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10 JavaScript interview questions with solutions and code How do you check if a variable is an array? Solution: function isArray(variable) { return Array.isArray(variable); } What is the difference between null and undefined in JavaScript? Solution: null is an intentional absence of any object value and is often used to indicate a deliberate non-value. undefined … Read more
JavaScript Components Web Dev JavaScript Components Web Dev Accordion Component: An accordion component is a UI element that allows users to expand and collapse sections of content. Here’s an example implementation of an accordion component: <div class=”accordion”> <div class=”accordion-header” onclick=”toggleAccordion(event)”> Header 1 </div> <div class=”accordion-content” style=”display: none;”> Content 1 </div> <div class=”accordion-header” onclick=”toggleAccordion(event)”> Header 2 … Read more
Guide to JavaScriptJavaScript is a high-level, dynamic, and interpreted programming language. It is used to add interactivity and other dynamic elements to websites. The console in JavaScriptVariables:JavaScript CommentsData Types:JavaScript Data TypesArithmetic Operations:Conditional Statements:Functions:JavaScript Loops:JavaScript ArraysJavaScript ObjectsHow to output a table into the consoleJavaScript String MethodsJavaScript Number MethodsJavaScript MathVariables:Arrays:Example : ArrayExample: ObjectObjects:Conditional Statements:Functions:Example: Simple FunctionExample: Conditional … Read more
JavaScript Coding Examples Variables: Arrays: Example : Array Example: Object Objects: Conditional Statements: Functions: Example: Simple Function Example: Conditional Statement String Methods: Ternary Operators: Using if statements: Using the switch statement: Example of switch statements: Using an object to store data: Using a function to define a reusable piece of code: Anonymous Functions: Arrow Functions: … Read more
Frontend code refers to the code that runs in the client-side of a web application, specifically the part of the application that is visible and interacts with the user. It includes HTML, CSS, and JavaScript, which work together to display the content, style, and functionality of a website. Together, HTML, CSS, and JavaScript form the … Read more
Learn JavaScript Code Examples Coding Tips Basics of JavaScript Code JavaScript is a high-level, dynamic, and interpreted programming language. It is used to add interactivity and other dynamic elements to websites. The console in JavaScript The console in JavaScript is a tool used for debugging and testing purposes. It allows developers to log information to … Read more
Tips for writing better JavaScript code, along with code samples and explanations: Use let and const instead of var Use let and const instead of var: Use let and const instead of var to declare variables in JavaScript. This helps to avoid variable hoisting and scope issues. Example: // using let let name = ‘John … Read more
JavaScript interview questions with code examples closure in JavaScript What is closure in JavaScript and how can it be used to create private variables? A closure is a function that has access to variables in its outer scope, even after the outer function has returned. Closures can be used to create private variables in JavaScript … Read more
https://www.linkedin.com/pulse/javascript-use-destructuring-get-values-from-arrays-objects-svekis- Destructuring is a feature in JavaScript Use Destructuring to get values from arrays Make use of destructuring to extract values from arrays and objects into variables: // Destructuring arrays const colors = [‘red’, ‘green’, ‘blue’]; const [first, second, third] = colors; // Destructuring objects const person = { name: ‘John Doe’, age: 30, job: … Read more
Use forEach over for loop Prefer forEach over for loop for simple iterations: const numbers = [1, 2, 3, 4, 5]; numbers.forEach(number => console.log(number)); The forEach method is called on the numbers array. The first argument to forEach is a callback function, which is executed for each element in the array. The callback function takes … Read more