🩷 Difference Between Compute and Effect in Angular Signals

#angular #signals #computed #effect

Computed Signals: Derived Signal

Function: Computed signals represent values derived from other signals. Think of them as formulas that take existing signals as inputs and produce a new output value.
Creation: You define them using the computed function, specifying a derivation function that outlines how the computed value is calculated.
Benefits:
Lazy Evaluation: Computed signals are calculated only when their value is needed. This avoids unnecessary computations.
Memoization: Subsequent reads of the computed signal with the same dependencies return the cached value, improving performance.
Dependency Tracking: Angular automatically tracks which signals a computed signal depends on. When any of those signals change, the computed signal is automatically recalculated.

Effects: Actions Triggered by Signal Changes

Function: Effects are functions that execute in response to changes in signals. They typically perform side effects like logging, interacting with external APIs, or updating local storage.
Creation: You create effects using the effect function. This function can optionally accept a onCleanup function for managing long-running operations.
Benefits:
Reactivity: Effects automatically run whenever their dependent signals change, ensuring your application stays up-to-date.
Asynchronous Execution: Effects run asynchronously during change detection, preventing them from blocking the main thread.

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🩷 How to avoid subjects and middle services between different components

#angular #signals #inject #guide

On the first screen, we have a ParentComponent that passes data to a ChildComponent, which in turn passes the data to an InnerChildComponent. This is a simple example.

On the second screen, the example will help you to remove prop drilling from your Angular applications and make your code more maintainable and easier to understand.

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🖤🩷 Angular: Initialize SignalStore from Resolver

#angular #signals #resolver

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🌐 Signals communication between components

#angular #signals #guide

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🌐 💘 Lightweight NGRX signalStore with Angular. Complete guide

#angular #signals #signalStore #guide

What is NGRX signalStore?

NgRx SignalStore is a fully-featured state management solution that offers a robust way to manage application state. With its native support for Signals, it provides the ability to define stores in a clear and declarative manner. The simplicity and flexibility of SignalStore, coupled with its opinionated and extensible design, establish it as a versatile solution for effective state management in Angular.

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🩷 How to rewrite component inputs to signals correctly

#angular #signals

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🩶 Media query matcher in Angular with RxJS, signals and NgClass

#angular #signals #service #matchMedia

To achieve the desired outcome, I’ve opted for an approach that follows this pattern:

— Create a service with a `mediaQuery()` method, which returns an RxJS Observable containing information on whether a specific breakpoint is matched or not.

— Create a property inside the component class (in the example we will call it `isMobile`, since we have only one breakpoint) and bind it the the `mediaQuery()` method previously crafted, but also converting the Observable to a signal.

— Utilize the `NgClass` directive to dynamically apply a class based on the value of the `isMobile` property.

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