I am tetsing a template driven form in angular, just testing not validating it. I have read that it can be done using a viewChild property but it seems to not work for me.
I create a reference like this in my one of my forms label:
<label #ref id=.. class=...>
And now in my component I do this:
@ViewChild('ref') ref:ElementRef;
So, I suppose I created a valiable of type ElementRef that is viewChild of my input. So now I can use ref in my tests.
Inside my tests I do this:
let ref: HTMLElement: it(....=> { ref = fixture.debugElement.query(By.css('ref')).nativeElement; fixture.detectChanges(); expect(ref.innerHTML)toContain('Name');// or whatever } )
Now consider that the test, html and component files are separated from one another.
I still get errors of nativeElemnt property cannot be read. eventhough I have imported ElemntRef.
Is this the right way to access the DOM elemnts?? Or this viewChild doesnt make a referece to my label??
And again can I use the ID to access the form elements? What I have read they use a reference with #.
Thanks!!
For direct access to DOM in Angular you can make judicious use of ElementRef
However Direct access to DOM elements is not a good practice because it leaves you vulnerable to XSS attacks.
import {Component, ElementRef} from '@angular/core';
@Component({
selector: 'my-app'
})
export class AppComponent implements ngOnInit {
constructor(private _elementRef : ElementRef) { }
ngOnInit(): void
{
this.ModifyDOMElement();
}
ModifyDOMElement() : void
{
//Do whatever you wish with the DOM element.
let domElement = this._elementRef.nativeElement.querySelector(`#someID`);
}
}
<p id="someID"></p>
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