Utilizing interpolation in Angular to apply CSS styling to specific sections of a TypeScript variable

Question

Utilizing interpolation in Angular to apply CSS styling to specific sections of a TypeScript variable

Suppose I have a variable called data in the app.component.ts file of type :string.

In the app.component.html file, I am displaying the value of data on the UI using string interpolation like {{data}}.

My question is, how can I apply some css to specific letters within the data variable while displaying it in the UI?

For example:

app.component.ts

data: string = "stack overflow"

app.component.html

<p>{{data}}</p>

How can I highlight the background color of the word 'overflow' using css? I know that Pipes are used to modify values, but in this case, I need to apply css.

Additionally, another requirement is that initially, the value will be displayed on the browser, and the word to be highlighted will come from an input box.

css angular typescript string-interpolation

Answer 1

Answer №1

If you're looking to add some visual flair to your text, consider this option:

.ts

  addHighlight(sentence: string, wordToHighlight: string) {
      sentence = sentence.replace(wordToHighlight, 
          `<span style="background-color: #35a5f8;">${wordToHighlight}</span>`);
      return this.sanitizer.bypassSecurityTrustHtml(sentence);
  }

.html

  <p [innerHTML]="addHighlight('hello there', 'there')"></p>

Answer 2

If you're looking to add some visual flair to your text, consider this option:

.ts

  addHighlight(sentence: string, wordToHighlight: string) {
      sentence = sentence.replace(wordToHighlight, 
          `<span style="background-color: #35a5f8;">${wordToHighlight}</span>`);
      return this.sanitizer.bypassSecurityTrustHtml(sentence);
  }

.html

  <p [innerHTML]="addHighlight('hello there', 'there')"></p>

Answer 3

Answer №2

To separate a given word into individual <span> elements, one solution is to use a pipe:

@Pipe({
  name: 'letterByLetter'
})
export class LetterByLetter implements PipeTransform {
  transform(value: string): string {
    return value
      .split('')
      .map((letter) => {
        return `<span>${letter}</span>`;
      });
  }
}

In the component, you can utilize the pipe like this:

<div [innerHTML]="data | letterByLetter"></div>

. You can also choose to use DomSanitizer instead of innerHtml if preferred.

You have the flexibility to define the appearance of the span element by setting classes or styles directly.

Best of luck!

Answer 4

To separate a given word into individual <span> elements, one solution is to use a pipe:

@Pipe({
  name: 'letterByLetter'
})
export class LetterByLetter implements PipeTransform {
  transform(value: string): string {
    return value
      .split('')
      .map((letter) => {
        return `<span>${letter}</span>`;
      });
  }
}

In the component, you can utilize the pipe like this:

<div [innerHTML]="data | letterByLetter"></div>

. You can also choose to use DomSanitizer instead of innerHtml if preferred.

You have the flexibility to define the appearance of the span element by setting classes or styles directly.

Best of luck!

Utilizing interpolation in Angular to apply CSS styling to specific sections of a TypeScript variable

Answer №1

Answer №2

Similar questions

Unleashed Breakpoint Mystery in Ionic 5 Angular with VSCode

Printing without sufficient paper will result in an incomplete printout

What is the best way to set the keyframes CSS value for an element to 0%?

Tips for waiting for an observable loop

Tips for hiding the overflow scrollbar on Microsoft Chrome when there is no content to scroll

When working with data in Angular, make sure to use any[] instead of any in app.component.html and app.component.ts to avoid causing overload errors

Implementing the same concept yet yielding diverse variations?

One approach to enhance a function in Typescript involves encapsulating it within another function, while preserving

Troubleshooting the issue with a styled subcomponent in React using Styled Components

Steps to stop mat-spinner upon receiving Job Success/Failure Notification from the backend

The use of DIV tags allows the element to be displayed in an inline

Center the panel on the page and decrease its width using Bootstrap

The issue with making an HTTP POST request in Angular 2

Ensure that the textbox remains valid when the reset button is clicked in Bootstrap

Testing the functionality of NgRx effect through unit testing

The dropdown feature within a bootstrap button group is malfunctioning

Incorporate OpenLayers 4 into your Angular 5 application

Padding problem arises when you wrap an image with an anchor tag

Bootstrap 5 - Create a full-screen modal perfectly aligned with its parent element

When is the appropriate time to nest CSS class selectors within other class selector definitions?