit event and call the `preventDefault` method on the event object. Submit document.getEle…