Angular Typescript can't get dropdown value correctly for case branch

Angular Typescript can’t get dropdown value correctly for case branch

When working with Angular and TypeScript, you may encounter a situation where you need to retrieve the selected value from a dropdown and use it in a case branch. However, sometimes the value you get is not what you expect, leading to unexpected behavior in your code. In this blog post, we will explore the possible solutions to this problem.

Solution 1: Using ngModel

One way to get the dropdown value correctly is by using the ngModel directive provided by Angular. By binding the selected value to a variable in your component, you can access it easily in your case branch.

Here’s an example:

HTML:


TypeScript:
selectedValue: string;

// Example case branch
switch (this.selectedValue) {
  case 'option1':
    // Code for option 1
    break;
  case 'option2':
    // Code for option 2
    break;
  case 'option3':
    // Code for option 3
    break;
  default:
    // Code for default case
}

With this approach, the selected value will be correctly assigned to the selectedValue variable, and you can use it in your case branch without any issues.

Solution 2: Using event binding

If you prefer not to use ngModel, you can also get the dropdown value using event binding. By listening to the change event of the dropdown, you can retrieve the selected value and store it in a variable.

Here’s an example:

HTML:


TypeScript:
selectedValue: string;

onDropdownChange(value: string) {
  this.selectedValue = value;
}

// Example case branch
switch (this.selectedValue) {
  case 'option1':
    // Code for option 1
    break;
  case 'option2':
    // Code for option 2
    break;
  case 'option3':
    // Code for option 3
    break;
  default:
    // Code for default case
}

In this solution, the onDropdownChange function is called whenever the dropdown value changes. It assigns the selected value to the selectedValue variable, which can then be used in the case branch.

These are two possible solutions to the problem of getting the dropdown value correctly for a case branch in Angular TypeScript. Choose the one that best fits your needs and implement it in your code.

Happy coding!

Angular Typescript can’t get dropdown value correctly for case branch