Q231. How do you parse JSON string?
When receiving the data from a web server, the data is always in a string format. But you can convert this string value to a javascript object using parse() method. ```ja...
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Q232. What is the purpose of the constants in Redux?
Constants allows you to easily find all usages of that specific functionality across the project when you use an IDE. It also prevents you from introducing silly bugs cau...
Q233. Why do you need JSON?
When exchanging data between a browser and a server, the data can only be text. Since JSON is text only, it can easily be sent to and from a server, and used as a data fo...
Q234. What are the different ways to write `mapDispatchToProps()`?
There are a few ways of binding _action creators_ to `dispatch()` in `mapDispatchToProps()`. Below are the possible options: ```javascript const mapDispatchToProps = (dis...
Q235. What are PWAs?
Progressive web applications (PWAs) are a type of mobile app delivered through the web, built using common web technologies including HTML, CSS and JavaScript. These PWAs...
Q236. What is the use of the `ownProps` parameter in `mapStateToProps()` and `mapDispatchToProps()`?
If the `ownProps` parameter is specified, React Redux will pass the props that were passed to the component into your _connect_ functions. So, if you use a connected comp...
Q237. What is the purpose of clearTimeout method?
The clearTimeout() function is used in javascript to clear the timeout which has been set by setTimeout()function before that. i.e, The return value of setTimeout() funct...
Q238. How to structure Redux top level directories?
Most of the applications has several top-level directories as below: 1. **Components**: Used for _dumb_ components unaware of Redux. 2. **Containers**: Used for _smart_ c...
Q239. What is the purpose of clearInterval method?
The clearInterval() function is used in javascript to clear the interval which has been set by setInterval() function. i.e, The return value returned by setInterval() fun...
Q240. What is redux-saga?
`redux-saga` is a library that aims to make side effects (asynchronous things like data fetching and impure things like accessing the browser cache) in React/Redux applic...