Q421. What is the purpose of uneval?
The `uneval()` is an builtin function which is used to create a string representation of the source code of an Object. It is a top-level function and is not associated wi...
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Q422. How to add Bootstrap to a react application?
Bootstrap can be added to your React app in a three possible ways, 1. Using the Bootstrap CDN: This is the easiest way to add bootstrap. Add both bootstrap CSS and JS res...
Q423. How do you encode an URL?
The `encodeURI()` function is used to encode complete URI which has special characters except (, / ? : @ & = + $ #) characters. ```javascript var uri = "https://mozilla.o...
Q424. Can you list down top websites or applications using react as front end framework?
Below are the `top 10 websites` using React as their front-end framework, 1. Facebook 2. Uber 3. Instagram 4. WhatsApp 5. Khan Academy 6. Airbnb 7. Dropbox 8. Flipboard 9...
Q425. How do you decode an URL?
The `decodeURI()` function is used to decode a Uniform Resource Identifier (URI) previously created by `encodeURI()`. ```javascript var uri = "https://mozilla.org/?x=шелл...
Q426. Is it recommended to use CSS In JS technique in React?
React does not have any opinion about how styles are defined but if you are a beginner then good starting point is to define your styles in a separate \*.css file as usua...
Q427. How do you print the contents of web page?
The `window` object provides a `print()` method which is used to print the contents of the current window. It opens a Print dialog box which lets you choose between vario...
Q428. Do I need to rewrite all my class components with hooks?
No. But you can try Hooks in a few components(or new components) without rewriting any existing code. Because there are no plans to remove classes in ReactJS.
Q429. What is the difference between uneval and eval?
The `uneval` function returns the source of a given object; whereas the `eval` function does the opposite, by evaluating that source code in a different memory area. Let'...
Q430. What is useEffect hook? How to fetch data with React Hooks?
The `useEffect` hook is a React Hook that lets you perform **side effects** in function components. Side effects are operations that interact with the outside world or sy...