Ionic 3 Alert CSS Customization - TypeScript

Introduction

In this guide, we will explore how to customize the CSS of an Ionic 3 alert component using TypeScript. Ionic is a popular open-source framework for building cross-platform mobile applications using web technologies such as HTML, CSS, and JavaScript.

Prerequisites

Before we begin, make sure you have the following prerequisites in place:

• Basic understanding of HTML, CSS, and JavaScript
• Ionic 3 project set up and running

Steps to Customize Ionic 3 Alert CSS in TypeScript

Step 1: Create a New Ionic Alert Component

To get started, create a new Ionic alert component by running the following command in your terminal:

ionic generate component CustomAlert

This will generate a new alert component named "CustomAlert" in your Ionic project.

Step 2: Modify the Alert Template

Open the generated custom-alert.html file and customize the template as per your requirements. You can add or modify HTML elements, apply CSS classes, and style the alert layout.

Step 3: Modify the Alert Component

Open the generated custom-alert.ts file and update the TypeScript code to handle the alert component logic. You can add methods for showing and dismissing the alert, handle user interactions, and perform any other desired actions.

Step 4: Style the Alert Component

Open the generated custom-alert.scss file and apply custom CSS styles to the alert component. Here, you can override default Ionic styles and introduce your own styles to fully customize the alert appearance.

Step 5: Use the Custom Alert Component

To use the customized alert component in your application, import and add the <app-custom-alert></app-custom-alert> selector wherever you want to display the custom alert. You can pass input data, handle events, and interact with the alert component as required.

Example Code

Here is an example implementation of a custom alert component in Ionic 3 using TypeScript:

custom-alert.html

<ion-header>
  <ion-toolbar>
    <ion-title>
      Custom Alert
    </ion-title>
  </ion-toolbar>
</ion-header>

<ion-content>
  <ion-list>
    <ion-item>
      <ion-label>Custom Alert Content</ion-label>
    </ion-item>
  </ion-list>   
  
  <ion-button expand="full" (click)="dismiss()">Dismiss</ion-button>
</ion-content>

custom-alert.ts

import { Component } from '@angular/core';
import { ModalController } from 'ionic-angular';

@Component({
  selector: 'app-custom-alert',
  templateUrl: 'custom-alert.html'
})
export class CustomAlertComponent {
  constructor(private modalCtrl: ModalController) { }
  
  dismiss() {
    this.modalCtrl.dismiss();
  }
}

custom-alert.scss

ion-header {
  ion-toolbar {
    background-color: #e74c3c;
    color: #fff;
  }
}

ion-content {
  ion-list {
    ion-item {
      border-bottom: 1px solid #ccc;
    }
    
    ion-label {
      color: #3498db;
    }
  }
  
  ion-button {
    --background: #2ecc71;
    --color: #fff;
  }
}

Conclusion

By following the above steps, you can easily customize the CSS of an Ionic 3 alert component using TypeScript. The provided example showcases the basic customization options, but you can tailor the alert component to meet your specific needs.