Q601. How do you trim a string at the beginning or ending?
The `trim` method of string prototype is used to trim on both sides of a string. But if you want to trim especially at the beginning or ending of the string then you can ...
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Q602. What is the output of below console statement with unary operator?
Let's take console statement with unary operator as given below, ```javascript console.log(+"Hello"); // NaN ``` The output of the above console log statement returns NaN...
Q603. Does javascript uses mixins?
JavaScript does not have built-in support for mixins as a formal language feature. However, developers commonly implement mixins using various patterns to enable code reu...
Q604. Mixin Example using Object composition
```javascript // Define a mixin const canEat = { eat() { console.log("Eating..."); } }; const canWalk = { walk() { console.log("Walking..."); } }; const canRead = { read(...
Q605. Benefits
- Avoids deep inheritance hierarchies - Encourages composition over inheritance - Promotes reusable and modular code Modern JavaScript favors mixin alternatives like comp...
Q606. What is a thunk function?
A thunk is just a function which delays the evaluation of the value. It doesn’t take any arguments but gives the value whenever you invoke the thunk. i.e, It is used not ...
Q607. What are asynchronous thunks?
The asynchronous thunks are useful to make network requests. Let's see an example of network requests, ```javascript function fetchData(fn) { fetch("https://jsonplacehold...
Q608. What is the output of below function calls?
**Code snippet:** ```javascript const circle = { radius: 20, diameter() { return this.radius * 2; }, perimeter: () => 2 * Math.PI * this?.radius, }; ``` ```javascript con...
Q609. How to bind methods or event handlers in JSX callbacks?
There are 3 possible ways to achieve this in class components: 1. **Binding in Constructor:** In JavaScript classes, the methods are not bound by default. The same rule a...
Q610. How to remove all line breaks from a string?
The easiest approach is using regular expressions to detect and replace newlines in the string. In this case, we use replace function along with string to replace with, w...