We do not know if our web application works 100% on different devices unless we observe them. I see a benefit of QuickSight to enable visualization of issues when many users face JavaScript errors and developers want to understand the issues in detail…

Cannot support custom domain of Cognito hosted UI with Amplify My app redirected to default URL of Cognito hosted UI when I specified custom domain in Cognito, deactivated default URL of Cognito hosted UI and call Auth.federatedSignIn() in my react app with Amplify. The bare minimum code to reproduce is…

Faced an issue to support multiple redirect URLs for Auth with Amplify I faced the below issue when I specified multiple redirect URLs and used .federatedSignInwith Amplify module in React app. The bare minimum code base to reproduce is here: import awsconfig from "./aws-exports"; Amplify.configure(awsconfig); Auth.federatedSignIn(); Which is known issue This is known issue and basically you need to specify a single URL…

GraphQL server usage in Japan As same as GraphQL community has been growing, The number of searches in Japan has been also increasing. I started using it a couple years ago and immediately felt a free from manual syncing work between backend APIs and frontend calls. But turned out not many web developers surrounding me…

I was looking for a way for my friend who had never tried programming to run a static server in her local as part of building a development environment without using a terminal. Then I built a GUI app - https://github.com/watilde/localhost-app Code first and fun What experience can be the best to start programming…

At the end of last year, I was looking for systematic learning materials to help people learn web technology through experiential learning, and Google recommended its “Mobile Web Specialist” certification. In January, I took the exam without giving it much thought and failed, even though I code JavaScript on a…

I was casting a sideways glance at the recent popularity of TypeScript aside and thinking that I would become the last person who continues writing JavaScript until today. I was writing a simple function with async/await like the below. function delay(msec, count) { return new Promise<number>(resolve => {…

I am neither a ramen maker nor a Dr. Ramen. I’m just a person who has eaten more ramen than average since I grew up in Tokyo, Japan. Several years have passed since I moved to Europe, I’ve visited nine countries so far and I usually go ramen when I…

I was watching a Japanese TV show called “Eigo de Shabera Night”. It’s a talk show and the main topic is about English. At the show, a professional simultaneous interpreter was participating as a guest. It was a very interesting topic that she spoke about the pain of the simultaneous…