Mar 18, 2022API-Gateway Lambda Authorizer with Simple-ResponseThe Overview of how it works In most cases, you want your API-Gateway routes protected in some ways. AWS offers a couple of ways to do so. In this post, I would like to share the simplest way to control access to your API Gateway for each route. It is using “Lambda Authorizer with Simple Response”. …Lambda Authorizer4 min readLambda Authorizer4 min read
Feb 25, 2022Simple code that implement countdown on React.On web or mobile application, you often encounter a countdown. The most frequent one is when the application asks a confirmation code sent to your phonenumber. It gives you a limited time for you to enter the code, starting its countdown from 60 to 0. In this blog, I would…Customhook2 min readCustomhook2 min read
Oct 6, 2021AWS API Gateway REST vs HTTPIf you are a full-stack developer and need some backend services like cloud server, database or file storage, you must have considered the Amazon Web Services API Gateway, also known as AWS API Gateway. I have used it for about 2 years on a daily basis. …Api Gateway Rest Vs Http5 min readApi Gateway Rest Vs Http5 min read
Aug 28, 2021Use your mobile camera full-screen on web-browser using ReactJS instead of mobile applicationWhat is this article about? I believe the world is better without mobile applications. Users do not need to download applications with its constant updates. Developers can avoid paying a substantial amout of commision to the giant corporations, Apple and Google. That meas the services would have been cheaper without the commision. Developers can save…Camera On Mobile Browser6 min readCamera On Mobile Browser6 min read
Aug 12, 2021[JavaScript]Replace elements in Array with one line of codeIn this post, I would like to share very simple way to replace an element or elements in an Array with JavaScript.Replace Element In Array3 min readReplace Element In Array3 min read
Aug 8, 2021useDropzone: custom hook that creates a dropzone in your react application!In this post, I would like to share my own custom hook that turns a DOM element into a dropzone where visitors can submit their file into your react application. The hook is less than 100 lines of code. It is very tiny and works fast. Before you read this…React Drag And Drop3 min readReact Drag And Drop3 min read
Aug 3, 2021Two Useful Utility Types in Typescript: “Partial” and “Pick”The Typescript documenation sets out a dozen of utility types. After using some of them, I was fasinated. They made my code much neater. I did not know even they are existing before. In case you are missing them like me 2 days ago, I will breifly introduce the concept…Typescript2 min readTypescript2 min read
May 17, 2021The easiest way to publish your React component to NPM with TypescriptIn this blog, I would like to share how I publish my own react components to Node Package Manager or NPM. There are many ways to achieve the same goal. I tried many of them. But I think this is the easiest and quickest one I ever found. Benefits of publishing your own react components to NPM. First of…Npm Publish5 min readNpm Publish5 min read
Apr 23, 2021Creating your own cryptocurrency is not that hard.Introduction As I see dozens of cryptocurrencies’ price up and down 24/7, I always wondered what kind of genius made them because I know the fact that the mathematics behind the blockchain technology is intimidatingly complex. Coins VS Tokens Let me make the terms clear first. Sometimes people use the terms “coins” and “tokens”…Create Erc20 Token8 min readCreate Erc20 Token8 min read
Mar 25, 2021How to validate a date in JavaScriptThis blog is about how to check if a string value in “yyyymmdd” format is valid date. The TypeScript code below is the function that I have created. The function returns true only if the date exists on the calendar. If you are reading this blog, you probably know…Validatedatejavascript1 min readValidatedatejavascript1 min read
