A simple walk through how to use the browser MediaDevices for capturing picture from a webcam in Angular
Do you know you can use Observable for Angular Output?
Learn a few layout tricks you can implement in your codebase today, and be able to write entire swaths of layout with just a few lines of code.
The holiday session is coming. Let add a simple snow effect to your Angular application ❄️❄️❄️
We will write a custom directive to disable a reactive form control by passing a boolean flag on the template
My eight tutorial is to explain how to build a placeholder loading component
I never knew the slice method takes negative integers!
My seventh tutorial will focus on another kind of text editor - a rich text HTML editor
Use let k: keyof T and a for-in loop to iterate objects when you know exactly what the keys will be or Object.entries to iterate over the keys and values of any object.
Have you ever do console.log an object and wondering how can copy the object over?
Prefer async/await to raw Promise when possible. They produce more concise, straightforward code and eliminate whole classes of errors.
Should you use type or interface? For complex types, you have no choice: you need to use a type alias. But what about the simpler object types that can be represented either way? To answer this question, you should consider consistency and augmentation. Are you working in a codebase that consistently uses interface? Then stick with interface. Does it use type? Then use type.
My sixth tutorial will focus on another interesting feature - a markdown text editor
Consider applying type annotations to entire function expressions, rather than to their parameters and return type. If you're writing the same type signature repeatedly, factor out a function type.
My fifth tutorial will focus on one of the most interesting feature - drag and drop board
A quick trick to kill the process currently using a port on Windows - npx kill-port 4200
VSCode is one of the most popular code editors, skilled use of VSCode can greatly improve our programming efficiency. This post consisted of some tips I found very helpful when working with VSCode, which I hope will help you too.
My fourth tutorial will focus on the first custom UI element - editable textbox
My third tutorial will go further into the application state management with Akita
My second tutorial will walk you through how to build the application layout that has navigation, sidebar and content section
How to use top-level await in ES Modules without all of the crazy hack
There were quite a lot of changes between Phaser 2 and 3 but I like version 3 better. It made the code much more readable and structure
Struggling to write regex from scratch, checkout super-expressive, and a playground written by my friend @nartc
I made a retro Tetris game with Angular. The first game that I have ever built :)
I spent my spare time to build a cloned Jira app with Angular 9, Akita and ng-zorro in about two weeks time, including the weekend
You should know some basic Angular, TypeScript and git knowledge before starting
I spent my spare time to build a cloned Jira app with Angular 9, Akita and ng-zorro in about two weeks time, including the weekend.
I have just migrated Gatsby v1 to v2 on my client application, and it is a painful experience
This post give you a quick glance of TailwindCSS and how to use it with Angular. If you're reading this and you don't know what TailwindCSS is, where have you been?
Repost my killer answer on StackOverflow with more than 600 votes
Still use Github for most of the work, but Gitlab for my blog
In short, a closure is not the function that is returned in another function. A closure is a combination of a function bundled together (enclosed) with references to its surrounding state (the lexical environment). In other words, a closure gives you access to an outer function’s scope from an inner function
If you have multiple concrete classes that inherit from the same base class, or implement the same interface. You should consider using visitor pattern. It will save you from dozens of if-else block or switch/case and typecasting
A style guide on the standard format, spelling, and construction of commonly used words and phrases
Once you go black you never go back :)
Understand and prevent the most common memory leaks in Angular application - Subscription unsubscribe
Remember to clean up your Rx subscriptions. In my experience, this is by far the most common cause of memory leaks in Angular applications
The different when using value and ngValue on Angular form
The goal of the game is to have as short-lived branches as possible (i.e. integrate often) while keeping the common branches (dev/patch) as stable as possible
You could use an extension for VSCode for converting C# class to TypeScript class in a few seconds 🥰
I like the Redux concept. But not NgRx :)
Write a custom async validator to validate an input field with a backend API in Angular reactive form
Pluralization is a problem in its sphere. We need to always correctly define grammar in our apps based on the singular/plural value
Export data to Excel is very useful on the data list for nearly every web application. The export feature helps to download the data list in a table as a file format for offline use
Hoư to limit the number of simultaneous requests to 100, and queue up the rest
I prefer to use FormGroup to populate the list of checkbox. For checking at least one checkbox was selected, write a custom validator.
null and undefined are the root of all evil. It often leads to runtime errors. It is easy to write code that will throw Error at runtime.
To define the function callback type. You could declare an interface that has a call signature. Or define a new type
In the use case of search, we don't want to hit the server endpoint every time user presses a key, it should flood them with a storm of HTTP requests. Basically, we only want to hit it once the user has stopped typing after sometimes (for instance 300ms) instead of with every keystroke.
Not all the time we need to cast from JSON object to a class, but sometimes it is really helpful. Use class-transformer to transform JSON object to class instance
Freeze screen in Chrome debugger / DevTools panel for inspect element that will disappear on hover/click
Run the setTimeout to trigger debugger before the element disappearing 🤓
How to use ng-template to render view recursive in Angular
Another interesting tree traverse problem that could land you a job 🤓
Use npm outdated to check and upgrade package accordingly
Vertically center in CSS has never been an easy problem
Using momentjs parseZone functionality for that purpose
We, programmers are also human and we will make mistakes, the best thing we can do is try not to repeat them. Doing pair programing and code review helped us a lot to spot and prevent the problem before we ended up it on production. The collaboration is the key to success
I found that source-map-explorer tool shows an easy-to-understand-and-explore visualization to help you debug where all the code is coming from.
Debounce and throttle are two techniques to control how many times we allow a function to be executed over time
Just read an interesting problem this morning. It seems not to be difficult
I will summarize the steps needed to integrate Angular 2 and Webpack build process in an MVC 5 application
There are only two hard things in Computer Science: cache invalidation and naming things
In this tutorial, I will show you how to create an animated fixed navigation that will resize on scroll and when you scroll down the page a bit, the header resizes smaller, and gets back bigger when you scroll back to the top with just simple CSS3 animation and jQuery
ES2015/ES6 has been around for more than two years with all the exciting feature and syntax. After working with TypeScript and Angular 2 in a project for more than a year, there are the features that I often apply in my code.
Hello people 👋