Q651. What is a conditional operator in javascript?
The conditional (ternary) operator is the only JavaScript operator that takes three operands which acts as a shortcut for `if` statements. ```javascript var isAuthenticat...
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Q652. Can you apply chaining on conditional operator?
Yes, you can apply chaining on conditional operators similar to **`if … else if … else if … else`** chain. The syntax is going to be as below, ```javascript function trac...
Q653. What are default props?
The _defaultProps_ can be defined as a property on the component to set the default values for the props. These default props are used when props not supplied(i.e., undef...
Q654. What are the ways to execute javascript after a page load?
You can execute javascript after page load in many different ways, 1. **window.onload:** ```javascript window.onload = function ... ``` 2. **document.onload:** ```javascr...
Q655. What is the purpose of displayName class property?
The displayName string is used in debugging messages. Usually, you don’t need to set it explicitly because it’s inferred from the name of the function or class that defin...
Q656. What is the browser support for react applications?
React supports all popular browsers, including Internet Explorer 9 and above, although some polyfills are required for older browsers such as IE 9 and IE 10. If you use *...
Q657. Can you give an example of when you really need a semicolon?
It is recommended to use semicolons after every statement in JavaScript. For example, in the below case (that is an IIFE = Immediately Invoked Function Expression) it thr...
Q658. What is code-splitting?
Code-Splitting is a feature supported by bundlers like Webpack and Browserify which can create multiple bundles that can be dynamically loaded at runtime. The react proje...
Q659. What is the freeze method?
The **`freeze()`** method is used to freeze an object. Freezing an object does not allow adding new properties to an object, prevents removing, and prevents changing the ...
Q660. What are Keyed Fragments?
The Fragments declared with the explicit syntax may have keys. The general use case is mapping a collection to an array of fragments as below, ```javascript function Glos...