#angular #cdk #directives #dynamic
Use Case
This method can be used when you need to manipulate the DOM directly, often in scenarios where you are working with non-Angular libraries or need to integrate with existing DOM elements that are not part of Angular’s template system.
Pros
— Direct control over the DOM.
— Can be useful for integrating with non-Angular libraries or existing scripts that manipulate the DOM directly.
Cons
— Bypasses Angular’s change detection and lifecycle hooks.
— Can lead to issues with Angular’s dependency injection and component lifecycle management.
— Harder to maintain and debug.
Performance Impact
Potentially high impact due to bypassing Angular’s optimized change detection. Direct DOM manipulation can also lead to performance issues if not handled properly.
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📄 How to design user-friendly forms: Write clear labels
#guide
#guide
The labels should be simple and easy to understand so that the user can quickly see what information to put in each field. Use simple labels to explain simple fields and add as few words as possible for each label. Here’s an easy example: use the “Full Name” label instead of “My name is”.
#settimeout #setinterval #event_loop #requestAnimationFrame
Why setTimeout is Inaccurate? ❌
setTimeout and setInterval in JavaScript are based on the event loop and task queue. Their execution time may vary due to several factors:
Event Loop Mechanism:
JavaScript executes code within a single event loop. If earlier tasks take a long time or the task queue is busy, the timer callback will be delayed.
Task Queue Priority:
The priority of tasks in the task queue varies. User interaction events or rendering updates might have higher priority than setTimeout and setInterval, delaying their execution.
JavaScript Engine Limitations:
The JS engine normally imposes a minimum delay; for example, nested setTimeout calls usually have a minimum delay of 4 milliseconds.
System Performance and Load:
System performance and current load can also affect timer accuracy. High system load can further delay task execution.
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#angular #ssr #guide
What is Server-Side Rendering (SSR) ?
SSR is the process of rendering web pages on the server instead of in the browser. With SSR, the Angular application sends fully rendered HTML from the server to the client, instead of a set of JavaScript files that the browser needs to process to build the page.
Benefits of SSR for SEO
1 — Fast Initial Load: Server-rendered pages load faster, providing a better user experience.
2 — Improved Indexing: Search engines can index server-rendered content more effectively than client-rendered content.
3 — Enhanced Link Sharing: Links shared on social media display rich and informative previews.
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#angular #animations #ui_element
Example explanation:
Triggers (trigger):
parentTrigger: Defines animations for the parent element.
childTrigger: Defines animations for the child elements.
States (state):
parentTrigger: Has the states start and end.
childTrigger: Has the states visible and hidden.
Styles (style):
Defines final and intermediate styles for different states and transitions.
Transitions (transition):
Defines how the animation should occur between states.
Animate (animate):
Defines the duration and timing function of the animations.
Keyframes (keyframes):|
Used in the transition from visible to hidden in the child elements to create detailed intermediate animations.
Group (group):
Used in the transition from start to end in parentTrigger to animate multiple properties in parallel.
Sequence (sequence):
Used in the transition from end to start in parentTrigger to animate multiple properties in sequence.
Query (query):
Used in the transition from hidden to visible in childTrigger to select and animate child elements.
Stagger (stagger):
Used with query to apply a delay between the animations of the child elements, creating a cascading effect.
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📄 How to design user-friendly forms: Colours
#guide
#guide
Colours will not just make your form look better or more engaging, but they will also make it easier for the user to get through each section faster.
Different colours can be used for different purposes. As mentioned before, red is often used to indicate any errors on the form while light grey can used for any disabled fields that we are not allowed to change (see the example below). A soft tone can also be applied to the whole form background to help the user identify each empty field. You can then use prominent and contrasting colours to make users notice action buttons like “Proceed to payment”, “Submit” or “OK”.
#angular #standalone
One of the most anticipated features since the introduction of standalone components is the ability to detect whether a component or directive imported into a component is actually being used. In Angular v19, this need has finally been addressed with the addition of a diagnostic for unused standalone imports.
The unused import diagnostic is reported as a warning, giving developers a heads-up without blocking the build. This can be especially helpful during development, allowing teams to catch unused imports early in the process. If needed, the diagnostic behavior can be disabled using the unusedStandaloneImports option in the tsconfig.json.
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