Angular - Dynamically change the height of an input element based on its content's length

I'm looking to automatically adjust the height of my input text based on its content. I have a solution that works when the user is actively typing, triggering the (input) event and calling my adjustHeight function to update the input element's height using scrollHeight.

Check out the code example below:

<textarea #myLabel
       (input)="adjustHeight(myLabel)"
       [(ngModel)]="labelValue">
</textarea>


adjustHeight(element: HTMLElement) {
   element.style.height = "5px";
   element.style.height = (element.scrollHeight)+"px";
}

This method works perfectly while users are adding text, but doesn't adapt the textarea height when pre-filled with content from an API response due to the absence of an (input) event trigger.

I attempted to utilize the (ngModelChange) event but found it ineffective. Are there any other events I could bind to the input element for handling its height during rendering? Thank you in advance

Answer №1

example:

<textarea #myLabel
    [style.height]="setHeight(myLabel)" 
    [(ngModel)]="textValue">
</textarea>

javascript:

public setHeight(element: HTMLElement): string {
    return element.scrollHeight + 'px';
}

this method allows for dynamic style changes.

Answer №2

One suggestion is to begin by setting labelValue as an empty string '' when you first declare it, then proceed to assign its value as intended.

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