"Within Angular 2+, the attribute referenced is not recognized as a valid property, even though it is explicitly defined within the @Input

Question

"Within Angular 2+, the attribute referenced is not recognized as a valid property, even though it is explicitly defined within the @Input

The main goal here is to increase the vertical pixel count.

<spacer [height]="200"></spacer>

Initially facing an issue where an error message states that height is not a recognized attribute of spacer. To address this problem, I set up the following code:

<div [ngStyle]="{'padding': 'getHeight()'}">
   &nbsp;
</div>

import {Component, Input} from '@angular/core';

@Component({
  selector: 'spacer',
  templateUrl: './spacer.component.html',
  styleUrls: ['./spacer.component.scss']
})
export class SpacerComponent  {
   @Input() height = '';
   constructor() { }

   getHeight() {
      return this.height;
   }
}

Does this mean that height is indeed a property? Additionally, I am looking to append 'px' to the height but that seems to complicate matters further. Any assistance would be greatly appreciated.

Thank you, Yogi.

javascript html css angular properties

Answer 1

Answer №1

Height as an attribute is not valid in HTML. If you want to change the height in pixels, you should use a class or attribute binding to make the CSS dynamic. Additionally, be sure to include 'px' after the numerical value, like '200px', for example:

@Input() height="200px"; // It's better to set this inside the parent component
// HTML
// Using attribute binding
<div [attr.height]="height"></div>
// Or using interpolation
<div attr.height="{{ height }}"></div>

Moreover:

I believe there may be some confusion about the usage of @Input(). @Input() is not required for this task; it is typically used to retrieve template references or values from the parent component.

You can simply define the height in your .ts file, height = '200px', without using @Input(), and then implement the aforementioned code to pass that variable into your HTML. The @Input() decorator is only necessary if the height value is being passed from another component, serving as a means to communicate with another component, rather than directly impacting your HTML template.

Answer 2

Height as an attribute is not valid in HTML. If you want to change the height in pixels, you should use a class or attribute binding to make the CSS dynamic. Additionally, be sure to include 'px' after the numerical value, like '200px', for example:

@Input() height="200px"; // It's better to set this inside the parent component
// HTML
// Using attribute binding
<div [attr.height]="height"></div>
// Or using interpolation
<div attr.height="{{ height }}"></div>

Moreover:

I believe there may be some confusion about the usage of @Input(). @Input() is not required for this task; it is typically used to retrieve template references or values from the parent component.

You can simply define the height in your .ts file, height = '200px', without using @Input(), and then implement the aforementioned code to pass that variable into your HTML. The @Input() decorator is only necessary if the height value is being passed from another component, serving as a means to communicate with another component, rather than directly impacting your HTML template.

"Within Angular 2+, the attribute referenced is not recognized as a valid property, even though it is explicitly defined within the @Input

Answer №1

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