https://eduardkrivanek.com/blog Tutorials, deep dives and notes on web development — Angular, RxJS, NestJS and Firebase. en https://eduardkrivanek.com/blog/45_exploiting-unvalidated-redirects-for-xss https://eduardkrivanek.com/blog/45_exploiting-unvalidated-redirects-for-xss Technical blogpost exploring how Exploiting Unvalidated Redirects for XSS works Sun, 21 Dec 2025 00:00:00 GMT https://eduardkrivanek.com/blog/44_web-components-in-angular-why-passing-inputs-breaks-on-navigation https://eduardkrivanek.com/blog/44_web-components-in-angular-why-passing-inputs-breaks-on-navigation Technical blogpost exploring how Web Components in Angular - Why Passing Inputs Breaks on Navigation works Sun, 21 Dec 2025 00:00:00 GMT https://eduardkrivanek.com/blog/43_angular-custom-matpaginator-styling https://eduardkrivanek.com/blog/43_angular-custom-matpaginator-styling Technical blogpost exploring how Angular - Custom MatPaginator Styling works Mon, 24 Nov 2025 00:00:00 GMT https://eduardkrivanek.com/blog/42_angular-ngfor-optimizations https://eduardkrivanek.com/blog/42_angular-ngfor-optimizations Technical blogpost exploring how Angular - For Loop Optimizations works Thu, 02 Oct 2025 00:00:00 GMT https://eduardkrivanek.com/blog/41_afterrendereffect-afternextrender-aftereveryrender-renderer https://eduardkrivanek.com/blog/41_afterrendereffect-afternextrender-aftereveryrender-renderer Technical blogpost exploring how afterRenderEffect, afterNextRender, afterEveryRender & Renderer2 works Tue, 16 Sep 2025 00:00:00 GMT https://eduardkrivanek.com/blog/40_senior-angular-interview-questions https://eduardkrivanek.com/blog/40_senior-angular-interview-questions Most of us spend our day-to-day work calling APIs, caching data, and displaying it to users. We do this for years, and it leads us to believe we've mastered frontend development, especially a framework like Angular. Sat, 19 Jul 2025 00:00:00 GMT https://eduardkrivanek.com/blog/39_the-need-of-failing https://eduardkrivanek.com/blog/39_the-need-of-failing I used to think the whole try-and-fail wording was just a catchy phrase people threw around to sound deep. Turns out it has some truth to it and the fail part is very real. Wed, 11 Jun 2025 00:00:00 GMT https://eduardkrivanek.com/blog/38_build-a-full-stack-application-with-analog-js https://eduardkrivanek.com/blog/38_build-a-full-stack-application-with-analog-js Step-by-step guide on how create a simple full stack application in AnalogJS to test out all its features Fri, 02 May 2025 00:00:00 GMT https://eduardkrivanek.com/blog/37_my-personal-take-on-signal-types-in-angular https://eduardkrivanek.com/blog/37_my-personal-take-on-signal-types-in-angular Personal opinion on signal use-cases, how I use them and what would be the RxJS equivalents Tue, 18 Mar 2025 00:00:00 GMT https://eduardkrivanek.com/blog/36_simple-user-event-tracker-in-angular https://eduardkrivanek.com/blog/36_simple-user-event-tracker-in-angular A practical example of a real life problem how to track user's interaction in a web app Mon, 17 Feb 2025 00:00:00 GMT https://eduardkrivanek.com/blog/35_custom-rxjs-operators https://eduardkrivanek.com/blog/35_custom-rxjs-operators A practical guide of creating custom rxjs operators Mon, 27 Jan 2025 00:00:00 GMT https://eduardkrivanek.com/blog/34_dynamic-service-injection-in-angular https://eduardkrivanek.com/blog/34_dynamic-service-injection-in-angular How to dynamically inject services in Angular Fri, 10 Jan 2025 00:00:00 GMT https://eduardkrivanek.com/blog/33_advanced-rxjs-operators-you-know-but-not-well-enough-pt2 https://eduardkrivanek.com/blog/33_advanced-rxjs-operators-you-know-but-not-well-enough-pt2 Advanced RxJs Operators You Know But Not Well Enough pt2 Fri, 12 Jan 2024 00:00:00 GMT https://eduardkrivanek.com/blog/32_create-a-custom-rxresouce-function https://eduardkrivanek.com/blog/32_create-a-custom-rxresouce-function Creating Custom Rxresource API in Angular Thu, 14 Nov 2024 00:00:00 GMT https://eduardkrivanek.com/blog/31_deep_dive_into_angular_pipes_implementation https://eduardkrivanek.com/blog/31_deep_dive_into_angular_pipes_implementation Dive Into Angular Pipes Implementation Fri, 11 Oct 2024 00:00:00 GMT https://eduardkrivanek.com/blog/30_angular-generic-in-memory-cache-service https://eduardkrivanek.com/blog/30_angular-generic-in-memory-cache-service When manage application state in you Angular projects, you create a service to handle a specific... Mon, 09 Sep 2024 00:00:00 GMT https://eduardkrivanek.com/blog/29_angular-state-management-how-to-keep-your-sanity https://eduardkrivanek.com/blog/29_angular-state-management-how-to-keep-your-sanity Building anything meaningful requires having a state management in your app. The question is, how... Thu, 01 Aug 2024 00:00:00 GMT https://eduardkrivanek.com/blog/28_advanced-rxjs-operators-you-know-but-not-well-enough https://eduardkrivanek.com/blog/28_advanced-rxjs-operators-you-know-but-not-well-enough I’ve been using Angular for more or less half a decade and recently I reviewed how many rxjs... Mon, 17 Jun 2024 00:00:00 GMT https://eduardkrivanek.com/blog/27_from-chaos-to-clarity-simplify-your-angular-code-with-declarative-programming https://eduardkrivanek.com/blog/27_from-chaos-to-clarity-simplify-your-angular-code-with-declarative-programming Not that long ago I bumped into an interesting problem. I wanted to implement a “search user”... Sun, 02 Jun 2024 00:00:00 GMT https://eduardkrivanek.com/blog/26_angular-clickable-component https://eduardkrivanek.com/blog/26_angular-clickable-component Working on one of my side projects I had an interesting problem. I wanted to implement accessibility... Fri, 19 Apr 2024 00:00:00 GMT https://eduardkrivanek.com/blog/25_deploy-frontend-firebase-app-to-google-play https://eduardkrivanek.com/blog/25_deploy-frontend-firebase-app-to-google-play Recently I have deployed one of my application into Google Play. I had a few problems so I thought... Sun, 04 Feb 2024 00:00:00 GMT https://eduardkrivanek.com/blog/24_angular-interview-implement-data-reload https://eduardkrivanek.com/blog/24_angular-interview-implement-data-reload When interviewing into Angular related jobs, one question I used to get asked, is “Demonstrate a... Wed, 31 Jan 2024 00:00:00 GMT https://eduardkrivanek.com/blog/23_angular-rxjs-catcherror-position-matter https://eduardkrivanek.com/blog/23_angular-rxjs-catcherror-position-matter Using rxjs you have many occurrences when you want to catch the errors from your streams, handle them... Fri, 29 Dec 2023 00:00:00 GMT https://eduardkrivanek.com/blog/22_angular-default-image-placeholder https://eduardkrivanek.com/blog/22_angular-default-image-placeholder Working on the frontend, most of the time you want to display images loaded from a CDN. The request... Sun, 12 Nov 2023 00:00:00 GMT https://eduardkrivanek.com/blog/21_deploy-angular-universal-to-firebase-cloud-functions https://eduardkrivanek.com/blog/21_deploy-angular-universal-to-firebase-cloud-functions ou’ve finally finished your first, releasable version of your Angular Universal application and you... Tue, 29 Aug 2023 00:00:00 GMT https://eduardkrivanek.com/blog/20_angular-ssr-cannot-read-properties-of-undefined-reading-corechartchartjs https://eduardkrivanek.com/blog/20_angular-ssr-cannot-read-properties-of-undefined-reading-corechartchartjs Are you still building your web application as an SPA? What is this, 2020? Nowadays, everybody is... Wed, 09 Aug 2023 00:00:00 GMT https://eduardkrivanek.com/blog/19_angular-matpaginator-custom-styling https://eduardkrivanek.com/blog/19_angular-matpaginator-custom-styling As a frontend developer you most likely had a task to display data in a table and as an Angular... Sun, 23 Jul 2023 00:00:00 GMT https://eduardkrivanek.com/blog/18_angular-interview-what-is-higher-order-observable https://eduardkrivanek.com/blog/18_angular-interview-what-is-higher-order-observable One of the most common questions in Angular interviews is “what is a Higher-Order Observable”?... Sun, 09 Jul 2023 00:00:00 GMT https://eduardkrivanek.com/blog/17_angular-infinite-scrolling https://eduardkrivanek.com/blog/17_angular-infinite-scrolling Rendering takes time. That is especially the case if you have to load large amounts of data from your... Thu, 06 Jul 2023 00:00:00 GMT https://eduardkrivanek.com/blog/16_why-am-i-switching-to-signals-in-angular https://eduardkrivanek.com/blog/16_why-am-i-switching-to-signals-in-angular Angular version 16 released a feature, that, I would say wasn’t really expected to come and shocked... Thu, 22 Jun 2023 00:00:00 GMT https://eduardkrivanek.com/blog/15_angular-injectiontoken-in-nx https://eduardkrivanek.com/blog/15_angular-injectiontoken-in-nx Recently I migrated one of my applications from a pure Angular project into NX monorepo and... Mon, 19 Jun 2023 00:00:00 GMT https://eduardkrivanek.com/blog/14_sharing-types-between-angular-and-firebase-functions-in-nx-monorepo https://eduardkrivanek.com/blog/14_sharing-types-between-angular-and-firebase-functions-in-nx-monorepo Recently I started to work on a new project and after a considerable amount of time spent choosing... Wed, 14 Jun 2023 00:00:00 GMT https://eduardkrivanek.com/blog/13_vuejs-watcheffect-vs-watch https://eduardkrivanek.com/blog/13_vuejs-watcheffect-vs-watch In Vue 3, there are two main ways to observe changes to reactive data: watch and watchEffect... Thu, 01 Jun 2023 00:00:00 GMT https://eduardkrivanek.com/blog/12_collection-of-vue-macros-in-vuejs https://eduardkrivanek.com/blog/12_collection-of-vue-macros-in-vuejs Many developers (myself included) were excited when Vue.js version 3.3 introduced several... Sun, 28 May 2023 00:00:00 GMT https://eduardkrivanek.com/blog/11_how_shareReplay_saved_my_angular_project https://eduardkrivanek.com/blog/11_how_shareReplay_saved_my_angular_project When I first started in Angular and saw the RxJS library, I was like: whut is this? After some crying... Fri, 26 May 2023 00:00:00 GMT https://eduardkrivanek.com/blog/10_vuejs-reactivity-system-ref-reactive-shallowref-shallowreactive https://eduardkrivanek.com/blog/10_vuejs-reactivity-system-ref-reactive-shallowref-shallowreactive Vue.js is a popular JavaScript framework that provides developers with various tools to create... Thu, 18 May 2023 00:00:00 GMT https://eduardkrivanek.com/blog/9_new-in-vuejs-33-two-way-binding-with-definemodel-macro https://eduardkrivanek.com/blog/9_new-in-vuejs-33-two-way-binding-with-definemodel-macro With the upcoming VueJS version 3.3 the community once again doesn’t disappoint and releases many... Sat, 13 May 2023 00:00:00 GMT https://eduardkrivanek.com/blog/8_5-tips-to-improve-angular-performance https://eduardkrivanek.com/blog/8_5-tips-to-improve-angular-performance As an Angular developer, you understand the importance of building high-performing web apps... Tue, 25 Apr 2023 00:00:00 GMT https://eduardkrivanek.com/blog/7_graphql-everything-you-need-to-know https://eduardkrivanek.com/blog/7_graphql-everything-you-need-to-know Are you thinking about designing a backend API? You probably already know about REST architecture.... Mon, 13 Mar 2023 00:00:00 GMT https://eduardkrivanek.com/blog/6_angular-apollo-client-apollo-cache-configuration https://eduardkrivanek.com/blog/6_angular-apollo-client-apollo-cache-configuration Apollo-client might be a go-to library for connecting a frontend application to a GraphQL server;... Mon, 02 Jan 2023 00:00:00 GMT https://eduardkrivanek.com/blog/5_angular-v15-directive-composition-api https://eduardkrivanek.com/blog/5_angular-v15-directive-composition-api One of the advantages of using the Angular ecosystem is that it never forgets about you. If Angular... Thu, 17 Nov 2022 00:00:00 GMT https://eduardkrivanek.com/blog/4_angular-apollo-client-getting-started-with-graphql-in-angular https://eduardkrivanek.com/blog/4_angular-apollo-client-getting-started-with-graphql-in-angular GraphQL servers are becoming more and more popular. Backend developers recognize the added value of... Mon, 14 Nov 2022 00:00:00 GMT https://eduardkrivanek.com/blog/3_creating-a-graphql-server-with-nestjs https://eduardkrivanek.com/blog/3_creating-a-graphql-server-with-nestjs When considering building a server-side application, you might be overwhelmed by the vast majority of... Mon, 24 Oct 2022 00:00:00 GMT https://eduardkrivanek.com/blog/2_how_to_get_started_with_pinia_in_vue https://eduardkrivanek.com/blog/2_how_to_get_started_with_pinia_in_vue You are starting your VueJs project and you get stuck on a question: how am I going to share data... Mon, 19 Sep 2022 00:00:00 GMT https://eduardkrivanek.com/blog/1_developer_preview_of_standalone_support_in_angular_elements https://eduardkrivanek.com/blog/1_developer_preview_of_standalone_support_in_angular_elements Have you seen it already? Angular version 14.2 is here with new features and improvements! One of the... Tue, 06 Sep 2022 00:00:00 GMT