Lawrence  Lesch

Lawrence Lesch


How to Implement an Event Bus in TypeScript

Imagine you’re building a Single Page Application using Web Components only. You have several pages, have configured the routes, and need to be able to handle general events or actions.

Here’s when you start to think about potential solutions as well: Maybe it’s time to add state management to the application? Is it a good time to build a “custom” solution? What about using some design patterns in this case?

The answers to these questions will depend on the complexity of the current scenario, the experience of the developers, or on the opinions of the team. It is clear that there is no absolute answer!

In this article, we’ll go over how to communicate between components using a custom Event Bus implementation.

What is an Event Bus?

The Event Bus idea is generally associated with the  Publish-subscribe pattern:

Publish–subscribe is a messaging pattern where senders of messages, called publishers, do not program the messages to be sent directly to specific receivers, called ‘subscribers’, but instead, categorize published messages into classes without knowledge of subscribers

In other words, an Event Bus can be considered as a global way to transport messages or events to make them accessible from any place within the application.

Event Bus

Web Components Communication

When you’re working with Web Components through  LitElement, it’s usual firing events for sending messages between them. You can use either Standard or Custom events.

  • Fire a Standard Event using new Event('event')
  • Fire a Custom Event using new CustomEvent('event', {...options})

For a practical example, let’s assume we have two components at this time: The first one could be named as a parent component and the second one as the child component

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How to Implement an Event Bus in TypeScript
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Event planning & management app is the generic term for a wide range of mobile app products that are used in the management of professional and academic conferences, trade exhibitions, conventions, and events such as Continuing Professional Development meetings.

Development Cost to build an Event Planning & Management App:

Based on the number of hours invested, features, and technologies involved, you can determine a rough estimate of Event Planning or Management app development cost. Cost depends on various factors such as follows.

• Basic & Advance Features

• Technology used

• Chosen Platform (iOS & Android)

• The Location of the app development center

• Mobile App complexity

• Numbers of hours invested in Project

The cost to create such an app can be as high as the number of integrated technologies. However, an app with basic features is certain to cost somewhere around $10,000 to $35,000 for single platforms (Android or iOS). If you want to make an app for various platforms then the cost will be vary based on features, location, development team, etc factors.

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How much does it cost to build a virtual event application in 2021?

A Brief about Virtual Events
After the Covid-19 virtual event trend rising and now the demand has more increased. Digital activities are events held online in their most simplistic sense. Virtual events use web-based platforms to connect thousands of people worldwide.

Virtual events can cover anything, including individual events, but generally, four kinds of virtual events are available: virtual conferences, webinars, hybrid internal & external events. Google Meet, Evia, Digitell, ON 24, Zoom, GoToMeeting and more are among the top virtual event platforms.

Cost to Build a Virtual Event Application in 2021
The development cost of the application mostly depends on the features of a mobile application. The approx cost to build a virtual event app between $20,000 to $50,000 for a single platform (Android & iOS). It may go high if you choose the advanced technology and features while developing.

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AppClues Infotech is a pioneer in providing innovative & unique mobile app solutions that offer impressive results and can make things easier. If you are looking forward to creating an application that can host your virtual events and meetings without gathering your team in the office then you surely are in the right place.

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