JavaScript
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How to Generate a UUID or GUID in JavaScript (Best Practices for 2025)
Developers often need a way to create unique identifiers (UUIDs or GUIDs) in JavaScript for tasks like user sessions, database keys, or temporary file ...
How to Generate a UU
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How to Replace All Occurrences of a String in JavaScript
When working with strings in JavaScript, you might want to replace all occurrences of a specific word or substring — not just the first one. For exa ...
How to Replace All O
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Should You Use == or === in JavaScript? Understanding Equality Operators and Performance
When writing JavaScript, many developers notice tools like JSLint or ESLint recommending the use of triple equals (===) instead of double equals (==). ...
Should You Use or
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Best Ways to Loop Through an Array in JavaScript (for, forEach, for-of Explained)
Looping through arrays is one of the most common tasks in JavaScript programming. Developers often need to process data stored in arrays, and JavaScri ...
Best Ways to Loop Th
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How to Include One JavaScript File Inside Another (Modern and Legacy Methods)
Many developers wonder how to include one JavaScript file inside another, similar to the way CSS uses @import. The method you choose depends on the en ...
How to Include One J
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Difference Between let and var in JavaScript Explained
In JavaScript, both let and var are used to declare variables — but they behave very differently. Understanding the difference between them is essen ...
Difference Between l
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How to Return Data from an Asynchronous Function in JavaScript
In JavaScript, developers often struggle to return values from functions that perform asynchronous operations such as Ajax requests, file reads, or AP ...
How to Return Data f
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How to Check if a String Contains a Substring in JavaScript
If you’re learning JavaScript and want to check whether a string contains a specific substring, you might look for a method like String.contains(). ...
How to Check if a St
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How to Remove a Property from a JavaScript Object
Sometimes in JavaScript, you need to remove a property from an object while keeping the rest of the object intact. This can be done using the delete o ...
How to Remove a Prop
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Understanding JavaScript Closures: How They Work and Why They’re Useful
Closures are one of the most powerful concepts in JavaScript, but they can be confusing even for developers familiar with functions and variables. A c ...
Understanding JavaSc