Q751. How do you display data in a tabular format using console object?
The `console.table()` is used to display data in the console in a tabular format to visualize complex arrays or objects. ```js const users = [ { name: "John", id: 1, city...
Technical Question Bank · Peer-Reviewed
Job Interview Questions and Answers Directory
Search and filter frequently asked interview questions across technical, programming, and behavioral domains. Tailor your interview preparation by difficulty for freshers or experienced developers (963 available).
Active:
Tag: frontend ×
Q752. What will happen if you use props in initial state?
If the props on the component are changed without the component being refreshed, the new prop value will never be displayed because the constructor function will never up...
Q753. How do you verify that an argument is a Number or not?
The combination of IsNaN and isFinite methods are used to confirm whether an argument is a number or not. ```javascript function isNumber(n) { return !isNaN(parseFloat(n)...
Q754. How you use decorators in React?
You can _decorate_ your _class_ components, which is the same as passing the component into a function. **Decorators** are flexible and readable way of modifying componen...
Q755. How do you create copy to clipboard button?
You need to select the content(using .select() method) of the input element and execute the copy command with execCommand (i.e, execCommand('copy')). You can also execute...
Q756. What is CRA and its benefits?
**⚠️ OUTDATED:** Create React App (CRA) is no longer actively maintained and is not recommended for new projects as of 2024+. **Modern Alternatives:** Use **Vite** (for S...
Q757. What is the shortcut to get timestamp?
You can use `new Date().getTime()` to get the current timestamp. There is an alternative shortcut to get the value. ```javascript console.log(+new Date()); console.log(Da...
Q758. What is the lifecycle methods order in mounting?
The lifecycle methods are called in the following order when an instance of a component is being created and inserted into the DOM. 1. `constructor()` 2. `static getDeriv...
Q759. How do you flattening multi dimensional arrays?
Flattening bi-dimensional arrays is trivial with Spread operator. ```javascript const biDimensionalArr = [11, [22, 33], [44, 55], [66, 77], 88, 99]; const flattenArr = []...
Q760. What are the lifecycle methods going to be deprecated in React v16?
**⚠️ FULLY DEPRECATED:** These lifecycle methods have been deprecated and removed from React 17+. The following lifecycle methods were deprecated due to unsafe coding pra...