Java script was developed via Brendan Eich in Netscape in 1995 for coding in net pages allowing the logical operation to the client area. Javascript is specifically a customer area script language. This item-focused script language is maximum commonly used for designing net pages which can be a standalone language evolved in Netscape. It offers the consumer extra manipulate over the browser with capability in the advent of new capabilities in scripts. This scripting language functions case-touchy enter with the detection of the user’s browser and running gadget. Javascript is more often than not used by validation in customer edge technology.

The following are more characteristics of JavaScript:

The Statement Control Syntax system of JavaScript may be very just like assertion manipulate syntax utilized in c program language period. JavaScript allows greater abilities to carry out as HTML is handiest capable of designing websites and incapable of performing logic operations like circumstance checking, statements looping (while & for), assertion selection making (else and if) at patron area, and adding numbers.

Javascript is incapable of acting these features which results in our want for javascript to execute these operations over the patron side. This scripting language can help to construct extra interactive websites, broaden inbuilt clocks, light patron edge packages, construct windows popups with special conversation containers like alerting conversation boxes, confirmation dialog containers, and set-off dialog options.

Nowadays many web-based giants are using the technology of Java Script like Facebook, Youtube, Twitter, Gmail and google maps, and so on. The JavaScript capabilities enterprise-level pop-down menus, establishing, and closure of new window, manipulation of HTML layers, interface enhancement of HTML, adding animation essentials within the page, including dynamic look in files of HTML, and solving of problems associated with browsers.

The validation of facts input inside HTML form facts which are being despatched to the server may be carried out by the use of javascript. Users can also carry out manipulation of information for layers of HTML like transferring capability, hiding, trading in the interface of HTML codes, and writing them one after the other are some tremendous capabilities of JavaScript.

Now let us see the features of JavaScript in detail:

Object Centered Language features built in the object as Java Script has a window object. A few commonplace examples of item-focused languages are javascript and visual basic and so on. Object-focused languages are in most cases used for functions like polymorphism which is a great of taking an item in lots of forms. Use of polymorphism within object-orientated programming requires whenever we use it to represent reference of the discern magnificence to an item of a toddler magnificence.

The client is a term used for net browser in respective of person. The data at the server gets uploaded through a patron which is later utilized by a consumer within the rendered form. The user receives gets admission to the customer via a web browser for surfing and interacting through websites. The client aspect era in JavaScript allows the purchaser to have complete manipulate over the content material that's being updated in servers.

Validation of User’s Input is most commonly known as form validation, it allows users to interact with clients through filling forms through web pages. The details in the form need to be correctly filled where form validation helps the client to validate the details entered by the user.

IF and Else Statements are used to perform logical operations.

Java Script is built with Interpreter Centered which allows the user to get the output without the use of a Compiler. That means the input performed by the user gets rendered directly without the compiling of codes.

Java Script has many In-Built Functions like isNAN (), Number (), parseFloat () and parseInt () etc. isNAN () Function is used to identify that input object is correct number format. parseFloat () function is used in the conversion of the object into a number. parseInt () Function is used to analyze strings.

The codes written in Java Script are Case Sensitive which explains that there will be no difference in the output whether the codes are written in Upper Case or Lower Case Format.

Java Script Features Light Weight and delicate and codes written in JavaScript don’t include variables and use only objects to perform the operations. 

The statement looping is used to perform the same operations repeatedly. In this operation the same set of code run in a repeated manner for a specific or unspecific set of time.

The Java Script can control operations updated on servers. This is controlling the response on the website when the user tries to perform any operation the server handled by the client like clicking on links and options, interaction response over the website, etc.

This helps understand the purpose of code, Comments will not be displayed in the output rendered by JavaScript.

There are two types of Java Script Comments:

These Comments can be identified using double forward Slashes.

An example of Comments written under Single Line is:

//  This is how we write comments is single line

document.write ( “HTML and JavaScript” );

These Comments can be identified with a structure that starts with a forwarding slash and asterisk and ends with an asterisk and forward slash.

Example of Comments written under Multi-Line:

/* This is how we write comments in Multi-Line /*

Document.write ( “Features of JavaScript” );

Reading and Writing Capability on client edge is not available in Java Script.

Performing Functioning with Network Programs is not available in Java Script.

Today we will start the discussion with Features of JavaScript.

Features of JavaScript

JavaScript request function is used to change statistics from server-facet sources. The requested feature sends and receives records from the server by making http requests. Those requests are performed in conjunction with a fetch characteristic to get a response. These terminologies ‘request’, ‘fetch’, and ‘reaction’ are replacements for ‘XMLHttpRequest’. Internet, which is made from a wide variety of servers which can be interconnected computer systems, surfing the net advert navigating via the pages is similar to you are inquiring for the browser to send you the statistics from the servers. In this newsletter, we shall study some approaches to send javascript request features.

var request = new Request(sample_url: String, [init: Object]);

sample_url: It contains the direct URL of the response you want to fetch from the request is the object creates a copy,

init: Object, can contain custom settings to apply for a request. Some of the possible options are listed below:

method: We have two request methods, ‘GET’, ‘DELETE’ and ‘POST’, the default being ‘GET.’

body: ‘Blob’, ‘FormData’, ‘ReadableStream’, or anybody you want to add to the request.

mode: Request mode like ‘cors’, ‘no-cors’, or ‘navigate’. Default being ‘cors’.

cache: mode of cache used for the request.

credentials: Credentials that are sent to use for the request. ‘omit’, ‘same-origin’. Default being ‘same-origin’.

redirect: modes used for the request: error, follow, or manual. Default being ‘follow’.

integrity: Involves subresource integrity value for the request.

referrer: default referrer being about: client

headers: the key-value object of HTTP headers to be set

GET request is simpler and faster than the POST method.

POST requests are used to update a file or a database on the server.

POST is also used to send a large amount of data with no size limitations

POST method is far more robust and secure than the GET method; input may contain unknown characters.

Given below are the examples of JavaScript Request:

JavaScript Request fetch() method to get the IP address of the machine.

<h2> Using fetch method to get the JavaScript request</h2>

<p>( The above is the IP Address of your machine )</p>

document.querySelector("#ipAddress").innerHTML = ipJson.ip;

Using XMLHTTPRequest of JavaScript Request function to get the IP. Above example uses fetch() method, here we are using XMLHTTPRequest().

<h2> Using XMLHTTPRequest method to get the JavaScript request</h2>

IPxhr.open('GET', "https://ipinfo.io/json", true);

IPxhr.onreadystatechange = processRequest;

if (IPxhr.readyState == 4 && IPxhr.status == 200) {

In this blog, we will discuss JavaScript Requests.

JavaScript Request

We know JSON serialization and deserialization, JSON stringify, JSON parser, and so on. Conversion of string to JSON may be finished in javascript, java, python, and many other languages too. So, what do you mean by this conversion of string to JSON? JSON. Parse method is used to convert the entered string to JSON object by using following some specs. Convert string to JSON converts an enter string to a JSON item for the user to have output in a readable format like a map or an array. This conversion is feasible by JSON.Parse() in javascript. In java, the JSON object is used for conversion, whereas in python, JSON.Masses() are used for this conversion.

Arguments ‘string’ is a required parameter where a string is written in JSON format.

The reviver function is an optional parameter that is used to transform results. If this reviver function returns a valid value, the item value gets replaced with a transformed value. If in case, the reviver returns undefined, then the item is deleted.

var obj = JSON.parse('{ "employeeName":"Amar", "age":36, "city":"Paris"}');

SyntaxError exception is thrown if the string to parse is not a valid JSON.

Conversion of String to JSON in JavaScript:-

JSON item, a data type in js with properties and cost pairs defined, JSON is information interchange format. A bunch of characters is formatted in various programs for easy conversation, which returns JSON items corresponding to JSON textual content/ string.

var jsonSample = ‘{“employeeName”: “Amar”}’;

console.log(obj.employeeName); // prints “Amar”

console.log(jsonSample.employeeName); // prints undefined

Given below are the examples of Convert String to JSON:

const jsonSample = '{"result":false, "count":24}';

console.log(JSON.parse('[14, 45, "true"]'));

//console.log(JSON.parse('[11, 22, 33, 44, ]'));

//console.log(JSON.parse('{"dob" : 34, }'));

//console.log(JSON.parse("{'age': 10}"));

var txt = '{"employeeName":"Amar", "age":36, "city":"Paris"}'

document.getElementById("demo").innerHTML = obj.employeeName + " of age " + obj.age + " lives in " + obj.city;

<h2>Conversion of JSON string to date object</h2>

var sampleText = '{"employeeName":"Amar", "dob":"1986-06-24", "city":"Paris"}';

document.getElementById("demo").innerHTML = obj.employeeName + " was born on " + obj.dob + " in " + obj.city;

<h2>Conversion of JSON string to function using parse</h2>

var sampleText = '{"employeeName":"Amar", "age":"function() {return 34;}", "city":"Paris"}';

document.getElementById("demo").innerHTML = obj.employeeName + " of age " + obj.age() + " lives in " + obj.city;

<title>Conversion of String to JSON in JavaScript</title>

style="border:solid 1px #CCC;padding:0 6px;">

In this blog, we will discuss Convert String to JSON

How to convert String to JSON - JavaScript

I am just learning javascript from  few days ago please someone help me.

Anik I can see that you are asking for useState in javascript but useState is a react concept .it basially use in React js not in javascript

example : const [state, setState]=useState('hello')

where state is the current value and setState is a function which return the updated value.

2-  And Map() is a javascript method which creates an array by calling a specific function on each element present in the parent array.  a non-mutating method. Generally map () method is used to iterate over an array and calling function on every element of array.

How to  implementing map() function and useState() in javascript?				

please someone tell me about this and give an example.

Ajax is a client-side technology. In simpler terms, Ajax is mostly used for updating or modifying the webpage contents without having to refresh it.

NaN :-"Not-a-Number". In JavaScript, NaN is a number that is not a legal number

New keyword in JavaScript is used to create an instance of an object that has a constructor function. On calling the constructor function with ‘new’ operator

const fruit1 = new Fruit('Yellow', 'Sweet', 1);

A falsy value is something which evaluates to FALSE, for instance when checking a variable. There are only six falsey values in JavaScript: undefined, null, NaN, 0, "" (empty string), and false of course.

 What is AJAX, NaN, a new keyword, the falsy value in Javascript ?				

please someone give me brief description about it .

Higher Orders Functions are functions that perform operations on other functions.

In this definition, operations can mean taking one or more functions as an argument OR returning a function as the result. It doesn't have to do both. Doing one or the other qualifies a function as a higher order function.

What is HOF (Higher Order Function) in javascript ?		

JavaScript provides both primitive values (e.g., numbers, strings, Booleans) and objects. While methods and properties can be used with primitive values through implicit type coercion, objects offer distinct advantages in certain scenarios. Here are some reasons for the need of having objects in JavaScript:

Organizing Data: Objects allow for the creation of complex data structures by grouping related values. This organization enhances code readability and maintainability, as data elements can be logically grouped and accessed through meaningful properties.

Encapsulation and Abstraction: Objects encapsulate data and behavior together, enabling the implementation of more complex functionalities. Methods associated with objects allow for abstraction, as they encapsulate the underlying logic and expose only the necessary interfaces to interact with the data.

Extensibility: Objects in JavaScript can be easily extended and modified by adding or modifying properties and methods dynamically. This flexibility is crucial for adapting and evolving codebases, allowing developers to incorporate new functionality or modify existing behavior as requirements change.

Object-Oriented Programming Paradigm: JavaScript supports the object-oriented programming (OOP) paradigm, which promotes code organization, modularity, and reusability. Objects serve as the building blocks for implementing classes, inheritance, and polymorphism, facilitating the creation of modular and maintainable code.

Complex Data Manipulation: Objects provide powerful tools for manipulating complex data structures. With objects, you can easily store and retrieve nested data, create arrays of objects, use object references, and perform operations like sorting and filtering based on object properties.

Passing by Reference: Objects in JavaScript are passed by reference, whereas primitive values are passed by value. This means that when an object is passed as a parameter to a function or assigned to a variable, changes made to the object within the function or the assigned variable affect the original object. This behavior is useful for sharing and manipulating data across different parts of a program.

Object Prototypes and Inheritance: JavaScript's prototypal inheritance allows objects to inherit properties and methods from other objects. This mechanism promotes code reuse and enables the creation of object hierarchies with shared behavior. By leveraging prototypes, you can avoid code duplication and build more efficient and flexible systems.

While methods and properties can be used on primitive values due to JavaScript's automatic type conversion, objects offer a more structured and powerful approach for working with complex data, implementing modular code, and leveraging object-oriented programming principles. They provide a foundation for building scalable, maintainable, and reusable JavaScript applications.

What is the need of having objects in JS as we can use methods and properties on primitive values ?					

I found the solution it will helpful to you ,you go through this link;

How to do photo masking on selection in js or j query ?			

In javaScript querySelectorAll() method returns all the css selectors which matches.

 What is the use of query selector all in javaScript?				

 What is the use of query Selector All in JavaScript?				

The main differences between these methods are:

1. Normal auth requires users to remember and provide their login credentials for each application or service they use, while Passport and OAuth allow users to use their existing credentials from a third-party service.

2. Passport simplifies the authentication process by providing a consistent interface for different authentication strategies, while OAuth provides a standardized way for applications to access user data.

3. OAuth provides a secure way for applications to access user data without storing passwords, which is especially important for applications that require access to sensitive data.

What is the difference between using normal auth , passport and oauth ?				

Assuming you have a table with checkboxes in each row, you can use JavaScript to get the row elements of the checkbox that is clicked.

One approach is to attach an event listener to each checkbox and listen for the "click" event. When a checkbox is clicked, you can use the event object to get a reference to the checkbox element itself (event.target), and then navigate up the DOM to find the corresponding row element.

  // Get the checkbox element that was clicked

  // Navigate up the DOM to find the corresponding row element

  var row = checkbox.parentNode.parentNode;

  // Get an array of the row's child elements (the columns)

  var columns = row.getElementsByTagName("td");

  // Do something with the column elements

  console.log(columns[0].textContent); // Output the text of the first column

  console.log(columns[1].textContent); // Output the text of the second column

In this example, the getRowElements function is called whenever a checkbox is clicked. The function uses the event object to get a reference to the checkbox element, navigates up the DOM to find the corresponding row element, and then uses the getElementsByTagName method to get an array of the row's child elements (the columns). You can then manipulate or extract data from these column elements as needed.

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Trending Blogposts on js

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