Q901. Why is Redux Toolkit recommended over Redux?
**Redux Toolkit (RTK)** is the official, opinionated way to write Redux logic today. It's built on top of plain Redux and re-exports its APIs, but wraps them with utiliti...
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Q902. Can I avoid using postMessages completely?
You cannot avoid using postMessages completely(or 100%). Even though your application doesn’t use postMessage considering the risks, a lot of third party scripts use post...
Q903. What is the difference between client state and server state?
**Client state** is data that lives entirely in the browser and is owned by the UI — it doesn't need to be synchronized with a backend. **Server state** is data that actu...
Q904. Is postMessages synchronous?
The postMessages are synchronous in IE8 browser but they are asynchronous in IE9 and all other modern browsers (i.e, IE9+, Firefox, Chrome, Safari).Due to this asynchrono...
Q905. How do you prevent unnecessary Redux re-renders?
By default, `useSelector` re-renders a component whenever the **selected value's reference** changes between renders (it uses strict `===` comparison). Most unnecessary r...
Q906. What paradigm is Javascript?
JavaScript is a multi-paradigm language, supporting imperative/procedural programming, Object-Oriented Programming and functional programming. JavaScript supports Object-...
Q907. What is `createSelector`?
`createSelector` (from **Reselect**, which Redux Toolkit re-exports) creates **memoized selectors**. It takes one or more "input selectors" and a "result function", and o...
Q908. What is Python String format and Python String replace?
Python String Format: The String format() method in Python is mainly used to format the given string into an accurate output or result. Syntax for String format() method:...
Q909. What is the difference between internal and external javascript?
**Internal JavaScript:** It is the source code within the script tag. **External JavaScript:** The source code is stored in an external file(stored with .js extension) an...
Q910. What is normalized Redux state?
**Normalized state** stores data the way a relational database would: each type of entity is kept in a lookup table keyed by ID, instead of being nested/duplicated inside...