Q2681. What's the difference between Native objects and Host objects?
Native objects are objects that are part of the JavaScript language defined by the ECMAScript specification, such as String, Math, RegExp, Object, Function, etc on the ot...
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Q2682. What's a typical use case for anonymous functions?
Anonymous functions are functions that are not bound to a name. They are often used as inline functions, or as arguments to other functions. One typical use case for anon...
Q2683. What is negative Infinity?
In JavaScript, **`-Infinity`** is a numeric value representing negative infinity within the IEEE 754 floating-point standard. It is lower than any other representable num...
Q2684. What is the data type of variables in JavaScript?
In JavaScript, **variables themselves do not have fixed types; values have types**. JavaScript is a dynamically and weakly typed language, meaning a variable declared wit...
Q2685. What is the difference between a prototype and an instance?
A prototype is a blueprint for creating objects. An instance is an object that is created from a prototype. Instances inherit properties and methods from their prototypes...
Q2686. What is a function expression?
A function expression in JavaScript is a way to define a function by assigning it to a variable. Instead of using the traditional function declaration syntax, a function ...
Q2687. What is the difference between a module and a library?
A module is a self-contained unit of code that can be imported into another program. A library is a collection of modules that can be used to perform a specific task. Mod...
Q2688. How are JavaScript and ECMA Script related?
**ECMAScript (ES)** is the official open standard and specification (managed by Ecma International and the TC39 committee), while **JavaScript (JS)** is the commercial pr...
Q2689. What are the different ways to delete a variable in JavaScript?
We can delete a variable and remove it from memory in the following ways: 1. Using the `delete` keyword: ``` let x = 10; console.log(x); // Output: 10 delete x; console.l...
Q2690. What are the different types of errors in JavaScript?
There are three types of errors: 1. Load time errors: Errors that come up when loading a web page, like improper syntax errors, are known as Load time errors and generate...