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Daily JavaScript Challenge #JS-170: Capitalize the First Letter of Each Word in a String
- Today's JavaScript challenge is to capitalize the first letter of each word in a string.
- Given a sentence, capitalize the first letter of each word separated by spaces.
- You can find more information on string manipulation in the provided documentation.
- Join the discussion on approaches, edge cases, and learnings from the challenge.
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Dev
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291
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How to Build a JavaScript Cookie Scraper for Compliance
- Cookie compliance is essential for websites to adhere to laws and regulations regarding the use of cookies, including third-party cookies.
- Cookie scanning tools use static and dynamic scanning techniques to detect cookies on a website.
- To build your own cookie scraper for compliance, you can use Node.js and Puppeteer to capture cookies on web pages.
- Additional features for the scraper include storing cookies, real-time scanning, and setting up alerts for compliance issues.
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Dev
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65
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Staying Ahead in JavaScript: What’s Trending in 2025
- TypeScript continues to rise in popularity due to its type safety and improved developer productivity.
- Frameworks like React and Vue are rapidly evolving, with features like React's Server Components and Vue 3's Composition API enabling cleaner and modular architectures in front-end development.
- Serverless architectures are on the rise, with platforms such as Vercel, Netlify, and AWS Lambda simplifying the deployment of scalable, event-driven applications without the need to manage infrastructure.
- Staying updated with these trends in JavaScript can help developers and tech decision makers in building better, faster, and more future-proof applications.
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Medium
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359
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Deep vs Shallow Copy Behavior in JavaScript
- When working with primitive types like numbers or strings, assigning a value results in a full copy being made in memory.
- In contrast, when dealing with objects and arrays in JavaScript, they are treated as references rather than copied entirely.
- Assigning an object or array to another variable copies the pointer to the data location, not the content itself.
- Shallow copies only copy the top layer, meaning inner objects remain shared if they are objects themselves.
- Tools like Object.assign and the spread syntax can be used to create shallow copies in JavaScript.
- Deep copies duplicate every nested object or array inside, ensuring no shared references are left.
- JSON.stringify and JSON.parse together can be used for simple deep copies, though not suitable for all data types.
- Issues may arise with shallow copies when internal objects are inadvertently shared, leading to unexpected behavior.
- JSON-based deep copying may lose data for functions, Date objects, Map, Set, BigInt, Symbol-keyed properties, or undefined values.
- Handling cyclic structures in copying requires special consideration to avoid infinite loops and data loss.
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Dev
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186
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Exploring Event Delegation in JavaScript
- Event delegation in JavaScript is a powerful technique that ensures event listeners work even on dynamically created or destroyed elements.
- Event delegation involves attaching event listeners to a common ancestor in the DOM and checking the event target during the event bubbling phase.
- It is recommended to use event delegation when dealing with dynamic content, to reduce memory usage, and to handle future DOM updates seamlessly.
- Using event delegation allows for event handling on elements that are dynamically added later, enhancing the functionality and efficiency of your code.
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Hackernoon
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JavaScript Just Became 10X faster Thanks to a New Game-changing Feature From Chrome
- Chrome's V8 team introduced Explicit Compile Hints, boosting JavaScript performance significantly without requiring code changes.
- Webflow's acquisition of GSAP made all premium plugins free, democratizing animation tools for developers.
- A JavaScript hack using Object.prototype.toString.call(value) solves string conversion challenges, handling various value types seamlessly.
- Updates include Deno 2.3 enabling app compilation into single files, Prisma 6.7 performance improvements, Electron 36 enhancements for Windows apps, Koa 3.0 lightweight web framework, and PGlite 0.3 allowing browser PostgreSQL database usage.
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Dev
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159
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🔁 1128. Number of Equivalent Domino Pairs – Explained with Code in C++, JavaScript, and Python
- The problem involves finding the number of equivalent pairs of dominoes in a given list.
- The solution involves normalizing the dominoes and using a hash map to efficiently count the pairs.
- The optimal solution is implemented in C++, JavaScript, and Python.
- The time complexity is O(n), and the space complexity is O(1) due to a fixed array size.
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9 Likes
Dev
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241
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Daily JavaScript Challenge #JS-169: Find the Missing Number in Consecutive Array
- Today's JavaScript coding challenge is to find the missing number in a consecutive array from 1 to n.
- Developers are encouraged to participate by forking the challenge, writing a solution, and testing it.
- Additional resources and documentation on arithmetic progression are provided for learning.
- Participants can join the discussion by sharing their approach, interesting edge cases, and learnings in the comments.
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Dev
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145
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🤪 7 JavaScript Tricks They Don’t Teach You in Bootcamp
- The article introduces 7 JavaScript tricks that are not typically taught in bootcamps.
- 1. Use short-circuit guards to avoid over-nesting and make logic flow clear and direct.
- 2. Object.fromEntries() simplifies creating objects from arrays and allows powerful object transforms.
- 3. Enforce sanity with assertion functions for faster debugging and catching assumptions early.
- 4. Destructuring with defaults avoids crashing or logging undefined values.
- 5. Named function expressions in callbacks improve stack traces, debugging, and documentation.
- 6. Freeze configs to prevent inadvertent changes and errors in team or large codebase settings.
- 7. Utilize Function .name and .toString() to debug unknown functions and monitor behaviors in callback-heavy apps.
- These tricks focus on writing code with more intent and efficiency rather than reducing code length.
- Readers are encouraged to share their own under-the-radar JavaScript tricks in the comments section.
- Additionally, the article highlights GitHub bundles for developers, offering curated repositories for faster project building.
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Medium
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59
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How Values Get Passed in JavaScript Functions
- In JavaScript, primitive values like numbers, strings, and booleans are copied when passed into functions.
- The function works with a copied version of the primitive, leaving the original value unchanged.
- Passing primitives to functions ensures that changes made inside the function do not affect the original value.
- JavaScript sets aside new memory space for copies of primitives during function calls.
- Primitives provide predictability as their values don't change unless intentionally reassigned.
- On the other hand, objects and arrays are passed by reference in JavaScript functions.
- When objects or arrays are passed, both the original variable and the function parameter share the same underlying object.
- Changes made to objects or arrays inside a function reflect outside because they operate on the same shared memory location.
- Passing objects or arrays into functions can lead to unexpected changes if not handled carefully.
- While passing by reference may introduce surprises, it also allows JavaScript to handle complex data structures efficiently.
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Dev
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Google Chrome feature makes JavaScript 10X faster, GSAP is now free, UNKNOWN JavaScript hack, and more
- Chrome's V8 team introduced a feature that boosts JavaScript performance significantly by allowing developers to control function compilation at startup with simple comments.
- Webflow acquired GSAP, making all premium plugins free and improving features like accessibility and dynamic theming.
- A JavaScript hack using Object.prototype.toString.call(value) is highlighted as a versatile solution for converting values to strings effectively, handling edge cases effortlessly.
- Updates include Deno 2.3 enabling single-file compilation, Prisma 6.7 shifting to TypeScript for speed, Electron 36 enhancements for Windows apps, Koa 3.0 as a lightweight web framework, and PGlite 0.3 bringing full PostgreSQL to browsers.
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Medium
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237
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Day 3 of 20: Teach JavaScript to Make Decisions — Master Conditions That Power Every App
- JavaScript conditions are essential for writing smart and responsive logic in code.
- Conditions are used for making choices in code, like displaying different messages to users or controlling game logic.
- JavaScript conditionals are great for basic checks, scenarios with clear true/false outcomes, multiple possible outcomes, concise conditional assignments, and comparing a single variable to many constants.
- Mastering JavaScript conditionals is key to developing applications that can make decisions based on different scenarios.
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Dev
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59
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Introducing Fetch PHP 3.0: JavaScript-like HTTP Requests for Modern PHP Applications
- Fetch PHP 3.0 has been released as a major update to the HTTP client library, offering features to PHP developers akin to JavaScript's fetch() API.
- The update includes true asynchronous support with a custom async engine for non-blocking code execution.
- Fetch PHP 3.0 also introduces an enhanced fluent API for easier request building with cleaner syntax.
- Advanced concurrency controls inspired by JavaScript's Promise API are now available in version 3.0.
- The library features an intelligent retry mechanism with exponential backoff for more resilient applications.
- Version 3.0 offers a comprehensive response object with methods for handling different content types.
- Performance improvements in Fetch PHP 3.0 focus on faster response times, lower memory usage, and better connection pooling.
- Upgrading from previous versions is straightforward for most users, with detailed migration instructions provided.
- Installation of Fetch PHP 3.0 is simple via Composer, and comprehensive documentation is available for guidance.
- The future of Fetch PHP aims at expanded middleware support, additional content type handlers, and enhanced caching mechanisms.
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3 Likes
Dev
1M
100
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🧾 Build Your Own Modern Resume Builder with HTML, Tailwind CSS & JavaScript
- A sleek, responsive Resume Builder has been created to help users craft professional resumes effortlessly, featuring 4 unique templates and a user-friendly interface.
- The Resume Builder incorporates HTML5, Tailwind CSS, and JavaScript for frontend development, html2pdf.js for PDF export, Google Fonts for typography, and is hosted on GitHub Pages.
- The motivation behind building this tool was to provide a simple, stylish, and open-source alternative to existing complex or paid resume builders, making it accessible for all users.
- Future plans for the Resume Builder include implementing dark mode, adding more templates, supporting multiple languages, integrating AI-powered resume suggestions, and developing backend functionality for save/edit options.
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Dev
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1.5k
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HTMX Best Practices: Building Responsive Web Apps Without JavaScript Frameworks
- HTMX is a library that enables interactive web applications without heavy JavaScript frameworks, simplifying the client-side code and enhancing user experience.
- Best practices for working with HTMX involve setting it up, structuring HTML, avoiding complex loops, optimizing performance, and handling errors gracefully.
- To start with HTMX, include the library script, then use attributes like hx-get and hx-post to define dynamic behaviors in HTML elements.
- Dynamic content rendering without for loops can be achieved by processing data server-side and returning HTML fragments to be displayed using HTMX.
- Optimizing performance with HTMX includes minimizing requests, implementing caching, and debouncing requests to improve app efficiency.
- HTMX simplifies error handling by allowing the specification of actions for different events like responseError, providing a graceful user experience.
- HTMX offers simple integration, improved performance with server-side rendering, and avoids the complexity of full client-side frameworks.
- However, HTMX may have limited interactivity compared to comprehensive JavaScript frameworks and requires careful server-side logic for dynamic content.
- By following HTMX best practices, developers can build modern, responsive web apps with minimal effort and clean, straightforward implementations.
- Handling dynamic content on the server side and sending HTML fragments directly to the client can maintain application cleanliness and support platforms like DEV.to.
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