10 Things All Web Developers Should Learn in 2020

10 Things All Web Developers Should Learn in 2020

10 Things All Web Developers Should Learn in 2020. In this tutorial we will look at 10 crucial things to know and understand in web development.

10 Things All Web Developers Should Learn in 2020. In this tutorial we will look at 10 crucial things to know and understand in web development.

Angular 9 Tutorial: Learn to Build a CRUD Angular App Quickly

What's new in Bootstrap 5 and when Bootstrap 5 release date?

What’s new in HTML6

How to Build Progressive Web Apps (PWA) using Angular 9

What is new features in Javascript ES2020 ECMAScript 2020

Angular vs. React: Rendering an Array

Angular vs. React: Rendering an Array

How Angular and React differ in rendering an Array. A comparison of methods rendering an Array. We often need to render an array in the UI. Angular does this by using *ngFor — an HTML construct. React does this by using map() — a JS method. That's about it for rendering arrays in Angular and React.

Scenarios Where You Need to Render an Array

No rocket science behind this — scenarios to render an array are commonplace. The array to render could be an array of heroes (see the mighty Heroes example). It could be an array of items to buy or chores to complete. Or a menu to render based on an array of options. Or maybe you are working for an insurance company and you have an array of plans to render. Perhaps you are creating an e-commerce website and you have items to render based on an array returned by a search operation. Arrays everywhere!

Angular’s Way: *ngFor

Angular uses a special HTML construct: *ngFor

Code


The array to render — TS file

Angular uses *ngfor to render an array — HTML file

Code explained

Line 6 sets up the *ngFor loop. It takes the first item of the plans array and renders lines 7 and 8 (in fact, any number of lines in between the tags where *ngFor is used — ul here) for it.

Step one is then repeated for each item in the array.

React’s Way: map()

React makes use of the JS map method for this purpose. What map() essentially does is to map (or transform) each element of the original array to the elements of a new array.

The essence of mapping operation

In other words, the map() transforms each item of the original array into elements of a new array.

Code


The array to render — JS file


Use of map to render an array in React

Code explained

Step 1. In effect, map() takes the first element of the plans array and puts it in the plan variable in line 48.

Step 2. It then creates a new array with the latter’s elements being:

  • {{plan.name}} — ${{plan.premiumInDollars}}
  • Validity in years: {{plan.validityInYears}}

    Thereafter, map() repeats steps 1. and 2. for each element of the original array.

    map() in action

    Edit: We need keys too while rendering an Array in React. See my piece on React keys here.

    Full Examples Angular

    https://stackblitz.com/edit/angular-ngfor-sample-example?embed=1&file=src/app/app.component.ts

    React

    https://stackblitz.com/edit/react-map-example?embed=1&file=index.js

    Summary

    We often need to render an array in the UI.

    Angular does this by using *ngFor — an HTML construct.

    React does this by using map() — a JS method.

    That’s about it for rendering arrays in Angular and React.

    Happy coding!

    Originally published by Aanchal Kapoor at https://medium.com

    Node vs Angular : Comparing Two Strong JavaScript Technologies

    Just from being a simple client-side scripting language, JavaScript has evolved over the years to turn out to be a powerful programming language. Here Node.js is a cross-platform runtime environment while AngularJS is one of the top JavaScript framework. Angular helps the developers to build web applications which are dynamic in nature using HTML template language and following the MVC design pattern.

    Angular, React, Vue and Co. – Web Components and Micro Apps

    Angular, React, Vue and Co. – Web Components and Micro Apps

    Angular, React, Vue and Co. – Web Components and Micro Apps. How to use Web Component to build a Micro App architecture. Web Development is exciting nowadays! We get new innovative technologies on a regular basis. While this is awesome it can also be overwhelming, especially when you have to maintain a product for the long term. Web Components and Micro Apps provide a remedy for this dilemma. How to use it to mix different technologies. How to implement overreaching routing, messaging and authentication

    Web Development is exciting nowadays! We get new innovative technologies on a regular basis. While this is awesome it can also be overwhelming, especially when you have to maintain a product for the long term.

    Web Components and Micro Apps provide a remedy for this dilemma. They allow for decomposing a big solution into small self-contained parts that can be maintained by different teams using the best technology for the requirements in question. Come to this session and find out how this idea helps with writing applications that can evolve over a decade and more.

    Let’s peacefully unite the best technologies for the different parts of our big enterprise applications!

    What are the key takeaways from this talk?

    • How to use Web Component to build a micro-app architecture
    • How to use it to mix different technologies
    • How to implement overreaching routing, messaging and authentication