Tag: javascript
Browse 90 practical software engineering resources tagged with "javascript". Discover code recipes, design patterns, documentation templates, and in-depth guides to help you build, deploy, and maintain production-ready solutions involving javascript.
JavaScript Fetch Retry Logic with Exponential Backoff
Retry failed HTTP requests in JavaScript with exponential backoff
Logging
How to implement structured, level-based logging across Python, JavaScript, and Java with what works for production observability.
Build Real-Time Notifications with WebSockets
Implement a real-time notification system using WebSockets and Redis pub/sub for broadcasting messages across clients.
Deep Clone Objects in JavaScript
How to create deep copies of JavaScript objects and arrays correctly, handling circular references, Dates, Maps, Sets, and custom classes.
Deep Clone Objects in JavaScript: Beyond JSON.parse
Compare deep clone strategies including JSON.parse, structuredClone, manual recursion, and library approaches for copying nested objects with circular references and special types
Diff JSON Objects
How to compare two JSON objects and find differences in Python, Java, and JavaScript.
Generate URL Slugs
How to generate clean, URL-friendly slugs from strings in multiple programming languages.
Merge JSON Files
How to merge multiple JSON files into a single object or array in Python, Java, and JavaScript.
Merge JSON Files in JavaScript
Combine multiple JSON files with conflict resolution strategies using Node.js.
Parse Command Line Arguments
How to parse command line arguments in Python, Java, and Node.js CLI applications.
Parse CSV Files
How to parse CSV files in Python, Java, and JavaScript with practical code examples.
Parse JSON
How to parse JSON strings into native data structures across multiple programming languages.
Parse Markdown Files
How to parse Markdown to HTML and extract structured data in Python, Java, and JavaScript.
Parse XML Files
How to parse XML documents in Python, Java, and JavaScript with practical code examples.
Prevent Race Conditions in JavaScript Async Code
Identify and fix race conditions in asynchronous JavaScript using proper sequencing, atomic operations, locks, and Promise patterns for predictable concurrent execution
Regular Expressions
How to use regular expressions for pattern matching, validation, and text extraction across Python, JavaScript, and Java.
Serialize and Deserialize Data
How to serialize and deserialize data in JSON, XML, and YAML across Python, Java, and JavaScript.
Truncate Text
How to truncate text with ellipsis and word boundaries in Python, Java, and JavaScript.
URL Encoding and Decoding
Master URL encoding in JavaScript and other languages with encodeURI, encodeURIComponent, plus-safe handling, RFC 3986 compliance, and decoding edge cases
Connect to Redis
How to connect to Redis and perform basic operations in Python, JavaScript, and Java.
JavaScript Drag and Drop File Upload with HTML5 API
Implement native HTML5 drag and drop file upload in JavaScript
Build Responsive Email Templates with MJML
Create cross-client responsive email templates using MJML markup, live Handlebars variables, and inline CSS for reliable rendering across Gmail, Outlook, and Apple Mail
JavaScript Clipboard Copy and Paste
Copy text to clipboard programmatically in JavaScript with fallback
Debounce and Throttle Functions in JavaScript
Control function execution rate with debounce and throttle. Covers leading/trailing edge, cancelable timers, and real-world use cases.
JavaScript Event Loop
Understand how the JavaScript event loop works internally and how to write non-blocking code.
JavaScript Infinite Scroll Pagination with
Implement scroll-based data loading in JavaScript with IntersectionObserver
JavaScript Service Worker Offline Caching for PWA
Cache assets for offline PWA support with Service Workers and Cache API
Server-Side Rendering
Improve performance and SEO with server-side rendering using Next.js, Nuxt, Astro, and other frameworks with hydration strategies.
Escape HTML Entities
How to escape HTML entities to prevent XSS attacks in Python, Java, and JavaScript.
Sanitize User Input
How to sanitize and validate user input in Python, Java, and JavaScript to prevent injection attacks.
Generate Test Data
How to generate realistic, deterministic test data with Faker, factory-boy, and type-aware generators for reliable test suites in Python, JavaScript, and Java.
Mock Network Requests with MSW
How to use Mock Service Worker (MSW) to intercept network requests in JavaScript tests and development, including REST and GraphQL mocking.
Vitest Snapshot Testing for React
How to use Vitest snapshot testing to catch unintended UI changes in React components, including inline snapshots and snapshot updating workflows.
Multi-Tenant Data Isolation Pattern
Isolate tenant data in shared infrastructure using row-level security, schema-per-tenant, or database-per-tenant strategies. A pattern for SaaS applications.
Pipes and Filters Pattern
Chain processing steps with independent filters connected by pipes. A pattern for data transformation pipelines where each step is reusable and composable.
Federated Identity Pattern
Delegate authentication to external identity providers. A pattern for integrating OAuth2, OIDC, SAML, and SSO across multiple services and organizations.
Voucher Pattern
Validate claims and delegate access using signed vouchers without exposing sensitive data. A security pattern for token-based authorization between services.
Abstract Factory Pattern
Create families of related objects without specifying concrete classes. A creational design pattern for consistent object families.
Adapter Pattern
Convert the interface of a class into another interface clients expect. A structural design pattern for interface compatibility.
Bridge Pattern
Decouple an abstraction from its implementation so both can vary independently. A structural design pattern for platform independence.
Builder Pattern
Construct complex objects step by step. A creational design pattern for readable, configurable object construction.
Cache-Aside Pattern
Load data into the cache on demand from the backing store. A caching pattern that gives the application full control over what and when to cache.
Chain of Responsibility Pattern
Pass requests along a chain of handlers until one handles it. A behavioral design pattern for decoupling senders and receivers.
Circuit Breaker Pattern
Prevent cascading failures by stopping requests to failing services. An architectural pattern for resilient distributed systems.
Command Pattern
Encapsulate a request as an object, letting you parameterize clients with queues, logs, and undoable operations. A behavioral design pattern.
Composite Pattern
Compose objects into tree structures to represent part-whole hierarchies. A structural design pattern for treating individual objects and compositions uniformly.
CQRS Pattern
Separate read and write operations into different models, optimizing each for their specific workload. A data pattern for scalable systems.
Decorator Pattern
Add new functionality to objects dynamically by wrapping them. A structural design pattern for flexible behavior extension.
Dependency Injection Pattern
Supply dependencies from outside rather than creating them internally. An architectural pattern for decoupled, testable code.
Event Sourcing Pattern
Store the state of an application as a sequence of events rather than storing only the current state. An architectural pattern for audit-friendly systems.
Factory Pattern
Create objects without specifying the exact class to instantiate. A creational design pattern for flexible object creation.
Flyweight Pattern
Share objects to support large numbers of fine-grained objects efficiently. A structural design pattern for memory optimization.
Interpreter Pattern
Define a representation for a language's grammar along with an interpreter that uses the representation to interpret sentences. A behavioral design pattern for mini-languages.
Iterator Pattern
Provide a way to access elements of a collection sequentially without exposing its underlying representation. A behavioral design pattern for traversal.
Mediator Pattern
Define an object that encapsulates how a set of objects interact. A behavioral design pattern for reducing chaotic dependencies.
Memento Pattern
Capture and restore an object's internal state without violating encapsulation. A behavioral design pattern for undo/redo.
Mixin Pattern
Add reusable behavior to classes without inheritance by composing methods from shared objects into a target class.
Module Pattern
Encapsulate private state and behavior inside a self-contained unit with a public API. A structural pattern for organizing code into reusable, scope-safe modules.
MVC Pattern
Separate application into Model, View, and Controller components. An architectural design pattern for organized, maintainable code.
Observer Pattern
Define a subscription mechanism to notify multiple objects about events. A behavioral design pattern for event-driven communication.
Prototype Pattern
Create new objects by copying existing ones. A creational design pattern for cloning and object duplication.
Proxy Pattern
Provide a surrogate or placeholder for another object to control access to it. A structural design pattern for access control, lazy loading, and logging.
Repository Pattern
Abstract data access logic behind a clean interface. An architectural design pattern for testable, maintainable data layers.
Retry Pattern
Retry an operation that has failed with transient errors, using configurable strategies like fixed delay, exponential backoff, or circuit breaker integration.
Saga Pattern
Manage distributed transactions across multiple services by chaining local transactions with compensating actions for rollbacks. A microservices pattern.
Singleton Pattern
Ensure a class has only one instance and provide global access to it. A creational design pattern for controlled object creation.
State Pattern
Allow an object to alter its behavior when its internal state changes. A behavioral design pattern for finite state machines.
Strategy Pattern
Define a family of algorithms, encapsulate each one, and make them interchangeable. A behavioral design pattern for flexible behavior selection.
Template Method Pattern
Define the skeleton of an algorithm in a base class, letting subclasses override specific steps without changing the algorithm's structure. A behavioral design pattern.
Timeout Pattern
Prevent operations from hanging indefinitely by enforcing a maximum execution time. A resilience pattern for predictable response times.
Visitor Pattern
Represent an operation to be performed on elements of an object structure without changing the classes of the elements. A behavioral design pattern.