{"id":35181,"date":"2025-02-14T15:39:06","date_gmt":"2025-02-14T10:09:06","guid":{"rendered":"https:\/\/mobisoftinfotech.com\/resources\/?p=35181"},"modified":"2025-11-24T09:14:45","modified_gmt":"2025-11-24T03:44:45","slug":"angular-signals-architecture-best-practices","status":"publish","type":"post","link":"https:\/\/mobisoftinfotech.com\/resources\/blog\/angular-signals-architecture-best-practices","title":{"rendered":"Angular Signals Guide: Architectural Patterns and Best Practices for Using Signals in Angular Applications"},"content":{"rendered":"<p>In Angular, signals (as part of Reactive Programming) are used to manage state and handle events in an application, often with the help of libraries like RxJS. However, with the introduction of Angular Signals (a new experimental feature), Angular introduces a different approach to managing reactivity in a more declarative and fine-grained manner.<\/p>\n\n\n\n<p><a href=\"https:\/\/mobisoftinfotech.com\/resources\/blog\/angular-signals-architecture-best-practices\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What are Angular Signals?<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><noscript><img decoding=\"async\" width=\"855\" height=\"363\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/angular-signals-concept.png\" alt=\"Understanding Angular Signals Concept\" class=\"wp-image-35239\" title=\"Angular Signals Concept\"><\/noscript><img decoding=\"async\" width=\"855\" height=\"363\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20855%20363%22%3E%3C%2Fsvg%3E\" alt=\"Understanding Angular Signals Concept\" class=\"wp-image-35239 lazyload\" title=\"Angular Signals Concept\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/angular-signals-concept.png\"><\/figure>\n\n\n\n<p>Signals are used in Angular for state creation and management. A signal is a thin layer that encapsulates a value. Using Signal in Angular, we can construct reactive variables. Customers can read signals at any time; they don&#8217;t delay value. From simple to complicated, it may hold any value.<br><code>SetTimeout()<\/code>, Promises, and other asynchronous elements should not be added to Angular signals since they are strictly synchronous. Signals can be read-only or writable. By employing signals to monitor every state of our application, we make it possible for Angular to quickly determine which areas of the display require updating.<\/p>\n\n\n\n<p>The code this tutorial is available in this <a href=\"https:\/\/github.com\/mobisoftinfotech\/angular-signals-patterns-best-practices\" target=\"_blank\" rel=\"noreferrer noopener\">Github repository<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Creating Signal in Angular<\/strong><\/h2>\n\n\n\n<p>Signals are functions that allow us to obtain the updated value or update the value. Here&#8217;s how to create a signal:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><noscript><img decoding=\"async\" width=\"856\" height=\"180\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/creating-angular-signals.png\" alt=\"Creating Signals in Angular Applications\" class=\"wp-image-35240\" title=\"How to Create Signals in Angular\"><\/noscript><img decoding=\"async\" width=\"856\" height=\"180\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20856%20180%22%3E%3C%2Fsvg%3E\" alt=\"Creating Signals in Angular Applications\" class=\"wp-image-35240 lazyload\" title=\"How to Create Signals in Angular\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/creating-angular-signals.png\"><\/figure>\n\n\n\n<p>Here we have created a signal and assigned value 50 to it.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Reading Signal<\/strong><\/h2>\n\n\n\n<p>We can read a signal by calling it, as signals are functions, so you can call them as:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><noscript><img decoding=\"async\" width=\"856\" height=\"165\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/reading-angular-signals.png\" alt=\"Reading Signals in Angular\" class=\"wp-image-35242\" title=\"Reading Signals in Angular\"><\/noscript><img decoding=\"async\" width=\"856\" height=\"165\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20856%20165%22%3E%3C%2Fsvg%3E\" alt=\"Reading Signals in Angular\" class=\"wp-image-35242 lazyload\" title=\"Reading Signals in Angular\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/reading-angular-signals.png\"><\/figure>\n\n\n\n<p>On the browser\u2019s console, you can see the value which is held by the variable.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Writable Signal<\/strong><\/h2>\n\n\n\n<p>Angular knows when to update <code>getCalculatedValue<\/code> whenever we change a value. Here, the value is a writable signal while <code>getCalculatedValue<\/code> is readonly.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">&nbsp;<span class=\"hljs-keyword\">constructor<\/span>() {\n\n    <span class=\"hljs-keyword\">const<\/span> writableSignalEx: WritableSignal&lt;number&gt; = signal(<span class=\"hljs-number\">100<\/span>);\n\n    <span class=\"hljs-keyword\">const<\/span> getCalculatedValue: Signal&lt;number&gt; = computed(<span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> writableSignalEx() * <span class=\"hljs-number\">10<\/span>);\n\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Writable Signals: '<\/span> + getCalculatedValue());\n\n  }<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\"><strong>Setting Value to Signal<\/strong><\/h2>\n\n\n\n<p>We can set the value to a signal by the set method.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><noscript><img decoding=\"async\" width=\"856\" height=\"246\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/setting-values-to-angular-signals.png\" alt=\"Setting Value to Angular Signals\" class=\"wp-image-35243\" title=\"Setting Values to Signals in Angular\"><\/noscript><img decoding=\"async\" width=\"856\" height=\"246\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20856%20246%22%3E%3C%2Fsvg%3E\" alt=\"Setting Value to Angular Signals\" class=\"wp-image-35243 lazyload\" title=\"Setting Values to Signals in Angular\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/setting-values-to-angular-signals.png\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Updating Signal Value<\/strong><\/h2>\n\n\n\n<p>We can update signal values by calling the update method of the signal:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><noscript><img decoding=\"async\" width=\"856\" height=\"189\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/updating-angular-signal-value.png\" alt=\"Updating Angular Signal Value\" class=\"wp-image-35244\" title=\"How to Update Angular Signal Values\"><\/noscript><img decoding=\"async\" width=\"856\" height=\"189\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20856%20189%22%3E%3C%2Fsvg%3E\" alt=\"Updating Angular Signal Value\" class=\"wp-image-35244 lazyload\" title=\"How to Update Angular Signal Values\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/updating-angular-signal-value.png\"><\/figure>\n\n\n\n<p>Angular keeps track of where signals are read and when they are updated using this method. The framework updates the DOM with new state and performs other tasks using this information. Reactivity is the capacity to react to shifting signal values across time.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Using Equality Functions in Signal<\/strong><\/h2>\n\n\n\n<p>If the old and new values are the same, Signal does not check for new values when the equality function is used. Because it doesn&#8217;t cause any updates, the performance is cleaner.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><noscript><img decoding=\"async\" width=\"856\" height=\"126\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/using-equality-function-angular-signals.png\" alt=\"Using Equality Function with Angular Signals\" class=\"wp-image-35245\" title=\"Equality Function in Angular Signals\"><\/noscript><img decoding=\"async\" width=\"856\" height=\"126\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20856%20126%22%3E%3C%2Fsvg%3E\" alt=\"Using Equality Function with Angular Signals\" class=\"wp-image-35245 lazyload\" title=\"Equality Function in Angular Signals\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/using-equality-function-angular-signals.png\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What is computed() Expression and When to Use<\/strong><\/h2>\n\n\n\n<p>A computed signal is a signal that produces its value based on other signals.<br>Since they don&#8217;t write to signals, all <code>computed()<\/code> signals only return the result based on inputs; they don&#8217;t have any side effects. They become pure functions as a result. <code>Computed()<\/code> does not allow writing to signals, hence it makes them pure functions. It makes writing decorative code easier.<br>It&#8217;s important to note that computed signals are both lazy evaluated and memoized, meaning that they don&#8217;t update when you revisit components or refresh the page; instead, they provide a cached value of the same value. If the value is changed, it reads for the difference.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><noscript><img decoding=\"async\" width=\"856\" height=\"177\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/using-computed-expression-angular-signals.png\" alt=\"Using Computed Expression with Angular Signals\" class=\"wp-image-35246\" title=\"Computed Expression in Angular Signals\"><\/noscript><img decoding=\"async\" width=\"856\" height=\"177\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20856%20177%22%3E%3C%2Fsvg%3E\" alt=\"Using Computed Expression with Angular Signals\" class=\"wp-image-35246 lazyload\" title=\"Computed Expression in Angular Signals\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/using-computed-expression-angular-signals.png\"><\/figure>\n\n\n\n<p>We should consider the following points while using <code>computed()<\/code>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The signal that is computed is read-only. Because <code>computed()<\/code> is continually listening to fresh results, avoid making changes there. There will be a compiler error if you attempt to change a computed signal.<\/li>\n\n\n\n<li>Avoid using asynchronous calls in <code>calculated()<\/code> since it automatically updates the changes when signal reads change.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/mobisoftinfotech.com\/services\/hire-angular-developers?utm_source=blog_cta&#038;utm_campaign=angular-signals-architecture-best-practices-cta\"><noscript><img decoding=\"async\" width=\"855\" height=\"150\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/hire-expert-angular-developers-signal-apps.png\" alt=\"Hire Expert Angular Developers for Signal-Based Applications\" class=\"wp-image-35247\" title=\"Hire Expert Angular Developers\"><\/noscript><img decoding=\"async\" width=\"855\" height=\"150\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20855%20150%22%3E%3C%2Fsvg%3E\" alt=\"Hire Expert Angular Developers for Signal-Based Applications\" class=\"wp-image-35247 lazyload\" title=\"Hire Expert Angular Developers\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/hire-expert-angular-developers-signal-apps.png\"><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Making Use of the Signal and Computing Within Your Components<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><noscript><img decoding=\"async\" width=\"856\" height=\"496\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/using-signals-computed-in-angular-components.png\" alt=\"Using Signals and Computed in Angular Components\" class=\"wp-image-35248\" title=\"Signals and Computed in Angular Components\"><\/noscript><img decoding=\"async\" width=\"856\" height=\"496\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20856%20496%22%3E%3C%2Fsvg%3E\" alt=\"Using Signals and Computed in Angular Components\" class=\"wp-image-35248 lazyload\" title=\"Signals and Computed in Angular Components\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/using-signals-computed-in-angular-components.png\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Interaction with Templates<\/strong><\/h2>\n\n\n\n<p>Signal data that is modified in your component class is used by templates.<br>Double curly brackets can be used in your templates to obtain the signal value. In the event that signal values change, templates automatically update the values.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\">&nbsp;&nbsp;<span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">p<\/span>&gt;<\/span>Addition: {{getAddition()}}<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">p<\/span>&gt;<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Angular continuously checks for updated values and displays them on templates. Angular can get updated values by calling the <code>updateAddition()<\/code> function.<br>Angular allows dynamic values to be bound into DOM attributes or properties.<br>Such as:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\">&nbsp;&nbsp;<span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">button<\/span> &#091;<span class=\"hljs-attr\">disabled<\/span>]=<span class=\"hljs-string\">\"getAddition() &lt; 0\"<\/span> (<span class=\"hljs-attr\">click<\/span>)=<span class=\"hljs-string\">\"updateAddition()\"<\/span>&gt;<\/span>Update Addition<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">button<\/span>&gt;<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>OR<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\">&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">ul<\/span> &#091;<span class=\"hljs-attr\">attr.role<\/span>]=<span class=\"hljs-string\">\"updpateAddtion() &gt; 0\"<\/span>&gt;<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\"><strong>Using Signal with Control Flow <\/strong><strong>@if<\/strong><strong> and <\/strong><strong>@for<\/strong><\/h2>\n\n\n\n<p><strong>If<\/strong> and <strong>for<\/strong> blocks can be used to display condition-based DOM elements.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\">@if (getDetails()) {\n\n&nbsp;&nbsp; <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">p<\/span>&gt;<\/span>Using get details information here<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">p<\/span>&gt;<\/span>\n\n&nbsp;&nbsp;} @else {\n\n&nbsp;&nbsp; <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">p<\/span>&gt;<\/span>No information available yet<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">p<\/span>&gt;<\/span>\n\n&nbsp;&nbsp;}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\"><strong>What is effect() and When to Use<\/strong><\/h2>\n\n\n\n<p>Any procedure that occurs whenever one or more signal values change is called an effect. You can use the effect function to generate an effect. <code>Effect()<\/code> will be required more frequently with programming that is more imperative. We ought to attempt declarative code. Effects operate in a reactive environment, and any code you invoke within an effect will also operate in a reactive environment.<br>Every effect runs at least once. Any signal value reads are tracked when an effect is running. The impact repeats if any of these signal values change. While the change detection procedure is underway, effects always run asynchronously.<\/p>\n\n\n\n<p>While using <strong>effect()<\/strong>, we should keep in mind that:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>It will be easier to read and identify incorrect behavior if our function is smaller.<\/li>\n\n\n\n<li>In <code>untracked()<\/code>, add the remaining code after reading the signals.<\/li>\n\n\n\n<li>Logging data being displayed and when it changes, either for analytics or as a debugging tool.<\/li>\n\n\n\n<li>Adding custom DOM behavior that can&#8217;t be expressed with template syntax.<\/li>\n<\/ul>\n\n\n\n<p>Using the `effect()` API, you can respond to signal changes. It requires a callback function that runs each time the value of the signal changes. For ex:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">effect(<span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> {\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">const<\/span> min = <span class=\"hljs-keyword\">this<\/span>.getMin();\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">const<\/span> max = <span class=\"hljs-keyword\">this<\/span>.getMax();\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;untracked(<span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> {\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">if<\/span> (max &gt; min) {\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">`Maximum value is: <span class=\"hljs-subst\">${max}<\/span>`<\/span>);\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;});\n\n&nbsp;&nbsp;&nbsp;&nbsp;});<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>&nbsp;&nbsp;You can also assign the effect to a field :<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-keyword\">import<\/span> { Component, computed, Input, Signal, signal, WritableSignal } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'@angular\/core'<\/span>;\n\n@Component({\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-attr\">selector<\/span>: <span class=\"hljs-string\">'app-signal-basics'<\/span>,\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-attr\">templateUrl<\/span>: <span class=\"hljs-string\">'.\/signal-basics.component.html'<\/span>,\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-attr\">styleUrls<\/span>: &#091;<span class=\"hljs-string\">'.\/signal-basics.component.scss'<\/span>],\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-attr\">standalone<\/span>: <span class=\"hljs-literal\">true<\/span>\n\n})\n\n<span class=\"hljs-keyword\">export<\/span> <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">SignalBasicsComponent<\/span> <\/span>{\n\n&nbsp;&nbsp;currentAddition = signal(<span class=\"hljs-number\">50<\/span>);\n\n&nbsp;&nbsp;firstInput = signal(<span class=\"hljs-number\">5<\/span>);\n\n&nbsp;&nbsp;secondInput = signal(<span class=\"hljs-number\">50<\/span>);\n\n&nbsp;&nbsp;getAddition = computed(<span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> <span class=\"hljs-keyword\">this<\/span>.firstInput() + <span class=\"hljs-keyword\">this<\/span>.secondInput());\n\n&nbsp;&nbsp;<span class=\"hljs-keyword\">constructor<\/span>() {\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">const<\/span> writableSignalEx: WritableSignal&lt;number&gt; = signal(<span class=\"hljs-number\">100<\/span>);\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">const<\/span> getCalculatedValue: Signal&lt;number&gt; = computed(<span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> writableSignalEx() * <span class=\"hljs-number\">10<\/span>);\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Writable Signals: '<\/span> + getCalculatedValue());\n\n&nbsp;&nbsp;}\n\n&nbsp;&nbsp;ngOnInit() {\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Reading Signals: '<\/span> + <span class=\"hljs-keyword\">this<\/span>.currentAddition());\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">this<\/span>.currentAddition.set(<span class=\"hljs-number\">100<\/span>);\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Signals after set : '<\/span> + <span class=\"hljs-keyword\">this<\/span>.currentAddition());\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">this<\/span>.currentAddition.update(<span class=\"hljs-function\"><span class=\"hljs-params\">value<\/span> =&gt;<\/span> value + <span class=\"hljs-number\">900<\/span>);\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Signals after update : '<\/span> + <span class=\"hljs-keyword\">this<\/span>.currentAddition());\n\n&nbsp;&nbsp;}\n\n&nbsp;&nbsp;updateAddition() {\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">this<\/span>.firstInput.set(<span class=\"hljs-built_in\">Math<\/span>.floor(<span class=\"hljs-built_in\">Math<\/span>.random() * <span class=\"hljs-number\">100<\/span>) + <span class=\"hljs-number\">1<\/span>);\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">this<\/span>.secondInput.set(<span class=\"hljs-built_in\">Math<\/span>.floor(<span class=\"hljs-built_in\">Math<\/span>.random() * <span class=\"hljs-number\">100<\/span>) + <span class=\"hljs-number\">1<\/span>);\n\n&nbsp;&nbsp;}\n\n}\n\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h3 class=\"wp-block-heading\"><strong>Destroying effects:<\/strong><\/h3>\n\n\n\n<p>Remember that we should take care to remove these effects when they are no longer needed. Effects are automatically deleted when components are destroyed. By default, based on the circumstances, Angular will automatically clean up the effect function. When you create an effect inside a component, for instance, Angular will remove it when the component is removed. This also applies to directives and other code.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Clean up effects manually:&nbsp;<\/strong><\/h3>\n\n\n\n<p>The <code>onCleanup<\/code> function allows you to register a callback that is triggered either after the effect is removed or before the effect&#8217;s subsequent run starts.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><noscript><img decoding=\"async\" width=\"856\" height=\"382\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/using-effects-angular-signals.png\" alt=\"Using Effects with Angular Signals\" class=\"wp-image-35249\" title=\"How to Use Effects with Angular Signals\"><\/noscript><img decoding=\"async\" width=\"856\" height=\"382\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20856%20382%22%3E%3C%2Fsvg%3E\" alt=\"Using Effects with Angular Signals\" class=\"wp-image-35249 lazyload\" title=\"How to Use Effects with Angular Signals\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/using-effects-angular-signals.png\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Signals and Observables<\/strong><\/h2>\n\n\n\n<p>Like signal towers sending messages, observables have emitters that emit values.<br>Two methods are available if you need to read a signal in Observable&#8217;s <code>pipe()<\/code>:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Using a join operator, you can transform Signal into Observable so that your Observable can respond to changes in Signal.<\/li>\n\n\n\n<li>If you only require the current value and do not wish to respond to Signal or its variations, you can either <code>subscribe()<\/code> or read Signal directly in your operators. You don&#8217;t need <code>untracked()<\/code> in this case because observable is not a reactive context.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>The Best Practices to Adhere to When Utilizing Signals in Angular<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Example 1: Showing\/Hiding a DOM with Signals<\/strong><\/h3>\n\n\n\n<p>Signal is a useful tool for displaying or hiding different parts of the DOM based on API responses. Here&#8217;s an example of how to accomplish this:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-8\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">@Component({\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-attr\">selector<\/span>: <span class=\"hljs-string\">'get-details'<\/span>,\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-attr\">template<\/span>: <span class=\"hljs-string\">`\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;div *ngIf=\"!isGetDetails()\"&gt;\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/ No information available yet\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;\/div&gt;\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;div *ngIf=\"isGetDetails()\"&gt;\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/ Using get details information here\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;\/div&gt;\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;`<\/span>,\n\n&nbsp;&nbsp;&nbsp;&nbsp;})\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">export<\/span> <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">GetDetailsComponent<\/span> <\/span>{\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-attr\">getDetails<\/span>: WritableSignal&lt;boolean&gt; = signal(<span class=\"hljs-literal\">false<\/span>);\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ngOnInit() {\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">this<\/span>.getDetails();\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;getDetails() {\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">this<\/span>.myService.getDetailsAPI().subscribe(data) =&gt; {\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">this<\/span>.getDetails.set(<span class=\"hljs-literal\">true<\/span>);\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;});\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;isGetDetails() {\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-keyword\">this<\/span>.getDetails();\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}\n\n&nbsp;&nbsp;&nbsp;&nbsp;}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-8\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h3 class=\"wp-block-heading\"><strong>Example 2: Using Angular Signals to Count, Sort, and Filter Data<\/strong><\/h3>\n\n\n\n<p>In this example, we have developed a writable signal called books. It is made up of various values, like the book&#8217;s title, price, and availability. In order to obtain the filtered books based on their availability, a <code>computed()<\/code> signal was then built. Additionally, we have arranged the books by price.<\/p>\n\n\n\n<p>After that, Effects was introduced to record the modifications. The log will be printed inside the <strong>e<\/strong>ffects whenever we change the signal. The signal has been changed to update the logs.<\/p>\n\n\n\n<p>After then, the signals were changed by including a new object and by making changes to the old object to cause the event.<br>Filtering, sorting, and counting data according to different circumstances are examples of more complicated scenarios that can be handled by combining signals, computed signals, and effects.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-9\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-keyword\">import<\/span> { Component, computed, effect, signal, WritableSignal } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">\"@angular\/core\"<\/span>;\n@Component({\n\n&nbsp;&nbsp;<span class=\"hljs-attr\">selector<\/span>: <span class=\"hljs-string\">'app-signals-exercises'<\/span>,\n\n&nbsp;&nbsp;<span class=\"hljs-attr\">templateUrl<\/span>: <span class=\"hljs-string\">'.\/signals-exercises.component.html'<\/span>,\n\n&nbsp;&nbsp;<span class=\"hljs-attr\">styleUrls<\/span>: &#091;<span class=\"hljs-string\">'.\/signals-exercises.component.scss'<\/span>],\n\n&nbsp;&nbsp;<span class=\"hljs-attr\">standalone<\/span>: <span class=\"hljs-literal\">true<\/span>\n\n})\n\n<span class=\"hljs-keyword\">export<\/span> <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">SignalsExercisesComponent<\/span> <\/span>{\n\n&nbsp;&nbsp;<span class=\"hljs-attr\">books<\/span>: WritableSignal&lt;any&gt; = signal(&#091;\n\n&nbsp;&nbsp;&nbsp;&nbsp;{ <span class=\"hljs-attr\">price<\/span>: <span class=\"hljs-number\">1000<\/span>, <span class=\"hljs-attr\">title<\/span>: <span class=\"hljs-string\">'School Books'<\/span>, <span class=\"hljs-attr\">isAvailable<\/span>: <span class=\"hljs-literal\">true<\/span> },\n\n&nbsp;&nbsp;&nbsp;&nbsp;{ <span class=\"hljs-attr\">price<\/span>: <span class=\"hljs-number\">2000<\/span>, <span class=\"hljs-attr\">title<\/span>: <span class=\"hljs-string\">'Story Books'<\/span>, <span class=\"hljs-attr\">isAvailable<\/span>: <span class=\"hljs-literal\">false<\/span> },\n\n&nbsp;&nbsp;&nbsp;&nbsp;{ <span class=\"hljs-attr\">price<\/span>: <span class=\"hljs-number\">3000<\/span>, <span class=\"hljs-attr\">title<\/span>: <span class=\"hljs-string\">'Top Novels'<\/span>, <span class=\"hljs-attr\">isAvailable<\/span>: <span class=\"hljs-literal\">false<\/span> }\n\n&nbsp;&nbsp;]);\n\n&nbsp;&nbsp;<span class=\"hljs-comment\">\/\/ Computed signal based on the isAvailable flag to rank and filter prices<\/span>\n\n&nbsp;&nbsp;getAvailableBooksSortedByPrice = computed(<span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> {\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">const<\/span> filteredResult = <span class=\"hljs-keyword\">this<\/span>.books().filter(<span class=\"hljs-function\">(<span class=\"hljs-params\">book: { isAvailable: any; }<\/span>) =&gt;<\/span> book.isAvailable);\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">return<\/span> filteredResult.sort(<span class=\"hljs-function\">(<span class=\"hljs-params\">a: { price: number; }, b: { price: number; }<\/span>) =&gt;<\/span> a.price - b.price);\n\n&nbsp;&nbsp;});\n\n&nbsp;&nbsp;<span class=\"hljs-keyword\">constructor<\/span>() {\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-comment\">\/\/ Effect to record the filtered books and the number of books left<\/span>\n\n&nbsp;&nbsp;&nbsp;&nbsp;effect(<span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> {\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">`Available Books: `<\/span> + <span class=\"hljs-keyword\">this<\/span>.getAvailableBooksSortedByPrice().length);\n\n&nbsp;&nbsp;&nbsp;&nbsp;});\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">this<\/span>.updateBookElements();\n\n&nbsp;&nbsp;}\n\n&nbsp;&nbsp;updateBookElements() {\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-comment\">\/\/ Change the writable signals values.<\/span>\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">const<\/span> updatingElement = <span class=\"hljs-keyword\">this<\/span>.books();\n\n&nbsp;&nbsp;&nbsp;&nbsp;updatingElement&#091;<span class=\"hljs-number\">2<\/span>].isAvailable = <span class=\"hljs-literal\">true<\/span>;\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">this<\/span>.books.set(updatingElement);\n\n&nbsp;&nbsp;}\n\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-9\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h3 class=\"wp-block-heading\"><strong>Example 3: The Interaction Between Components Happens Reactively, Leveraging Angular\u2019s Signals System<\/strong><\/h3>\n\n\n\n<p><strong>Signal Declaration:<\/strong><br><code>counterSignal(0)<\/code> creates a reactive signal with an initial value of 0.<br>Signals are reactive, and any component subscribed to the signal will automatically update when the signal\u2019s value changes.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>ChildOneComponent:<\/strong><strong>&nbsp;<\/strong><\/h4>\n\n\n\n<p>The <code>increaseSignalCount<\/code> method increments the signal\u2019s value by 1 whenever the button is clicked.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>ChildTwoComponent:<\/strong><\/h4>\n\n\n\n<p>The <code>counterSignal()<\/code> method is used to retrieve the current value of the signal and display it in the template. This component will automatically re-render when the signal\u2019s value changes.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>ParentComponent:<\/strong><\/h4>\n\n\n\n<p>The signal is shared via input binding to both child components. When the signal is updated by <code>ChildOneComponent<\/code>, <code>ChildTwoComponent<\/code> will react to this change without the need for manual change detection or subscriptions.<\/p>\n\n\n\n<p>This component will be the parent, containing the signal and passing it to children.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-10\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-keyword\">import<\/span> { Component } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'@angular\/core'<\/span>;\n\n&nbsp;&nbsp;<span class=\"hljs-keyword\">import<\/span> { signal } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'@angular\/core\/signals'<\/span>;&nbsp; <span class=\"hljs-comment\">\/\/ Import signals from Angular<\/span>\n\n&nbsp;&nbsp;@Component({\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-attr\">selector<\/span>: <span class=\"hljs-string\">'app-root'<\/span>,\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-attr\">template<\/span>: <span class=\"hljs-string\">`\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;...\n\n&lt;hr&gt;\n\n&nbsp;&nbsp; &lt;div class=\"child-section\"&gt;\n\n&nbsp;&nbsp;&nbsp;&nbsp; &lt;app-child-one &#091;signal]=\"counterSignal\"&gt;&lt;\/app-child-one&gt;\n\n&nbsp;&nbsp;&nbsp;&nbsp; &lt;div class=\"child-divider\"&gt;&lt;\/div&gt;\n\n&nbsp;&nbsp;&nbsp;&nbsp; &lt;app-child-two &#091;signal]=\"counterSignal\"&gt;&lt;\/app-child-two&gt;\n\n&nbsp;&nbsp; &lt;\/div&gt;\n\n&nbsp;&nbsp;&nbsp;&nbsp;`<\/span>\n\n&nbsp;&nbsp;})\n\n&nbsp;&nbsp;<span class=\"hljs-keyword\">export<\/span> <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">ParentComponent<\/span> <\/span>{\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-comment\">\/\/ Creating a signal with an initial value<\/span>\n\n&nbsp;&nbsp;&nbsp;&nbsp;counterSignal = signal(<span class=\"hljs-number\">0<\/span>);\n\n&nbsp;&nbsp;}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-10\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In the <code>ParentComponent<\/code>, we declare a signal that holds an integer value. The signal is shared with both child-one and child-two components via input bindings.<\/p>\n\n\n\n<p>This component will modify the signal state by updating its value.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-11\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-keyword\">import<\/span> { Component, Input } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'@angular\/core'<\/span>;\n\n&nbsp;&nbsp;<span class=\"hljs-keyword\">import<\/span> { signal } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'@angular\/core\/signals'<\/span>;&nbsp; <span class=\"hljs-comment\">\/\/ Import signals<\/span>\n\n&nbsp;&nbsp;@Component({\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-attr\">selector<\/span>: <span class=\"hljs-string\">'app-child-one'<\/span>,\n\n&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-attr\">template<\/span>: <span class=\"hljs-string\">`\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;div class=\"child-1\"&gt;\n\n&nbsp;&nbsp;&nbsp;&nbsp; &lt;h3&gt;Child 1: Modify Signal&lt;\/h3&gt;\n\n&nbsp;&nbsp;&nbsp;&nbsp; &lt;button class=\"button1\" (click)=\"increaseSignalCount()\"&gt;Increase Signal&lt;\/button&gt;\n\n&nbsp;&nbsp; &nbsp; &lt;\/div&gt;\n\n&nbsp;&nbsp;&nbsp;&nbsp;`<\/span>\n\n&nbsp;&nbsp;})\n\n&nbsp;&nbsp;<span class=\"hljs-keyword\">export<\/span> <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">ChildOneComponent<\/span> <\/span>{\n\n&nbsp;&nbsp;&nbsp;&nbsp;@Input() counterSignal: ReturnType&lt;<span class=\"hljs-keyword\">typeof<\/span> signal&gt;;&nbsp; <span class=\"hljs-comment\">\/\/ Receive the signal from parent<\/span>\n\n&nbsp;&nbsp;&nbsp;&nbsp;increaseSignalCount() {\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-keyword\">this<\/span>.counterSignal.set(<span class=\"hljs-keyword\">this<\/span>.counterSignal() + <span class=\"hljs-number\">1<\/span>);&nbsp; <span class=\"hljs-comment\">\/\/ Increase signal value by 1<\/span>\n\n&nbsp;&nbsp;&nbsp;&nbsp;}\n\n&nbsp;&nbsp;}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-11\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In <code>ChildOneComponent<\/code>, we receive the signal from the parent as an input. The <code>increaseSignalCount()<\/code> method modifies the signal\u2019s state by increasing its value when the button is clicked.<\/p>\n\n\n\n<p><br>This component will react to the changes in the signal and update itself accordingly.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-12\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\">import { Component, Input } from '@angular\/core';\n\n&nbsp;&nbsp;import { signal } from '@angular\/core\/signals';\n\n&nbsp;&nbsp;@Component({\n\n&nbsp;&nbsp;&nbsp;&nbsp;selector: 'app-child-two',\n\n&nbsp;&nbsp;&nbsp;&nbsp;template: `\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">div<\/span> <span class=\"hljs-attr\">class<\/span>=<span class=\"hljs-string\">\"child-2\"<\/span>&gt;<\/span>\n\n&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">h3<\/span>&gt;<\/span>Child 2: Current Signal Value<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">h3<\/span>&gt;<\/span>\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">p<\/span>&gt;<\/span>Signal Value: {{ counterSignal() }}<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">p<\/span>&gt;<\/span>&nbsp; <span class=\"hljs-comment\">&lt;!-- Display signal value --&gt;<\/span>\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">div<\/span>&gt;<\/span>\n\n`\n\n&nbsp;&nbsp;})\n\n&nbsp;&nbsp;export class ChildTwoComponent {\n\n&nbsp;&nbsp;&nbsp;&nbsp;@Input() counterSignal: ReturnType<span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">typeof<\/span> <span class=\"hljs-attr\">signal<\/span>&gt;<\/span>;&nbsp; \/\/ Receive the signal from parent\n\n&nbsp;&nbsp;}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-12\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In <code>ChildTwoComponent<\/code>, we also receive the signal and directly use <code>counterSignal()<\/code> to retrieve its current value. The component will automatically re-render whenever the signal value changes.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><noscript><img decoding=\"async\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/angular-signal-example.gif\" alt=\"Example of Angular Signal in Action\" title=\"Angular Signal Example\"><\/noscript><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"Example of Angular Signal in Action\" title=\"Angular Signal Example\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/angular-signal-example.gif\" class=\" lazyload\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Summary<\/strong><\/h2>\n\n\n\n<p>Signals have the capacity to improve the effectiveness of identifying changes and updating content, as well as to handle complications that were previously difficult, is its most intriguing aspect. The idea of signals is not new and exclusive to Angular. In various frameworks, often with other names, they have existed for years.<br>It is evident that the signal serves as a container for the value we wish to monitor. While the compute function is being called, Angular is monitoring and noting the usage of other signals that it is aware of.<br>Signals make it simple to monitor modifications to application data. Because of the simplicity of the Signals API and the signal notion, a codebase that employs signals everywhere would still be easy to understand.<br>Using signals in Angular applications can lead to more declarative, fine-grained reactivity, improving both performance and readability. By adhering to best practices such as maintaining a single source of truth, signal composition, and optimizing change detection, developers can harness the power of signals for better state management and UI interactions. Signals, especially when used in combination with Angular&#8217;s features like lazy loading and services, offer a modern approach to building efficient, scalable applications.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/mobisoftinfotech.com\/contact-us?utm_source=blog&amp;utm_medium=referral&amp;utm_campaign=angular-signals-architecture-best-practices-cta2\"><noscript><img decoding=\"async\" width=\"855\" height=\"150\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/improve-angular-state-management-signals.png\" alt=\"Improve Angular State Management with Signals\" class=\"wp-image-35250\" title=\"Improve Angular State Management\"><\/noscript><img decoding=\"async\" width=\"855\" height=\"150\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20855%20150%22%3E%3C%2Fsvg%3E\" alt=\"Improve Angular State Management with Signals\" class=\"wp-image-35250 lazyload\" title=\"Improve Angular State Management\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/improve-angular-state-management-signals.png\"><\/a><\/figure>\n\n\n<div class=\"related-posts-section\"><h2>Related Posts<\/h2><ul class=\"related-posts-list\"><li><a href=\"https:\/\/mobisoftinfotech.com\/resources\/blog\/digital-mental-health-tools-are-revolutionizing-mental-health-care\">Digital Mental Health Tools Are Revolutionizing Mental Health Care<\/a><\/li><li><a href=\"https:\/\/mobisoftinfotech.com\/resources\/blog\/bike-taxi-app-development\">Bike Taxi App Development: Everything You Need To Know<\/a><\/li><li><a href=\"https:\/\/mobisoftinfotech.com\/resources\/blog\/customer-returns-management-embraces-technology\">How to Optimize Customer Returns Management with the Right Technology?<\/a><\/li><li><a href=\"https:\/\/mobisoftinfotech.com\/resources\/blog\/8-factors-to-consider-when-choosing-the-best-react-native-development-company\">8 Factors to Consider When Choosing the Right React Native Development Company<\/a><\/li><li><a href=\"https:\/\/mobisoftinfotech.com\/resources\/blog\/top-on-demand-food-delivery-platforms-across-globe\">List of Top On-Demand Food Delivery Startups Across the Globe<\/a><\/li><li><a href=\"https:\/\/mobisoftinfotech.com\/resources\/blog\/pitch-deck-examples-for-on-demand-startups\">20+ Pitch Deck Examples for On-Demand Startups<\/a><\/li><\/ul><\/div>\n\n\n<div class=\"modern-author-card\">\n    <div class=\"author-card-content\">\n        <div class=\"author-info-section\">\n            <div class=\"author-avatar\">\n                <noscript><img decoding=\"async\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/01\/Bharat.png\" alt=\"Bharat Kadam\"><\/noscript><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"Bharat Kadam\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/01\/Bharat.png\" class=\" lazyload\">\n            <\/div>\n            <div class=\"author-details\">\n                <h3 class=\"author-name\">Bharat Kadam<\/h3>\n                <p class=\"author-title\">Senior Software Engineer<\/p>\n                <a href=\"javascript:void(0);\" class=\"read-more-link read-more-btn\" onclick=\"toggleAuthorBio(this); return false;\">Read more <noscript><img decoding=\"async\" src=\"\/assets\/images\/blog\/Vector.png\" alt=\"expand\" class=\"read-more-arrow down-arrow\"><\/noscript><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"expand\" class=\"read-more-arrow down-arrow lazyload\" data-src=\"\/assets\/images\/blog\/Vector.png\"><\/a>\n                <div class=\"author-bio-expanded\">\n                    <p>Bharat Kadam has 8 years of experience as a senior software engineer at <a href=\"https:\/\/mobisoftinfotech.com\/\">Mobisoft Infotech<\/a> with a focus on Angular Frontend development. He is well-versed in Angular, React, Java and contemporary frontend\/backend technologies. He is constantly keen to keep ahead of industry trends, is committed to producing clear, maintainable code and resolving challenging issues in the constantly changing frontend\/backend environment.<\/p>\n                    <div class=\"author-social-links\"><div class=\"social-icon\"><a href=\"https:\/\/www.linkedin.com\/in\/bharat-kadam-24993692?utm_source=share\" target=\"_blank\" rel=\"nofollow noopener\"><i class=\"icon-sprite linkedin\"><\/i><\/a><\/div><\/div>\n                    <a href=\"javascript:void(0);\" class=\"read-more-link read-less-btn\" onclick=\"toggleAuthorBio(this); return false;\" style=\"display: none;\">Read less <noscript><img decoding=\"async\" src=\"\/assets\/images\/blog\/Vector.png\" alt=\"collapse\" class=\"read-more-arrow up-arrow\"><\/noscript><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"collapse\" class=\"read-more-arrow up-arrow lazyload\" data-src=\"\/assets\/images\/blog\/Vector.png\"><\/a>\n                <\/div>\n            <\/div>\n        <\/div>\n        <div class=\"share-section\">\n            <span class=\"share-label\">Share Article<\/span>\n            <div class=\"social-share-buttons\">\n                <a href=\"https:\/\/www.facebook.com\/sharer\/sharer.php?u=https%3A%2F%2Fmobisoftinfotech.com%2Fresources%2Fblog%2Fangular-signals-architecture-best-practices\" target=\"_blank\" class=\"share-btn facebook-share\"><i class=\"fa fa-facebook-f\"><\/i><\/a>\n                <a href=\"https:\/\/www.linkedin.com\/sharing\/share-offsite\/?url=https%3A%2F%2Fmobisoftinfotech.com%2Fresources%2Fblog%2Fangular-signals-architecture-best-practices\" target=\"_blank\" class=\"share-btn linkedin-share\"><i class=\"fa fa-linkedin\"><\/i><\/a>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Article\",\n  \"mainEntityOfPage\": {\n    \"@type\": \"WebPage\",\n    \"@id\": \"https:\/\/mobisoftinfotech.com\/resources\/blog\/angular-signals-architecture-best-practices\"\n  },\n  \"headline\": \"Angular Signals Guide: Architectural Patterns and Best Practices for Using Signals in Angular Applications\",\n  \"description\": \"Explore best practices and architectural patterns for using Angular Signals to improve app performance and state management.\",\n  \"image\": \"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/02\/angular-signals-guide-architectural-patterns.png\",\n  \"author\": {\n    \"@type\": \"Person\",\n    \"name\": \"Bharat Kadam\",\n    \"description\": \"Bharat Kadam has 8 years of experience as a senior software engineer at Mobisoft Infotech with a focus on Angular Frontend development. He is well-versed in Angular, React, Java and contemporary frontend\/backend technologies. He is constantly keen to keep ahead of industry trends, is committed to producing clear, maintainable code and resolving challenging issues in the constantly changing frontend\/backend environment.\"\n  },\n  \"publisher\": {\n    \"@type\": \"Organization\",\n    \"name\": \"Mobisoft Infotech\",\n    \"logo\": {\n      \"@type\": \"ImageObject\",\n      \"url\": \"https:\/\/mobisoftinfotech.com\/assets\/images\/mshomepage\/MI_Logo-white.svg\",\n      \"width\": 600,\n      \"height\": 60\n    }\n  },\n  \"datePublished\": \"2025-02-14\",\n  \"dateModified\": \"2025-02-14\"\n}\n<\/script>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Organization\",\n  \"name\": \"Mobisoft Infotech\",\n  \"url\": \"https:\/\/mobisoftinfotech.com\/\",\n  \"logo\": \"https:\/\/mobisoftinfotech.com\/assets\/images\/MI_Logo.svg\",\n  \"sameAs\": [\n    \"https:\/\/www.facebook.com\/pages\/Mobisoft-Infotech\/131035500270720\",\n    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