Top 5 Terms to Know For JS Web Development

When you first start playing around with web development code, you come across a jargon of new words and terminologies. Remembering all those terminologies can be overwhelming as there are so many of them that becoming familiar with all will probably take the effort of several hours, or maybe days – depending on your capacity to learn.

The focus of this article will particularly be on JavaScript terminologies.

If you are a JS beginner and want to learn about the most crucial JS terms, you are at the right place! Being one of the top IT service providers, we have seen a lot of beginners struggle.

Therefore, we are going to make things simpler for you by mentioning top 5 must-know JS terms for amateurs to get the ball rolling. Let’s see what those terms are.

Var:

The term ‘var’ is used to create new variables in JS. It is one of the most important terms because web app development is all about creating variables and storing data in them. Every bit of data we create for an application is stored in variables, linking that data to memory.

Precisely, variables are how we define things to make the code work. So, it’s important to be completely familiar with this term to flourish your skills.

Syntax example: var countryName = “United State”

Function

This keyword allows defining your own JavaScript functions. Now, you might think why do we need this feature when JavaScript already has a rich collection of available functions?

Well, while developing an application, you are going to perform many custom actions and this will only be possible through functions.

Syntax:

function myFunction(n1, n2)

{

    return n1 * n2;             // the product of two numbers n1 and n2

}

Loop

This feature is particularly useful when you need to perform the same action or a number of actions multiple times in succession.

For example, while writing code, you will always need to perform a certain set of actions or deal with set(s) of data.

Take a table of, let’s say, 2. There are typically 10 steps that you would need to deal with. The action of going through steps one by one and performing calculations in each step separately can be tiring, and require a large block of code. But with a loop, the whole thing can be done just within 4-5 lines.

Syntax:

for(i=1; i<10; i++)

{

    document.write(“<tr><td>” + num + ” x ” + i + ” = ” + num*i + “</td></tr>”);

Conditional

This statement allows applications to make the right choice between one or more options available – just like if-then. It does so by using boolean logic.

Essentially, Boolean logic is looking at a statement and determining whether it’s true or false. We do this all the time in our daily lives.

A great example of Boolean logic is the sentence: “if its cold outside, wear a jacket.”

Conditional statements help coders and programming languages to make logical decisions. Precisely, they are the brain of an application.

Syntax:

if (outside == cold)

{

    caution = “wear a jacket”;

}

 else

{

    caution = “don’t wear a jacket”;

}

 

}

Object

A JavaScript Object has a lot of properties to which values (number, string, array, etc.) are assigned in order to build complex yet easy to use data structures.

The importance of Objects is that the data structures they form are great for real-world problems such as:

A user with properties like username, email, password will need an Object to represent these attributes in the code.

Syntax

Var user = {

name: “john”

email: john@123.com

writes: function()

{

console.log(“writes”);

}

};

 

So, these are some of the most essential terminologies and features you should know for performing web application development tasks in JS.

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