Issues arise when trying to utilize the TypeScript function that sets the height within NgStyle

I created a unique shape and I need to determine its height using a TypeScript function. However, the ngStyle doesn't seem to be applying the height correctly.

HTML:

<div class = "shape" [ngStyle] = "{'height': DetermineShapeHeight()}" (click) = 'onSelect()'>

Function:

DetermineShapeHeight(): number {
  let ShapeHeight = ((this.Shape.size.Width * 2) +
    (this.Shape.size.Height)) * 3;

  if (ShapeHeight <= 100) {
    ShapeHeight = 100;
  }

  console.log(ShapeHeight);

  return ShapeHeight;
}

What could be causing this issue?

cssangulartypescriptecmascript-6single-page-application

Answer №1

CalculateHeight function simply returns a number. However, for height to function correctly, it requires the inclusion of a unit.

Give this line a shot.

< div class = "card" [ngStyle] = "{'height.px': CalculateHeight()}" (click) = 'onSelect()' >

Pay attention to the .px included in the code above. It will resolve the issue.

Alternatively, you can modify the CalculateHeight function to return a string with the height unit appended at the end. For instance, 400px.

Answer №2

Don't forget to include px units in your HTML code as shown below:

<div class="box" [ngStyle]="{'width': calculateWidth() + 'px'}" (click)="onSelect()">

Answer №3

It seems like the issue here is that no specific unit of measurement has been assigned to the height value. Is it "300 pixels", "300 eggs", or maybe "300 cars"? :P

To resolve this, make sure to return your result with a valid unit. One quick fix would be to simply add + 'px' to the end of your returned value:

CalculateHeight(): number {
  let CardHeight = ((this.Card.duration.Hours * 60) +
    (this.Card.duration.Minutes)) * 2;

  if (CardHeight <= 60) {
    CardHeight = 60;
  }

  console.log(CardHeight);

  return CardHeight + 'px';
}

Additionally, remember to update your HTML attribute from (click)='onSelect()' to (click)="onSelect()" as using double quotes instead of single quotes for attribute values is the recommended practice.

For more information, refer to the suggested style-rules, especially regarding HTML Quotation Marks.

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