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angular get dom element by class

angular get dom element by classangular get dom element by class

javascript document object model getElementsByClassName. There may be situations where you want to access a directive, child component, or a DOM element from a parent component class. var queryResult = element[0].querySelector('.multi-files'); var wrappedQueryResult = angular.element(queryResult); The HTML DOM getElementsByClassName () method is used for getting the collection of all the elements in the document having a given class name. <!DOCTYPE HTML>. Example of how to use angular elementRef in component ? Any changes in the view reflec the changes in the DOM elements defined in the component. The ElementRef is a class that can wrap around a specified DOM element to enhance the methods and properties of a native element. get element by class name how to delete dom; div element class name remove element; html delete element by class; remove by classname in js; Using the ElementRef to Find Class by Name in Angular ElementRef is a native DOM element object wrapper containing the nativeElement property. This will not work well with Web Workers or Universal, but Angular2 itself doesn't provide something platform-agnostic to query for elements. then i will use ngAfterViewInit () and ViewChild and get current div height and width. we will able to get element width and height in angular 6, angular 7, angular 8, angular 9 and angular 10 version. The Renderer2 class is a service that provides an abstraction for UI rendering manipulations. This method can be called on any individual element to have its . Here, Creating a basic example of angular get element width and height. I'll try to keep this tutorial pretty straightforward and include some . When we change the value of ngIf to true later, Angular adds the required DOM content but do not re-run the entire component. In other words, w HTMLCollection An HTMLCollection is an array-like collection (list) of HTML elements. But it doesn't actually test if it is properly displaying. To change the HTML attribute we need to use ElementRef that has the property nativeElement and using it we can change HTML attribute of an element in the DOM. Directives are an Angular construct to extend a behavior or the appearance of a DOM element in a specific way. It comes in the form of @ViewChild and @ViewChildren decorators. @ViewChild. Thank you for pointing it out. javascript get element by id and class. Of course, VanillaJS gives us options for DOM manipulation, select the element from DOM with 'document.querySelector' and add, delete, remove elements from DOM. The ElementRef is a class that can wrap around a specified DOM element to enhance the methods and properties of a native element. These directives provide the behavioral abilities to the DOM element. I have created a custom attribute directive that will change text color, background color and font size. javascript select all divs with class. Code Description. Angular Renderer2 Example. ViewChild is used to query one element from the DOM whereas for multiple elements we use ViewChildren. Because an Angular component interacts with the DOM as well as other components and visual pieces of your Angular applications. Then we use remove () method to remove that particular element. Introduction to JavaScript Get Element by Class. The d3.select () method can also be used to get an element with specified id as shown below. javascript find class in div. matches. Ways to identify an Angular Application/Website. javascript get element using id and class name. Renderer is pretty useful for common use cases, and also for complex DOM manipulation. Thanks to the Renderer2 service in Angular, you will be able to develop apps which can be rendered in various environments, even the ones that don't have DOM access. Introduction to JavaScript Get Element by Class. Component properties and logic maps directly into HTML attributes and the browser's event system. To target a specific element, you may need to use ViewChild . In this article, we are talking about ngClass in Angular only, not ng-class in angular.js.. Prerequisites - What is Property Binding? Renderer2 Angular ElementRef is a wrapper around a native DOM element (HTML element) object. Example 1: Here the element of class ('p') has been removed. There are predefined methods and functions provided to access HTML elements in javascript that are mentioned in the Document interface. The creation API parses the component looking for input properties, and defines corresponding attributes for the custom element. As you can see in the above example, d3.select ("#p2") selects <p> element whose id is p2 and makes it green using .style () method. This article will introduce you to Angular's ViewChild decorator. javascript by Carcraftz on Oct 17 2020 Comment . When ngIf is set to false on an element and we load the component, that entire element and its children will not be present in the DOM, so we will not be able to get its or any of its children reference inside the DOM. export class DemoComponent { constructor( private element: ElementRef, private renderer: Renderer2, ) { let el = this . This is the same for CSS classes. NgIf will hide/show HTML elements on the DOM. When an element is hidden by ngIf, instead of hiding it through CSS, Angular will actually remove it from the DOM element completely. in ngOnInit life-cycle hook.. ElementRef / @Attribute() vs @Input(). classList. We can't use Angular get element by id in Angular, but in regular JavaScript applications, we use a DOM selector like document.querySelector() or document.getElementById(), to get a reference to the DOM element. By defining an element as ElemementRef we access it as a nativeElement object. We can use it inside a component or in the custom directive. Using it is the recommended approach because it then makes it easier to develop apps that can be rendered in different environments. ElementRef in Angular. ; AfterViewInit — One of this Lifecycle hook is called after the Angular component initialized its view. Instead of creating an HTML element tree, Angular creates a DebugElement tree that wraps the native elements for the runtime platform. angular.io. In Angular applications, we can get direct access to any DOM element by using a special class called ElementRef. In this tutorial, we'll see an Angular 8 example of how to use the two decorators. Wraps a raw DOM element or HTML string as a jQuery element.. The only limitation of using @Input() decorator is that it's value is available only after component or directive is initialized, i.e. The creation API parses the component looking for input properties, and defines corresponding attributes for the custom element. A class test will only tell you how that specific class behaves. Angular 10/9 Example with ElementRef, ViewChild and AfterViewInit So, let's see simple example and i hope it can help you. This allows your jQuery code to have DOM elements to run against. Let's look at the major differences again: This article will deal with how to access and set class names to the DOM elements. Let's take the placeholder attribute of input as an example. This class is an abstraction. A class test will only tell you how that specific class behaves. The most powerful methods come from referencing the DOM element inside the class, but we started out learning about template reference variables and moved onto using class methods and . According to the API, we need to use setStyle like this: Worked as expected! At its core, it's just a function that executes as soon as Angular encounters it in . It returns all the given elements as a NodeList object. Because when it comes to DOM manipulation, Renderer2 is one of the most accurate methods we can use. In DOM, all HTML elements are defined as objects. In this use case, we need to change a CSS property, the color. ElementRef in Angular. DOM manipulation is responsible for modifying existing DOM elements and changing their current appearance or behavior. Definition and Usage The getElementsByClassName () method returns a collection of elements with a specified class name (s). you can easily work with DOM element in angular 10. sometime you need to add class, set value, get value from input, trigger click event on dom element at time this post will help you to do that. There are predefined methods and functions provided to access HTML elements in javascript that are mentioned in the Document interface. In javascript document.query.selector with id and class. If jQuery is not available, angular.element delegates to AngularJS's built-in subset of jQuery, called "jQuery lite" or jqLite. Angular 9 - How to select element (that is a formcontrol) from the DOM and add a CSS Class to it Published January 6, 2021 I am dynamically generating formcontrols in the .html file. Approach: Here first we select the element that we want to remove. It is used with ViewChild to get the HTML element from the component class. It contains the property nativeElement, which holds the reference to the underlying DOM object. classList. 3 Source: stackoverflow . Using nativeElement object we can access all DOM elements in Angular. Template reference — Reference to a particular DOM element. Angular relies on the DebugElement abstraction to work safely across all supported platforms. A custom element hosts an Angular component, providing a bridge between the data and logic defined in the component and standard DOM APIs. You can use ViewChild if you need to query one element from the DOM and ViewChildren for multiple elements.. We'll be using an online development IDE available from https . Method: 1 . It's simply a class that wraps native DOM elements in the browser and allows you to work with the DOM by providing the nativeElement object which exposes all the methods and properties of the native elements. The @ViewChild and @ViewChildren decorators in Angular provide a way to access and manipulate DOM elements, directives and components. That's where Angular component DOM tests come in. Using Renderer2 we can create an element, add a text node to it, append child element using the appendchild method., etc. Example 1: This example will use the $ ("selector").get (0): // Converting into javascript object. Angular get element by id. Angular official documentation on ElementRef is a wrapper around a native element inside of a View. Whenever we want to access and get an element present in the DOM of HTML in javascript, we can get the element either based on its id, class or name. You can access any element in the returned object using the index number. As some of you may know already, withMutationObserver , you can monitor DOM changes. Code Ref. Previous methods were searching the DOM. ; ElementRef — ElementRef is a class, which consists of all native DOM elements. It behaves very similarly to what ngClass used to do in AngularJS.. But it doesn't actually test if it is properly displaying. Install Retrieve HTML Elements from the Service using RxJS BehaviourSubject By design, Angular discourages manipulating HTML elements that are not directly related to a specific component or directive. Overview. Whenever we want to access and get an element present in the DOM of HTML in javascript, we can get the element either based on its id, class or name. The call to elem.querySelector(css) returns the first element for the given CSS selector.. The ViewChild decorator returns the first element that matches a given directive, component, or template reference selector. # Using ElementRef class in Angular Typescript colors of the above texts. The best website to find answers to your angularjs questions. var queryResult = element[0].querySelector('.multi-files'); var wrappedQueryResult = angular.element(queryResult); We can also attach and listen to events etc. So it's faster and also shorter to write. add ('myclass') Implementation detail: classList is not an array, but rather it is a collection of type DOMTokenList. There are a lot of ways to manipulate the DOM. Angular also abstracts DOM access and manipulation by providing interfaces and wrappers within components. It holds the reference to the DOM element and uses it to manipulate the DOM. This article is compatible with Angular 4 to Angular 12. ngClass is a directive in Angular that adds and removes CSS classes on an HTML element. These directives manipulate the DOM element by adding or removing elements based on condition. To test if an element is hidden/shown by ngIf, we simply need to test if we can query the element successfully or not. I admit that it may not seem like much to add a @ViewChild () annotation, and then add the # target on the form elements of one or two components. Here is a diagram that shows the state of the view and DOM after we remove the A component element from the DOM: And since all change detection operations, including ViewChildren run on a View, not the DOM, Angular detects one view corresponding to A component and reports the number 1, instead of 0 as expected. I would still like to submit this ticket as a feature request to add the ability to access the DOM element through the FormControl class. Pretty basic methods, all in all, this is a Javascript application. In other words, the result is the same as elem.querySelectorAll(css)[0], but the latter is looking for all elements and picking one, while elem.querySelector just looks for one. The directives comprise ng-bind, ng-model, ng-class, ng-repeat, ng-version, ng-click, etc. See also angular 2 / typescript : get hold of an element in the template As always, the returned collection is live, meaning that it always reflects the current state of the DOM tree rooted at the element on which the function was called.As new elements that match names are added to the subtree, they immediately appear in the collection. The NgClass directive in Angular is used to set a CSS class dynamically based on custom conditions. How to assign a CSS class in Angular using the [className] property bindingAngular, like other single page application frameworks, realy shines when it comes to data-binding. Before we explore the DOM abstractions, let's understand how we access these abstractions inside a component/directive class.Angular provides a mechanism called DOM queries. There are multiple ways to modify the DOM elements in angular. The getElementsByClassName () method returns an HTMLCollection. Attaching a component dynamically to the DOM with Angular can be tricky if you don't read extensively the documentation. The nativeElement property unwraps the DebugElement and returns the platform-specific element object. A custom element hosts an Angular component, providing a bridge between the data and logic defined in the component and standard DOM APIs. Configure Jasmine to behave the way you want. Because an Angular component interacts with the DOM as well as other components and visual pieces of your Angular applications. How to access DOM element in Angular @ViewChild and @ViewChildren To access and manipulate DOM elements, directives, and components in Angular, we have the @ViewChild and the @ViewChildren decorators. The following syntax to represents the getElementsByName () method: 1. let elements = document.getElementsByName (name); The getElementsByName () accepts a name which is the value of the name attribute of elements and returns it value. The angular.element() Function in AngularJS is used to initialize DOM element or HTML string as an jQuery element.If jQuery is available angular.element can be either used as an alias for jQuery function or it can be used as a function to wrap the element or string in Angular's jqlite.. Syntax: angular.element(element) Where element refers to the HTML DOM element or the string to be wrapped . ElementRef is simply use for work with native DOM element in angular 10 application. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. In this video, I will demo how to Get Element By ID in Angular Component=====You can see more detail and dow. Angular 9 - How to select element (that is a formcontrol) from the DOM and add a CSS Class to it Published January 6, 2021 I am dynamically generating formcontrols in the .html file. The angular elementRef gives direct access to DOM manipulation. We learned three ways to read type's value for oursmart-input component, how they're used in some built-in directives and limitations. Example 2: This example will illustrate the use of $ ("selector . We will be using Javascript against CSS to manipulate them. we will able to get element width and height in angular 6, angular 7, angular 8, angular 9, angular 10, angular 11, angular 12 and angular 13 version. how to get all elements with same class in javascript. jqLite is a tiny, API-compatible subset of jQuery that allows AngularJS to manipulate the DOM in a cross-browser . remove element by class . Select Element by Id. You may also need to modify other crucial parts of an application, such as components, directives, and other DOM elements. Angular provides us a ViewChild decorator method which helps us to access the particular dom nodes in the components. If we define an element as an ElementRef, we can access it as a nativeElement object. We can use it to manipulate the DOM. This in the end actually makes it easier to test. You may also call getElementsByClassName() on any element; it will return only elements which are descendants of the specified root element with the . That means, that the DOM is automatically updated, whenever the corresponding JavaScript object changes. We will see that the structure of the DOM gets changed but the structure of the view is intact. We can also use the NgClass directive to dynamically add and remove classes based on certain conditions on NgClass. Component properties and logic maps directly into HTML attributes and the browser's event system. We will discuss almost every method and choose the best among them. That's where Angular component DOM tests come in. We can also add or remove styles, HTML attributes, CSS Classes & properties, etc. Angular has a lot of built-in directives, we have structure directives like *ngIf, *ngFor, *ngSwitch . The getElementsByClassName () property is read-only. app.component.html <div> <input placeholder="Name" #myname /> <button (click)="handleFocus ()">Focus</button> <button (click)="resetName ()">Reset name</button> </div> remove ('myclass') You can add a new class to it by using the add method: element. This is the recommended approach because it then makes it easier to develop apps that can be rendered in environments that don't have DOM access, like on the server, in a web worker or on native mobile. Here the task is to remove a particular element from the DOM with the help of AngularJS. So, its a one way process. When you have a DOM element reference you can remove a class using the remove method: element. src/app/app.component.ts Instead of creating an HTML element tree, Angular creates a DebugElement tree that wraps the native elements for the runtime platform. In this example, i will take one div dom element and set it's width 200px and height 200px using css. DOM (Document Object Model) is a way of manipulating the document (HTML document). Table of Contents Output: As the reset () method is not available in jquery we have converted the jquery element into a javascript object or into raw DOM elements. querySelector. Summary. We use the ViewChild to get the ElementRef of an HTML element in the component class. "angular remove element by class name" Code Answer. The JavaScript getElementByName () is a dom method to allows you to select an element by its name. (FYI, MutationObserver also works in IE11) The key point of it is to fire a CustomEvent from inside a directive… @Viewchild/@Viewchildren — Select child or all children elements from the DOM. Angular ElementRef is a wrapper around a native element inside of a View. If you are new to Angular, check out this Angular CRUD article.. Angular NgClass. Mappinglink. Two things we have to understand first are property binding and interpolation in Angular. When called on the document object, the complete document is searched, including the root node. If jQuery is available, angular.element is an alias for the jQuery function. Angular NgClass is a built-in directive that allows you to set the CSS class dynamically for the DOM element. In this example, i will take one div dom element and set it's width 200px and height 200px using css. Let's see an example. The nativeElement property unwraps the DebugElement and returns the platform-specific element object. This approach is highly recommended for various reasons. javascript get all methods of class. when you click on get value button then we will get value using ElementRef id and when you click on the reset button then we will set the value using ElementRef id. Thus, you can select first matching element using d3.select () method. you can simply access all methods and properties of native elements. The properties that highlight or characterize a DOM element are encapsulated in a directive. Here, we will simply take one input text box field with two buttons call "get value" and "reset value". then i will use ngAfterViewInit () and ViewChild and get . The ElemementRef is a class which can wrap around a specified DOM element to enhance its properties and methods available on a native element. The Renderer2 class is an abstraction provided by Angular in the form of a service that allows to manipulate elements of your app without having to touch the DOM directly. It provides a layer of abstraction between the DOM element and the component code. Angular relies on the DebugElement abstraction to work safely across all supported platforms. Of app.component.html. Both ViewChild and ViewChildren are used to communicate between the components to access the data. They behave the same, only the former returns one reference, while the latter returns multiple references as a QueryList object. These all are javascript native DOM element methods. One important to note that the Angular Change Detection works with the View. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. How to get Angular 2 element through class name in Jasmine. Now, let's remove the span element from the DOM. If we define an element as an ElementRef, we can access it as a nativeElement object. The getElementsByClassName method of Document interface returns an array-like object of all child elements which have all of the given class name(s).. Prerequisites Lots of things to think about here when we want to dive into the DOM alongside Angular, just ensure if you need to touch the native DOM elements that you use the right approach via the Renderer2 class.. This article is compatible with Angular 4 to Angular 12. Similarly, if an existing element that doesn't match names has its set of classes adjusted so that it matches, it immediately . Mappinglink. And logic defined in the component looking for input properties, and other DOM elements defined in form! All, this is how we manipulate... < /a > Mappinglink el this! Ng-Model, ng-class, ng-repeat, ng-version, ng-click, etc we want to access the data logic. Css, JavaScript, Python, SQL, Java, and other DOM elements run... Angular 2 element through class name in Jasmine structure of the DOM gets changed but the structure of DOM! Dom whereas for multiple elements we use ViewChildren an htmlcollection is an array-like collection ( list ) of elements! Recommended approach because it then makes it easier to develop apps that wrap. A DebugElement tree that wraps the native elements for the runtime platform t actually test if define... The data and logic defined in the Document interface width and height example - angular get dom element by class... Ll try to keep this tutorial, we need to change a CSS property, the complete is... To true later, Angular adds the required DOM content but do not re-run the entire component parses component... Dom tests come in el = this have structure directives like *,... Within components gets changed but the structure of the view is intact also for complex DOM manipulation in! Returns all the given elements as a QueryList object use remove ( ) and ViewChild ViewChildren. To events etc: //www.educba.com/javascript-get-element-by-class/ '' > how to access and manipulation by providing interfaces and wrappers within components inside! Also for complex DOM manipulation properly in Angular and the browser & # x27 ; p & # ;. Native elements so it & # x27 ; s where Angular component its. Ng-Click, etc What is property Binding and interpolation in Angular by ngIf, ngFor! Object, the color or a DOM element we define an element as an example a jQuery element ViewChild @. Same, only the former returns one reference, while the angular get dom element by class multiple... Underlying DOM object, angular.element is an array-like collection ( list ) HTML... We use ViewChildren tree that wraps the native elements for the custom directive means, that the DOM element HTML... ) returns the first element that matches a given directive, component, providing a between... - HDTuto.com < /a > ways to manipulate the DOM interpolation in Angular so let... Angular official documentation on ElementRef is a JavaScript application ngIf, we #! @ input ( ) and ViewChild and ViewChildren are used to query element. Available, angular.element is an alias for the runtime platform use of $ ( #. In all, this is a class that can be called on the Document,!, Angular creates a DebugElement tree that wraps the native elements for the DOM is automatically updated, the. Article will deal with how to use setStyle like this: Worked as expected every method and choose the among... In angular get dom element by class want to remove use cases, and other DOM elements in! Ng-Class in angular.js.. Prerequisites - What is property Binding and interpolation in Angular - DigitalOcean < /a angular.io! Just a function that executes as soon as Angular encounters it in can first. Element references ( ElementRef ) in Angular placeholder attribute of input as an ElementRef, we can be... Nativeelement, which consists of all native DOM elements defined in the Document,... Structure directives like * ngIf, we can access any element in component. Allows your jQuery Code to have its has been removed has angular get dom element by class removed recommended approach because it makes! Directive that allows AngularJS to manipulate the DOM element and uses it to manipulate the DOM an ElementRef, renderer! And width private element: ElementRef, we are talking about ngClass in Angular <... Ngoninit life-cycle hook.. ElementRef / @ attribute ( ) method can also add remove! Enhance the methods and functions provided to access and manipulation by providing and. Ng-Class, ng-repeat, ng-version, ng-click, etc * ngSwitch allows your jQuery Code to DOM. ;! DOCTYPE HTML & gt ; let el = this > Mappinglink provide the behavioral to... Multiple references as a nativeElement object HTML elements the methods and functions to. It then makes it easier to test if it is used to DOM. Elementref of an application, such as components, directives, and defines corresponding attributes for custom. Like this: Worked as expected be situations where you want to access HTML in. Nodelist object and height example - HDTuto.com < /a > angular.io basic methods, all in all, is! > Angular get element width and height example - HDTuto.com < /a > Mappinglink called... Javascript, Python, SQL, Java, and also for complex DOM manipulation inside a or. Select first matching element using the appendchild method., etc complete Document is searched, including the node. Use ngAfterViewInit ( ) vs @ input ( ) Angular ngClass reference selector native. And listen to events etc and defines corresponding attributes for the custom element directive, component. Element tree, Angular creates a DebugElement tree that angular get dom element by class the native elements for the custom element an Angular initialized. While the latter returns multiple references as a NodeList object can simply access all DOM elements all. S event system elements we use ViewChildren to manipulate them query the element of class ( #. Angularjs to manipulate the DOM element from the angular get dom element by class element from a parent class! When we change the value of angular get dom element by class to true later, Angular the. Element through class name in Jasmine it holds the reference to the DOM elements to run.... Raw DOM element to enhance the methods and properties of a native element of HTML... Simple example and i hope it can help you as expected the behavioral abilities to the underlying object... To have DOM elements defined in the custom element hosts an Angular DOM. Event system, directives, and also for complex DOM manipulation properly in Angular structure the. It returns all the given elements as a nativeElement object we can query the element of (! Example 2: this example will illustrate the use of $ ( quot. Angular adds the required DOM content but do not re-run the entire component index number DOM element and it... A href= '' https: //dev.to/imsabodetocode/dom-manipulations-in-angular-1dh1 '' > HTML elements Angular < /a ElementRef. By ngIf, we need to modify the DOM element to enhance the and. Be situations where you want to remove that particular element form of @ ViewChild remove... Querylist object & # x27 ; s where Angular component, or reference... And many, many more value of ngIf to true later, Angular creates a DebugElement tree wraps... Css to manipulate the DOM directives, and also for complex DOM manipulation < href=. Allows you to set the CSS class dynamically for the jQuery function and ViewChild and ViewChildren used. Binding and interpolation in Angular - DEV Community < /a > ways to identify an 8! * ngFor, * ngFor, * ngSwitch we will be using JavaScript against CSS to the! Here the element that we want to access a directive or removing elements based on.... If jQuery is available, angular.element is an array-like collection ( list ) of HTML elements Angular < /a @!, ng-version, ng-click, etc element or HTML string as a nativeElement object we access! Html attributes and the browser & # x27 ; s event system, that the structure the. Nativeelement object we can access any element in the view is intact component properties and logic defined the. A href= '' https: //medium.com/weekly-webtips/how-to-do-dom-manipulation-properly-in-angular-e6fdb70a6e0e '' > DOM Manipulations in Angular Manipulations in Angular defines corresponding for! Multiple ways to manipulate them Angular only, not ng-class in angular.js.. Prerequisites - is!: //www.bigan.com/wp-content/mkfoicx/html-elements-angular '' > HTML elements Angular < /a > ways to manipulate the DOM changed! Is intact will change text color, background color and font size the... & gt ; ( list ) of HTML elements in JavaScript that are mentioned in the DOM,... Ngafterviewinit ( ) vs @ input ( ) and ViewChild and get current div height and width are about! Are multiple ways to identify an Angular 8 example of how to do DOM manipulation properly in.. Which consists of all native DOM elements defined in the custom element defined in the custom hosts. The CSS class dynamically for the runtime platform class names to the API, we need to modify other parts. Predefined methods and properties of native elements for the DOM elements in Angular will..., Python, SQL, Java, and also for complex DOM manipulation properly in Angular 4 Angular... Interpolation in Angular... < /a > angular.io the entire component native.!: //itnext.io/using-renderer2-in-angular-8f80da6756f8 '' > using Renderer2 we can also be used to query one element from the angular get dom element by class element encapsulated... Gives direct access to DOM manipulation properly in Angular that executes as soon as Angular encounters in. These directives manipulate the DOM elements angular.js.. Prerequisites - What is property and... @ Viewchild/ @ ViewChildren — select child or all children elements from the DOM your angular get dom element by class Code to have.. Get element by class | Accessing elements in... < /a > ways to identify Angular. Changes in the component looking for input properties, etc to manipulate them properly displaying to HTML... Predefined methods and properties of native elements on any individual element to enhance the and... Article, we have to understand first are property Binding and interpolation in Angular see an example with ViewChild get...

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