Top 100 JavaScript Interview Questions and Answers in 2023: Thread [Part 3]:

Here's part 1 of this JS Interview Questions threads series: twitter.com/codedamncom/st…

Here's part 2 of this JS Interview Questions threads series: twitter.com/codedamncom/st…

Part 3 starts here:

Q21. What is NaN in JavaScript? NaN is an abbreviation for “Not a Number.” It represents a value that is not a valid number in JavaScript.

Q22. What is debouncing in JavaScript? The debouncing technique prevents a function from being called again until a particular time has passed since the last call. Its primary application is in Web application search functionality. The API is called only once per user input.

Q23. How to get the type of a variable? To know the type of a JavaScript variable, we can use the typeof operator.

Q24. Explain the call(), apply(), and bind() methods. The call() method invokes a function with the specified context and parameters.

The apply() method invokes a function with the context specified and the arguments provided as an array (or an array-like object). It is similar to call(), except that it accepts parameters in the form of an array.

The bind() method generates a new function that, when called, has this keyword set to the specified context, with a sequence of arguments preceding it. It’s similar to call(), except instead of calling the function directly, it returns a copy of the new function.

Q25. What are the three types of JavaScript errors?