JavaScript Saves the World

JavaScript Saves the World

JavaScript Saves the World - How to build a green sustainable web application with NestJS and Serverless. When building apps, we focus on minimizing costs, time to market, bugs, bundle size, application speed, SEO, but we spend almost no effort trying to minimize the damage our applications are making to the environment.

JavaScript Saves the World - Data centers produce about 3% of the world's greenhouse gases and this is set to treble in the next 10 years. When building apps, we focus on minimizing costs, time to market, bugs, bundle size, application speed, SEO, but we spend almost no effort trying to minimize the damage our applications are making to the environment. Asim discusses how to build a green sustainable web application with NestJS and Serverless.

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

Introduction to Electron: Build Desktop App using Node and JavaScript

Introduction to Electron: Build Desktop App using Node and JavaScript

Introduction to Electron: Build Desktop App using Node and JavaScript. In this Electron tutorial, Felix will give a technical introduction to Electron. He’ll cover the basics and explain both benefits and challenges of using Node.js and JavaScript to build major desktop applications. How to build your first Desktop App with JavaScript using Electron.

Electron: Desktop Apps With JavaScript

Introduction to Electron: Build Desktop App using Node and JavaScript

Chances are high that you’re already using desktop software built with JavaScript and Node.js: Apps like Visual Studio Code, Slack, or WhatsApp use the framework Electron to combine native code with the conveniences of Node.js and web technologies.

In this talk, Felix will give a technical introduction to Electron. Building a small code editor live on stage, he’ll cover the basics and explain both benefits and challenges of using Node.js and JavaScript to build major desktop applications.

JavaScript Tutorial: if-else Statement in JavaScript

JavaScript Tutorial: if-else Statement in JavaScript

This JavaScript tutorial is a step by step guide on JavaScript If Else Statements. Learn how to use If Else in javascript and also JavaScript If Else Statements. if-else Statement in JavaScript. JavaScript's conditional statements: if; if-else; nested-if; if-else-if. These statements allow you to control the flow of your program's execution based upon conditions known only during run time.

Decision Making in programming is similar to decision making in real life. In programming also we face some situations where we want a certain block of code to be executed when some condition is fulfilled.
A programming language uses control statements to control the flow of execution of the program based on certain conditions. These are used to cause the flow of execution to advance and branch based on changes to the state of a program.

JavaScript’s conditional statements:

  • if
  • if-else
  • nested-if
  • if-else-if

These statements allow you to control the flow of your program’s execution based upon conditions known only during run time.

  • if: if statement is the most simple decision making statement. It is used to decide whether a certain statement or block of statements will be executed or not i.e if a certain condition is true then a block of statement is executed otherwise not.
    Syntax:
if(condition) 
{
   // Statements to execute if
   // condition is true
}

Here, condition after evaluation will be either true or false. if statement accepts boolean values – if the value is true then it will execute the block of statements under it.
If we do not provide the curly braces ‘{‘ and ‘}’ after if( condition ) then by default if statement will consider the immediate one statement to be inside its block. For example,

if(condition)
   statement1;
   statement2;

// Here if the condition is true, if block 
// will consider only statement1 to be inside 
// its block.

Flow chart:

Example:

<script type = "text/javaScript"> 

// JavaScript program to illustrate If statement 

var i = 10; 

if (i > 15) 
document.write("10 is less than 15"); 

// This statement will be executed 
// as if considers one statement by default 
document.write("I am Not in if"); 

< /script> 

Output:

I am Not in if
  • if-else: The if statement alone tells us that if a condition is true it will execute a block of statements and if the condition is false it won’t. But what if we want to do something else if the condition is false. Here comes the else statement. We can use the else statement with if statement to execute a block of code when the condition is false.
    Syntax:
if (condition)
{
    // Executes this block if
    // condition is true
}
else
{
    // Executes this block if
    // condition is false
}


Example:

<script type = "text/javaScript"> 

// JavaScript program to illustrate If-else statement 

var i = 10; 

if (i < 15) 
document.write("10 is less than 15"); 
else
document.write("I am Not in if"); 

< /script> 

Output:

i is smaller than 15
  • nested-if A nested if is an if statement that is the target of another if or else. Nested if statements means an if statement inside an if statement. Yes, JavaScript allows us to nest if statements within if statements. i.e, we can place an if statement inside another if statement.
    Syntax:
if (condition1) 
{
   // Executes when condition1 is true
   if (condition2) 
   {
      // Executes when condition2 is true
   }
}

Example:

<script type = "text/javaScript"> 

// JavaScript program to illustrate nested-if statement 

var i = 10; 

if (i == 10) { 

// First if statement 
if (i < 15) 
	document.write("i is smaller than 15"); 

// Nested - if statement 
// Will only be executed if statement above 
// it is true 
if (i < 12) 
	document.write("i is smaller than 12 too"); 
else
	document.write("i is greater than 15"); 
} 
< /script> 

Output:

i is smaller than 15
i is smaller than 12 too
  • if-else-if ladder Here, a user can decide among multiple options.The if statements are executed from the top down. As soon as one of the conditions controlling the if is true, the statement associated with that if is executed, and the rest of the ladder is bypassed. If none of the conditions is true, then the final else statement will be executed.
if (condition)
    statement;
else if (condition)
    statement;
.
.
else
    statement;


Example:

<script type = "text/javaScript"> 
// JavaScript program to illustrate nested-if statement 

var i = 20; 

if (i == 10) 
document.wrte("i is 10"); 
else if (i == 15) 
document.wrte("i is 15"); 
else if (i == 20) 
document.wrte("i is 20"); 
else
document.wrte("i is not present"); 
< /script> 

Output:

i is 20

Learn NPM - The Node Package Manager for JavaScript

Learn NPM - The Node Package Manager for JavaScript

Learn the fundamentals of NPM - The Node Package Manager for JavaScript - NPM for Beginners - NPM Crash Course: What is NPM? NPM stands for Node Package Manager and it is used mainly to download and install JavaScript Packages. NPM comes with Nodejs already as a default so we would need to download that first in order for us to use it.

Free JavaScript Tutorial - NPM for Beginners - Fast Track

Learn NPM - The Node Package Manager for JavaScript

NPM stands for Node Package Manager and it is used mainly to download and install JavaScript Packages. This course would be beneficial for any web developer who is looking to make his or her life easier by using code that is already written instead of starting from scratch.

NPM comes with Nodejs already as a default so we would need to download that first in order for us to use it. This is a short course full of useful content and tips.

What you'll learn

  • Students will learn the fundamentals of NPM