Adding a Scroll to Top button in Angular

In this article, we will talk about Adding a Scroll to the Top button in the Angular application. Scrolling is a fundamental functionality of a website. It allows users to navigate and view content easily. However, when the user scrolls down a long page, it can be tedious to scroll back up to the top of the page. To enhance the user experience, it is useful to add a "Scroll to Top" button to the page. In modern web development, it's essential to provide a smooth user experience. One way to achieve this is by adding a scroll-to-top button to the website. This button helps the user to navigate easily to the top of the page with just a single click. In this article, we will explore how to add a scroll-to-top button in Angular with an example.

A Scroll to Top button is a button that allows users to jump back to the top of the page quickly. This is especially useful for websites with long pages where scrolling back to the top can be time-consuming. We will implement this feature in an Angular application using a simple and efficient approach.

Prerequisites.

Before we start, make sure that you have the following tools installed on your system:

Node.js

Angular CLI

Getting Started

First, let's create a new Angular project by running the following command in your terminal:

ng new dummy_project

Once the project is created, navigate to the project directory and open it in your preferred code editor.

Adding a Scroll-to-Top Button:

Now, let's add a scroll-to-top button to our Angular application. We will create a new component called scroll-to-top that will be responsible for rendering the button.

To create a new component, run the following command in your terminal:

ng generate component scroll-to-top

This command will create a new component called scroll-to-top and add it to the /src/app module.

Next, open the scroll-to-top.component.html file and add the following code:

</button>

</div>

Two important things are happening here. First, I created a button that has the fas fa-chevron-up icon on it. This code will create a button element with an onClick event listener that calls the scrollToTop method. We have also added a Font Awesome icon to the button to make it look more visually appealing.

In order to use FontAwesome, you’ll need to have the following in the head of your index.html file:

Now, The next important event in this scenario is what happens when you press the (click)="scrollToTop()" button. To define that function, open the scroll-to-top.component.ts file and add the following code:

import { Component, OnInit, Inject, HostListener } from '@angular/core';

import { DOCUMENT } from '@angular/common';

@Component({

selector: 'app-scroll-to-top',

templateUrl: './scroll-to-top.component.html',

styleUrls: ['./scroll-to-top.component.css']

})

export class ScrollToTopComponent implements OnInit {

constructor()

}

scrollToTop() {

(function smoothscroll() {

var currentScroll = document.documentElement.scrollTop || document.body.scrollTop;

if (currentScroll > 0) {

window.requestAnimationFrame(smoothscroll);

window.scrollTo(0, currentScroll - (currentScroll / 8));

}

})();

}

ngOnInit() { }

}

This function will scroll the window until it reaches the top. This code defines the ScrollToTopComponent class, which contains a method called scrollToTop. This method uses the window.scrollTo function to scroll the page to the top with a smooth animation.

Using the Scroll-to-Top Button:

we need to implement the component. I want this available on every page, so I added it to my app.component.html file. However, if you only want this functionality on a specific page or set of pages, you could add it to a different file. To implement, simply add the following to the HTML file:

<app-scroll-to-top></app-scroll-to-top>

If you named your component in the same way I did, your tag names will be the same. However, you can always check the required tag names by checking the selector part of the @Component in your .ts file. My selector, as you can see above, is app-scroll-to-top. My tags are called app-scroll-to-top for this reason.

Styling the Scroll-to-Top Button:

To make the scroll-to-top button look better, we can add some styles to it. Open the scroll-to-top.component.css file and add the following code:

.scroll-to-top {

position: fixed;

bottom: 15px;

right: 15px;

opacity: 0;

transition: all .2s ease-in-out;

}

.show-scrollTop {

opacity: 1;

transition: all .2s ease-in-out;

}

This is what positions the arrow in the bottom right of the screen. This code will style the button and position it at the bottom right corner of the page. The button will be hidden by default and will only be visible when the user scrolls down the page.

Points to remember:

Here are some points to remember when adding a scroll-to-top button in an Angular application:

Create a button component: Create a new component for the scroll-to-top button. This component should contain the button HTML and styling.

Add click event handler: Add a click event handler to the button that scrolls the page to the top. You can use the window.scrollTo() method or the document.documentElement.scrollTop property to achieve this.

Show/hide the button: Determine when to show or hide the button. You can use the window. scrollY property to check the current scroll position and toggle the visibility of the button based on a certain threshold.

Add animations (optional): Add some animations to make the button more interactive and visually appealing. You can use Angular's built-in animations or a third-party animation library like GSAP or Animate.css.

Test thoroughly: Test the button thoroughly to ensure it works as expected on different browsers and devices. Make sure it doesn't interfere with other functionality on the page.

By following these steps, you can add a scroll-to-top button to your Angular application that improves user experience and makes it easier to navigate long pages.

Conclusion:

In conclusion, adding a Scroll to Top button in Angular is a relatively straightforward process. By using the built-in directives and event listeners in Angular, you can create a button that scrolls to the top of the page when clicked. To implement this feature in Angular, you can use various approaches such as using a simple CSS style, implementing a directive or a component, or using a third-party library. The approach you choose will depend on your specific requirements and the complexity of your application.

Hope you enjoyed reading this article and found it useful. Please share your thoughts and recommendations in the comment section below.