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Tutorials, guides and expert articles.

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Strict Property Initialization in TypeScript

In later versions of TypeScript there’s the concept of a Strict Class Property Initializer, or Definite Assignment Assertion.

Todd Motto

Todd Motto

Feb 28, 2023

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Static Properties and Methods in TypeScript

In this post you’ll learn about the static keyword in TypeScript classes so you can confidently use them on properties and methods.

Todd Motto

Todd Motto

Feb 27, 2023

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Readonly Mapped Type in TypeScript

In this post you’ll learn how and when to use the Readonly mapped type TypeScript.

Todd Motto

Todd Motto

Feb 26, 2023

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Custom Validators in Angular Reactive Forms

Reactive Forms are one of the best features of the Angular framework. But despite their built-in validators that handle a lot of use-cases, it’s li...

Todd Motto

Todd Motto

Feb 20, 2023

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Classes vs Interfaces in TypeScript

Classes and interfaces are powerful structures that facilitate not just object-oriented programming but also type-checking in TypeScript. A class i...

Todd Motto

Todd Motto

Feb 7, 2023

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Jest: toEqual or toStrictEqual? The difference.

When starting out with Jest Matchers for unit testing, it’s common to hear “should I use toEqual or toStrictEqual?”.

Todd Motto

Todd Motto

Jan 30, 2023

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Component events with EventEmitter and @​Output in Angular

Angular components are the fundamental building blocks of application architecture, when paired with a one-way dataflow practice.

Todd Motto

Todd Motto

Jan 17, 2023

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Typing Arrays in TypeScript

There are many ways in TypeScript to type a property as an array, or contains an array of “something”. These ways of declaring an array type includ...

Todd Motto

Todd Motto

Jan 12, 2023

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Angular Classes with NgClass

In this post you’ll learn how to use the NgClass directive in Angular to dynamically assign class names to elements or components.

Todd Motto

Todd Motto

Jan 1, 2023

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Understand the Entity Pattern in Angular for State Management

Prepare for the wonders of the ‘entity pattern’ in Angular.

Todd Motto

Todd Motto

Nov 24, 2022

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Custom Reactive Stores with BehaviorSubject

Over the years best practices for state management have solidified in Angular, and there are just so many choices.

Todd Motto

Todd Motto

Nov 23, 2022