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Data type concept in Javascript | Javascript Datatype in simple way

 Data type in JavaScript: JavaScript is a versatile and powerful programming language widely used for web development. One of its key features is its flexibility in handling data types. JavaScript is a loosely coupled language, which means it determines the data type of a variable at runtime. This provides flexibility, allowing variables to store any type of data. Let's dive into the different data types in JavaScript and understand their significance. Why Data Types Matter Data types help in determining the size of data in memory and dictate what kind of operations can be performed on the data. In JavaScript, the data type of a variable can change during the execution of a program, allowing for dynamic and flexible programming. Scalability of JavaScript Variables In JavaScript, a variable's memory can scale up and scale down based on the data assigned to it. This dynamic allocation and reallocation of memory make JavaScript efficient in handling varying data sizes. Types of Da...
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Top 50 Javascript Interview Question | Javascript Interview question in 2024

 If you are preparing for NODE JS, REACT JS, JAVA, ANGULAR, PYTHON or .NET Developer profile then this question set is mandatory to you. Here are top 40 Javascript questions that are frequently asked in Frontend interviews - 𝟭-𝟭5: 𝗕𝗮𝘀𝗶𝗰𝘀 𝗼𝗳 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 1. What is JavaScript? 2. Explain the difference between let, const, and var. 3. How does hoisting work in JavaScript? 4. Describe the concept of closures. 5. Explain the event loop in JavaScript. 6. What is the difference between == and ===? 7. How do you check the type of a variable in JavaScript? 8. What is the use of the this keyword in JavaScript? 9. Explain the difference between function declaration and function expression. 10. How does the setTimeout function work? 11. what is collection and explain type of collection 12. what is undefine type in javascript? 13.  How to implement data abstraction & data encapsulation in Javascript? 14. What is Inheritance in javascript, explain type of inheritance?...
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JavaScript OOP Tutorial | Javascript OOPS tutorial | Complete OOPS tutorial of Javascript

 JavaScript OOP Tutorial Overview JavaScript supports Object-Oriented Programming (OOP) principles through its prototype-based architecture. This tutorial will cover key concepts such as classes, objects, data abstraction, data encapsulation, polymorphism, and inheritance, providing step-by-step examples for each. Four Pillars of Object-Oriented Programming OOP languages adhere to four primary principles: Encapsulation : Combining data and methods within objects to ensure data security. Inheritance : Allowing classes to inherit properties and methods from parent classes, promoting code reuse and enabling method overriding. Polymorphism : Using the same function in different forms to reduce repetition and enhance code utility. Abstraction : Hiding complex implementation details to simplify usage. Is JavaScript Object-Oriented? To determine if JavaScript is object-oriented, we need to understand the difference between OOP and prototype-based programming. Object-Oriented Programming (...
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Difference between JS and Jquery

Difference between JS and Jquery Jquery is the Javascript plugin that provides a predefined library to contain predefined functionality. Jquery library has developed by Javascript means we can say that JS is the parent script and jquery is the child script. Jquery syntax pattern is different from Javascript, we can create even method and find element under the same block. for example, if we click on a button then we will create a click event method under Button Tag but in Jquery we will use click() under the jquery function. Step to create Jquery Hello World Program:- step1st:-  download Jquery Plugin and link into the head section <script src="jquery.min.js"></script> step2nd:-  create script section under <head></head> and write javascript code <script>     $(document).ready(function(){              alert("hello world");          }); </script> ...
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JavaScript ES6 Concept

It is used to provide additional features to JavaScript objects. JavaScript was created by Brendan Eich in 1995 and became an ECMA standard in 1997. ECMAScript is the official name of the language. ECMAScript versions have been abbreviated to ES1, ES2, ES3, ES5, and ES6. 1) let, const, and var The let keyword allows you to declare a variable with block scope. Example var a = 10; // Here a is 10 {   let a = 2;   // Here a is 2 } // Here a is 10 The const keyword allows you to declare a constant (a JavaScript variable with a constant value). Constants are similar to let variables, except that the value cannot be changed. var x = 10; // Here x is 10 {   const x = 2;   // Here x is 2 } // Here x is 10 Call back function in JavaScript:- A callback is a function passed as an argument to another function. Using a callback, you could call the calculator function (myCalculator) with a callback, and let the calculator function run the callback after the calculation is fini...
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Ajax in PHP

Ajax means asynchronous javascript and XML , it is used to partially update the content of web page excluding complete page means if we want to submit particular content of web forms then we can use ajax programming. google search engine is the best example of ajax when we press any key then respective data will be populated under text filed. Asynchronous means , if we perform operation simultaneously then it is called asynchronous. JavaScript or Jquery is used to handle an event of ajax form component. XML is used to send a request to the web server and get a response from the webserver. Xml use XMLHttpRequest object for request and XMLHttpResponse Object for response. ....................................................................................................................................... Program of Ajax:- Now we are creating an autosuggestion box using ajax means when the user will press s char then the respective data of s char  will be populated. Create Desig...
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