node Archives - Code Samples

Fix npm error code ERESOLVE

Joel Patrick Llosa — Sat, 10 Oct 2026 10:00:05 +0000

Have you encountered this error, npm error code ERESOLVE? Right, following the setup instructions in a node app project, it was time to run npm ci. Lo and behold, the npm error code ERESOLVE error staring right into my face. Feeling confident I ask GitHub Copilot to fix my npm error. Let me share this […]

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Shopify Function Extension Example

Joel Patrick Llosa — Sat, 03 Jan 2026 07:04:28 +0000

This blog builds upon my previous blog, Shopify Check UI Extension Example. Now that we got our Checkout Extensibility app running, it’s time to add another payment method. Why do we need to add another payment method? Surely, that’s common sense is the answer to that, right? Having more payment options will let your store […]

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Shopify Checkout UI Extension Example

Joel Patrick Llosa — Thu, 01 Jan 2026 06:49:11 +0000

As you might have already read on the Shopify website, checkout.liquid is deprecated and stores need to upgrade to Checkout Extensibility by August 13, 2024. So here is an example of how to build a Checkout UI extension. For this example, our requirement is going to be to provide a free item (e.g. t-shirt) on […]

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React FE Spring Boot Example

Joel Patrick Llosa — Fri, 05 Dec 2025 17:51:11 +0000

In this article we will demonstrate a React Front-End app served through Spring Boot’s embedded Tomcat. Why do it this way? We can serve a React app in different ways (e.g. Apache Web Server, Nginx, etc.). What is so special about serving a React app through Spring Boot’s Tomcat? There is nothing special. A reason […]

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Spring ResourceTransformer Example

Joel Patrick Llosa — Sun, 30 Nov 2025 07:20:46 +0000

Here’s an example of how to handle static web resources in Spring. Let us pretend that one of the business requirement of our Angular FE Spring Boot app is A/B testing. A/B testing is a method of comparing two versions of an app or webpage against each other to determine which one performs better. In […]

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Angular FE Spring Boot Example

Joel Patrick Llosa — Sat, 29 Nov 2025 05:45:13 +0000

In this article we will demonstrate an Angular Front-End app served through Spring Boot’s embedded Tomcat. Why do it this way? We can serve an Angular app in different ways (e.g. Apache Web Server, Nginx, etc.). What is so special about serving an Angular app through Spring Boot’s Tomcat? There is nothing special. A reason […]

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