Leveraging Angular interpolation with the "ngIf" directive

In my table, I have a specific requirement for the first column to change color based on a variable within my class. For instance, within my DisplayProject.ts class, there is a property named indexOfColor

DisplayProject.ts

export class DisplayProject implements OnInit {
  ngOnInit(): void {
  }

  project: Project;
  indexOfColor: number = 1; // could be 2 

  constructor () {
  }
}

DisplayProject.html

<table>
  <thead>
    <tr>
      <th>the project name</th>
      <th>the project date</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>project.name</td>
      <td>project.date</td>
    </tr>
  </tbody>
</table>

I aim to have the "the project name" column display in green when indexOfColor = 1 and blue when indexOfColor = 2

Any suggestions ?

Answer №1

Utilize the Angular ngStyle feature to apply specific styles based on dynamic variables.

<td [ngStyle]="{ 'text-decoration': isBold ? 'underline' : 'none' }">
  Task description
</td>

Answer №2

Module Component:

@Component({ selector: 'app-comp', ... })
export class DisplayProject {
  @Input() public projectInfo: Project;
  @Input() public colorIndex: 1 | 2 = 1; //can be 2
}

CSS Styling:

.default-color {
  color: green;
}
.blue {
  color: blue;
}

HTML Template:

<table>
  <thead>
    <tr>
     <th class="default-color" [ngClass]="{ blue: colorIndex === 2 }">
       the project title
     </th>
     <th>
       the project deadline
     </th>
    </tr>
  </thead>
  <tbody>
   <tr>
     <td>project.name</td>
     <td>project.date</td>
   </tr>
  </tbody>
</table>

Answer №3

To utilize the class attribute, you can follow these steps:

SCSS

.color-green {
  color: green;
}

.color-blue {
  color: blue;
}

Template:

<th [ngClass]="{
    'color-green': indexOfColor === 1
    'color-blue': indexOfColor === 2
    }">
    the project name
</th>

If you ever need to include another condition in the future, simply add a new line of code.

Answer №4

<th [style.background]="{ indexOfColor == 1 ? 'green' : {indexOfColor == 2 ? 'blue' :'black'}">
</th>

Quoted from Binding value to style

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