Q1041. What is the easiest way to resize an array?
The length property of an array is useful to resize or empty an array quickly. Let's apply length property on number array to resize the number of elements from 5 to 2, `...
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Q1042. Does the statics object work with ES6 classes in React?
No, `statics` only works with `React.createClass()`: ```javascript someComponent = React.createClass({ statics: { someMethod: function () { // .. }, }, }); ``` But you ca...
Q1043. What is an observable?
An Observable is basically a function that can return a stream of values either synchronously or asynchronously to an observer over time. The consumer can get the value b...
Q1044. Why are inline ref callbacks or functions not recommended?
If the ref callback is defined as an inline function, it will get called twice during updates, first with null and then again with the DOM element. This is because a new ...
Q1045. What is the difference between function and class declarations?
The main difference between function declarations and class declarations is `hoisting`. The function declarations are hoisted but not class declarations. **Classes:** ```...
Q1046. What are HOC factory implementations?
There are two main ways of implementing HOCs in React. 1. Props Proxy (PP) and 2. Inheritance Inversion (II). But they follow different approaches for manipulating the _W...
Q1047. How to use class field declarations syntax in React classes?
React Class Components can be made much more concise using the class field declarations. You can initialize the local state without using the constructor and declare clas...
Q1048. Why do you not need error boundaries for event handlers?
Error boundaries do not catch errors inside event handlers. React doesn’t need error boundaries to recover from errors in event handlers. Unlike the render method and lif...
Q1049. What is deno?
Deno is a simple, modern and secure runtime for JavaScript and TypeScript that uses V8 JavaScript engine and the Rust programming language. It solves the inherent problem...
Q1050. What is the difference between try catch block and error boundaries?
Try catch block works with imperative code whereas error boundaries are meant for declarative code to render on the screen. For example, the try catch block used for belo...