Unable to activate the 'Click' function in Angular/Typescript after selecting element with 'document.querySelector'

In my Angular 8 Project, there is an element on a page with a unique string attached to the attribute 'data-convo-id'.

This element has a click function that loads data based on the data attribute specified above. However, without direct access to this element, I need a way to locate it using 'document.querySelector()' and trigger a click event on it to execute the associated function.

I've attempted two different methods to achieve this, both of which have been unsuccessful. See below for details:

Method 1:

// Get the ID from the NgRx Store
const currentID = this.State$.currentId;

// Find the element on the page with the required data attribute and ID
const relevantElem: HTMLElement = document.querySelector(`[data-convo-id=${currentID}]`) as HTMLElement;

// Simulate a click on the element
relevantElem.click();

Method 2:

// Create a new HTML event
let event = document.createEvent("HTMLEvents");

// Initialize the event as a 'click'
event.initEvent("click", true, true);

// Retrieve the desired ID from the NgRx Store
const currentID = this.State$.currentId;

// Locate the element with the necessary data attribute and ID
const relevantElem: HTMLElement = document.querySelector(`[data-convo-id=${currentID}]`) as HTMLElement;

// Dispatch the click event on the element
relevantElem.dispatchEvent(event);

Here is the HTML representation of the element:

<p #el [attr.data-convo-id]="conversation.id" (click)="viewConversation(el)"><strong>VIEW</strong></p>

Unfortunately, in both cases mentioned above, the click events fail to trigger any action. Even after implementing a 'setTimeout' function with console logs to ensure adequate time delay, the clicks do not register.

There are no errors reported with the provided code snippets.

Answer №1

Avoid relying too heavily on the native JavaScript API when working with Angular.

Consider using this approach instead:

//Declare QueryList to get elements by reference in component class
@ViewChildren('el') elList: QueryList<ElementRef>;

//Use the following code snippet where needed in your application
this.elList.find(x => x.nativeElement.getAttribute('data-convo-id') == currentID).click();

Answer №2

Have you successfully located the desired element?

If so, make sure to include the following:

document.querySelector(/**/).addEventListener('click', callbackfn)

In your component, add the function:

callbackfn(event: Event): void { console.log(event); console.log(this); }

I included console.log(this) to illustrate that you are no longer working within the Angular component, meaning you must pass any necessary services or variables as part of the element like this:

const el = document.querySelector(/**/) as any;
el.router = this.router //add angular router, for example

Then, in your callback function, you can do something like this:

callbackfn(event: Event): void {
  event.preventDefault(); //if you don't want the click to propagate
  const target = event.currentTarget as any;
  const router = target.router as Router;
  //perform the action you desire with your service, such as Angular router
}

Answer №3

When using querySelector([data-convo-id=${currentID}]), it's important to note that simply using the custom data attribute may not be enough to fetch the DOM element. You also need to specify the corresponding tag name.

For example: document.querySelector(p[data-convo-id="${currentID}"])

You can find a working example in my code sandbox (app.component.ts) demonstration. I'm still learning Angular and experimenting with a static currentID, which is currently functioning successfully :-).

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