how to reset the styles of listitems in onlick event in angular

How to Reset the Styles of List Items in an onClick Event in Angular

When working with Angular, you may come across a scenario where you need to reset the styles of list items in response to an onClick event. This can be useful when you want to remove any applied styles or classes and revert the list items to their default state.

In this blog post, we will explore two possible solutions to achieve this functionality in Angular.

Solution 1: Using ngClass Directive

The first solution involves using the ngClass directive provided by Angular. This directive allows us to dynamically add or remove CSS classes based on certain conditions.

To reset the styles of list items in an onClick event, we can define a CSS class that represents the default styles. Then, we can bind this class to the list items using the ngClass directive. When the onClick event is triggered, we can remove any additional classes that were applied and only keep the default class.

Here’s an example code snippet:

/* CSS */
.default-style {
  /* Define your default styles here */
}

/* HTML */

  
List Item 1
  
List Item 2
  
List Item 3


/* TypeScript */
isAdditionalStyleApplied: boolean = false;

resetStyles() {
  this.isAdditionalStyleApplied = false;
}

In the above code snippet, we have defined a CSS class called “default-style” that represents the default styles for the list items. We have also added an “additional-style” class to demonstrate the removal of additional styles.

When the onClick event is triggered, the “resetStyles” method is called, which sets the “isAdditionalStyleApplied” variable to false. This causes the ngClass directive to remove the “additional-style” class, leaving only the “default-style” class applied to the list items.

Solution 2: Using Renderer2

The second solution involves using Angular’s Renderer2 class to modify the styles of list items directly.

To reset the styles of list items in an onClick event, we can access the list items using Angular’s ViewChild decorator and Renderer2 class. We can then use the Renderer2’s removeStyle method to remove any applied styles and revert the list items to their default state.

Here’s an example code snippet:

/* HTML */

  
List Item 1
  
List Item 2
  
List Item 3


/* TypeScript */
import { Component, ViewChild, ElementRef, Renderer2 } from '@angular/core';

@ViewChild('listItem1') listItem1: ElementRef;
@ViewChild('listItem2') listItem2: ElementRef;
@ViewChild('listItem3') listItem3: ElementRef;

resetStyles(listItem: ElementRef) {
  this.renderer.removeStyle(listItem.nativeElement, 'your-style-property');
}

constructor(private renderer: Renderer2) {}

In the above code snippet, we have used the ViewChild decorator to access the list items in the component. When the onClick event is triggered, the “resetStyles” method is called with the respective list item as an argument. Inside the method, we use the Renderer2’s removeStyle method to remove any applied styles.

Remember to replace “your-style-property” with the actual style property you want to reset, such as “color”, “background-color”, etc.

These are two possible solutions to reset the styles of list items in an onClick event in Angular. Choose the one that best suits your requirements and implement it in your Angular project.

Happy coding!