Frontend Development

Q1: What are the most basic technologies to start with Front-end Development? 

Answer: 

If you want to start front-end development from the very scratch, you must start by learning HTML- for structure, CSS- for styling, and then move towards JavaScript. First understand all the core concepts of the language like Variables, Functions, Event Handling, etc. And then slowly move towards learning some framework of JavaScript for example React, Angular, Vue etc. 

Q2: Where can I learn the basics of JavaScript? 

Answer: 

You can refer to our JavaScript Tutorial. Here, You’ll find all the core concepts of JavaScript. The articles are further linked. You may give it a read. 

If You want a brief introduction to What is JavaScript and how it works you can refer to our JavaScript Cheat Sheet

Q3: Which framework should I choose for front-end development?

Answer: 

Each framework of JavaScript has its features and every framework is effective for front-end development. One can start with React.js, as It has great community support and It’s the most widely used framework for front-end development.

Q4: Is learning all these mentioned frameworks required?

Answer: 

No, You can start with one and start working on it. 

Front-end Development is the part of web development that is focused on the user end of a website or web application. It involves the development of elements that provides the interaction between the user and browsers. HTML, CSS, and JavaScript are the main components used by front-end developers. HTML is used for the structure of the page, CSS is used for the styling and JavaScript is used for the dynamic effects on the webpage. 

HTML and CSS are not so difficult or complex to learn. It is JavaScript that makes the web development easy and interesting. Now, It completely depends on the project how much JavaScript knowledge is required in the project. But, to become proficient in JavaScript one must have a good understanding of the following things: 

1. Variables, Data types, and Operators

Variables in JavaScript are to hold values in a program. We use ‘let‘, ‘const‘, and ‘var‘ as a variable declarations in JavaScript. These can store any datatype, be it a number, string, or character. 

Datatypes are different types of values that some variables hold. For example String, Number, Boolean, Character, and Undefined (in the case of JavaScript). 

Operators are used for performing various operations like: Arithmetic operations( ‘+’, ‘-‘, ‘*’ ,’/’ ) , Assignment operations(‘=’), Logical operations and Conditional operations etc. 

2. Functions

A function is a block of code that can be executed whenever it is called. Functions are essential for code organization and reusability, allowing you to define a block of code once and use it multiple times throughout your program.

These functions are generally declared using a “function” keyword, followed by a set of parenthesis and then inside this function, a set of instructions is written, which is to be followed when this function is called.  

Syntax: The basic syntax to create a function in JavaScript is shown below.

function functionName(Parameter1, Parameter2, ...)
{
    // Function body
}

Examples:

function addNumbers(num1, num2) {
 return num1 + num2;
}
let sum = addNumbers(3,5); // this sum will be equal to (3+5 = 8)

These functions can also be assigned some variable like let, const. The same function can be written as : 

const addNumbers = function(num1, num2) {
 return num1 + num2;
}
const sum = addNumbers(3,5); //This also returns 8.

There are also Arrow Functions in JavaScript. These functions provide a more concise syntax for defining simple functions. The same function to add two numbers can be written as arrow functions as the following: 

Syntax: The basic syntax to create arrow function in JavaScript is shown below

const gfg= (parameter1, parameter2) => {
    // Function body;
}

Example:

const addNumbers = (num1, num2) => num1 + num2;

let sum = addNumbers(2, 3); // sum is now equal to 5

Functions in JavaScript are very powerful that allow for code reusability, and flexibility. By mastering functions, one can write more efficient and maintainable code that is easier to debug and update over time. 

3. DOM Manipulation

DOM (Document Object Model) manipulation is a process of updating the DOM according to the actions of users. There are various methods that for DOM manipulation. A few of them are as follows –

• getElementById(): This method retrieves an element from the DOM by its ID.
• getElementsByTagName(): This method retrieves a collection of elements with the specified tag name.
• querySelector(): This method retrieves the first element that matches a specified CSS selector.
• innerHTML: This property can be used to update the HTML content of an element.

4. Event Handling

Event handling is a process that helps to respond the events and user actions. There are events like mouseover, mouseout, etc. There are several event-handling methods. Some of those are as follows:
 

• addEventListener(): This method adds a function to be executed when a specified event occurs.
• removeEventListener(): This method removes an event listener that was previously added using addEventListener().
• Mouseover and Mouseout: The mouseover and mouseout events are triggered when the mouse pointer moves over and out of an element, respectively. These events can be used to create effects like changing the color of a button when the mouse hovers over it.

The above concepts are the core of JavaScript, which helps you master JavaScript. Now, to become a front-end developer you must be knowing some of the JavaScript frameworks for front-end development. There are various frameworks of JavaScript that make front-end development easy. These frameworks provide pre-built libraries, modules, and tools to streamline and simplify front-end development.