Front-End Developer

Front-End DeveloperHTMLHTML5Semantic MarkupHTML FormsAccessibilityCSSCSS3Box ModelSelectorsLayout and PositioningResponsive DesignJavaScriptECMAScript 6 (ES6)DOM ManipulationEvent HandlingAjax and Fetch APIJSONFront-End Frameworks and LibrariesReactAngularVue.jsBootstrapMaterial-UICSS Preprocessors and Build ToolsSass/SCSSLessCSS ModulesCSS-in-JS (e.g., styled-components)Task Runners (e.g., Grunt, Gulp)Module Bundlers (e.g., Webpack, Parcel)Version Control and CollaborationGit and GitHub/GitLab/BitbucketBranching and MergingPull Requests and Code ReviewsCollaboration WorkflowsResponsive Design and Mobile DevelopmentMedia QueriesMobile-First DesignResponsive Frameworks (e.g., Bootstrap)Progressive Web Apps (PWA)Mobile App Development (e.g., React Native)Web Performance OptimizationMinification and CompressionCachingImage OptimizationCode SplittingLazy LoadingWeb AccessibilityAccessibility Standards (e.g., WCAG)ARIA (Accessible Rich Internet Applications)Keyboard AccessibilityScreen Reader CompatibilityTesting with Assistive TechnologiesCross-Browser CompatibilityBrowser Rendering EnginesBrowser DevToolsCSS Vendor PrefixesPolyfills and Feature DetectionBrowser Testing and DebuggingUX/UI PrinciplesUser-Centered DesignWireframing and PrototypingTypography and Color TheoryUser Research and TestingInteraction DesignFront-End Performance MonitoringPerformance MetricsPerformance ProfilingWeb Performance Testing ToolsPerformance Optimization StrategiesJavaScript Frameworks and LibrariesjQueryD3.jsLodashAxiosMoment.jsBuild and DeploymentModule Bundlers (e.g., Webpack, Parcel)Task Runners (e.g., Grunt, Gulp)Static Site Generators (e.g., Jekyll, Hugo)Continuous Integration/Continuous Deployment (CI/CD)Deployment Platforms (e.g., Netlify, Vercel, Heroku)Web SecurityCross-Site Scripting (XSS) PreventionCross-Site Request Forgery (CSRF) PreventionContent Security Policy (CSP)HTTPS and SSL/TLSWeb Application Firewalls (WAF)JavaScript Testing and DebuggingUnit Testing (e.g., Jest, Mocha, Jasmine)End-to-End Testing (e.g., Cypress, Puppeteer)Debugging Tools (e.g., Chrome DevTools)Testing Methodologies (e.g., TDD, BDD)Test Automation and Continuous Testing