How to Create a Dropdown Filter with a Confirmation Button in Angular

Описание: Learn how to easily filter records in an Angular table using a dropdown and a confirmation button, enhancing user interaction and precision.
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How to Create a Dropdown Filter with a Confirmation Button in Angular

In web development, particularly when working with data tables, filtering records effectively is crucial for providing a positive user experience. One common implementation is using a dropdown list for filtering, but what if you want to add a confirmation button to this feature? This guide will guide you through modifying your existing Angular code to achieve exactly that.

Understanding the Problem

You might already have a simple filtering mechanism where changing the dropdown updates the records displayed in your HTML table. In this case, the filtering works seamlessly. However, adding a confirmation button may complicate things. If you’ve tried this and noticed the filter no longer works, you’re not alone.

Current Implementation

Here's a brief overview of your existing setup without a confirmation button:

Dropdown selection: This allows users to select a type (e.g., 'IN' or 'OUT').

Model binding: A two-way data binding with [(ngModel)] ensures that the selection updates the component's state.

Filtering logic: A simple JavaScript function filters the displayed records based on the selected type.

Solution

Step 1: Modify the HTML

To incorporate a confirmation button, we need to separate the selection and the action. Here’s how to restructure your HTML:

[[See Video to Reveal this Text or Code Snippet]]

Key Changes:

The dropdown retains the two-way data binding with [(ngModel)].

The button triggers the onChangeType method when clicked.

Step 2: Update the TypeScript Method

Next, we need to adjust the filter method. Since we’re adding a confirmation step, the onChangeType method will need to operate without parameters:

[[See Video to Reveal this Text or Code Snippet]]

Explanation:

This function now directly accesses this.selectedBrand to filter the records. After clicking the button, the selected type is used to filter the data, thereby enabling confirmation before applying the filter.

Conclusion

Implementing a dropdown with a confirmation button in your Angular application is straightforward when you separate the selection process from the action. By following the steps laid out in this post, you can enhance user interaction and ensure that data filtering is intentional.

Now it’s your turn! Update your HTML and TypeScript code to integrate this functionality. Users will appreciate the extra step of confirmation when filtering records, leading to a more robust and user-friendly experience.

Feel free to leave comments or questions below regarding your implementation or if you encounter issues along the way!