Debouncing Example

[ { "id": 1, "slug": "understanding-hoisting-and-closures-in-javascript", "title": "Understanding Hoisting and Closures in JavaScript", "description": "A comprehensive guide to understanding hoisting and closures in JavaScript.", "introduction": "In this blog post, we will delve into two important concepts in JavaScript: hoisting and closures. Understanding these concepts is crucial for mastering JavaScript.", "date": "18-06-2024", "mainImage": "./hoisting-closures.png", "tags": ["tech", "javascript", "hoisting", "closures"], "readTime": "2 min read", "content": [ { "slNo": "1", "heading": "What is Hoisting?", "html": "JavaScript Hoisting refers to the process whereby the interpreter appears to move the declaration of functions, variables, classes, or imports to the top of their scope, prior to execution of the code.", "codeType": "javascript", "code": "console.log(x); // Output: undefined\nvar x = 5;\nconsole.log(x); // Output: 5", "image": "" }, { "slNo": "2", "heading": "Hoisting of Functions", "html": "The below code runs without any error, despite the hoistedFunction() function being called before it's declared. This is because the JavaScript interpreter hoists the entire function declaration to the top of the current scope.", "codeType": "javascript", "code": "hoistedFunction(); // Output: 'This function has been hoisted.'\n\nfunction hoistedFunction() {\n console.log('This function has been hoisted.');\n}", "image": "" }, { "slNo": "3", "heading": "Understanding Closures", "html": "", "code": "function outerFunction(outerVariable) {\n return function innerFunction(innerVariable) {\n console.log('Outer Variable: ' + outerVariable);\n console.log('Inner Variable: ' + innerVariable);\n };\n}\n\nconst newFunction = outerFunction('outside');\nnewFunction('inside');", "codeType": "javascript", "image": "" }, { "slNo": "4", "heading": "Visualizing Closures", "html": "", "code": "", "image": "./closures-visualization.png" } ], "conclusion": "In this post, we explored the concepts of hoisting and closures in JavaScript. By understanding these concepts, you can write more efficient and bug-free code. Hoisting allows variable and function declarations to be moved to the top of their scope, while closures enable functions to access variables from an outer function scope even after the outer function has closed.", "artifacts": ["https://developer.mozilla.org/en-US/docs/Glossary/Hoisting", "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Closures"] }, { "id": 2, "slug": "understanding-debouncing-in-javascript", "title": "Understanding Debouncing in JavaScript", "description": "A comprehensive guide to understanding Debouncing in JavaScript.", "introduction": "In this comprehensive guide, we will explore debouncing in JavaScript, understand its importance, and learn how to implement it effectively. Whether you are a beginner or an experienced developer, mastering debouncing can significantly improve your web performance.Debouncing is a programming practice used to ensure that a time-consuming task does not fire so often, improving performance and user experience. It's particularly useful in scenarios like window resizing, button clicking, or form input events, where multiple rapid events need to be controlled.", "date": "18-06-2024", "mainImage": "./deboucing.png", "tags": ["tech", "javascript", "deboucing", "webdev"], "readTime": "4 min read", "content": [ { "slNo": "1", "heading": "What is Debouncing?", "html": "Debouncing is a technique to limit the rate at which a function is executed. When multiple events are triggered in quick succession, the debounce function will ensure that only the last event in the series triggers the function execution after a specified delay.", "codeType": "", "code": "", "image": "" }, { "slNo": "2", "heading": "Why Use Debouncing?", "html": "

Performance Optimization: Prevents performance issues by reducing the number of times a function is called.
Enhanced User Experience: Avoids the clutter of repeated actions, providing a smoother experience.
Network Efficiency: Reduces unnecessary network requests when used with event handlers like input fields for live search.

Debouncing Example

An input field captures the user's input.
The fetchSuggestions function is debounced with a delay of 300 milliseconds.
As the user types, the debouncedFetchSuggestions function is called, ensuring that fetchSuggestions is only executed once the user stops typing for 300 milliseconds.

Optimized Rendering: The primary purpose of the key prop is to help React identify which items have changed, are added, or are removed. Without keys, React would have to re-render the entire list, which can be inefficient and lead to performance issues.
Maintaining Component State: Keys help maintain the state of components. When items in a list change, React uses the key to match the old item with the new item, preserving the state of each component.
Avoiding Reconciliation Issues: Without a proper key, React's reconciliation algorithm may not function as intended, leading to unexpected behaviors and bugs in your application.

{item.name}

([\n\t\t{ id: 1, task: 'Learn TypeScript' },\n\t\t{ id: 2, task: 'Practice React' },\n\t]);\n\n\tconst addTodo = (task: string) => {\n\t\tsetTodos([...todos, { id: todos.length + 1, task }]);\n\t};\n\n\treturn (\n\t\t

\n\t\t\t

{todo.task}

\n\t\t\t\n\t\t

\n\t);\n};\n\nexport default TodoList;", "image": "" }, { "slNo": "6", "heading": "Example 3: Using Index as a Key (Not Recommended)", "html": "While using the index as a key is technically possible, it is generally not recommended because it can lead to issues when the order of items changes.
React may misinterpret these changes, leading to inefficient updates and bugs.", "codeType": "javascript", "code": "import React from 'react';\n\ntype User = {\n\tname: string;\n};\n\nconst UserList: React.FC<{ users: User[] }> = ({ users }) => {\n\treturn (\n\t\t

{user.name}

\n\t);\n};\n\nexport default UserList;", "image": "" } ], "conclusion": "The key prop in React is essential for optimal rendering and maintaining component state in lists. By providing unique keys, developers ensure that React's reconciliation algorithm functions correctly, leading to efficient updates and a smooth user experience. Using TypeScript with React enhances the development process by adding type safety, making the code more robust and easier to maintain. Remember to always use stable, unique keys derived from your data, and avoid using indices whenever possible.", "artifacts": ["https://react.dev/learn/rendering-lists"] } ]

Why React Needs a Key Prop?

Understanding Debouncing in JavaScript

Understanding Hoisting and Closures in JavaScript