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HTML5 - Basic Exercises, Practice, Solution

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65. How to define an option in a drop-down list?

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Option</title>
</head>
<body>
</body>
</html>

Try it in the following editor or see the solution.

a. How to specify that an option should be disabled?

b. How to specify a label for an option-group?

c. How to specify that an option should be pre-selected when the page loads?

d. How to specify the value to be sent to a server?

Previous: How to define a group of related options in a drop-down list?
Next: How to define the result of a calculation?

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HTML-CSS: Tips of the Day

Style not working for innerHTML in Angular:

This behavior you're getting is normal. The class added to innerHTML is ignored because by default the encapsulation is Emulated. Which means Angular prevents styles from intercepting inside and outside of the component. You should change the encapsulation to None in your component. This way, you'll be able to define classes wherever you want: inside styles or in a separate .css, .scss or .less style-sheet (it doesn't matter) and Angular will add them to the DOM automatically.

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

@Component({
  selector: 'example',
  styles: ['.demo {background-color: blue}'],
  template: '<div [innerHTML]="someHtmlCode"></div>',
  encapsulation: ViewEncapsulation.None,
})
export class Example {
  private someHtmlCode = '';

  constructor() {
    this.someHtmlCode = '<div class="demo"><b>This is my HTML.</b></div>';
  }
}

Ref: https://bit.ly/3Arnwx7

 

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