Q1061. 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...
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Q1062. 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...
Q1063. What is the use of the blur function?
In JavaScript, the `blur()` function is used to remove the focus from a specific element on a web page. When an element has focus, it typically means that it is selected ...
Q1064. What is the difference between an alert box and a confirmation box?
An alert box is a simple message box with an OK button for displaying information, while a confirmation box allows users to confirm or cancel an action with OK and Cancel...
Q1065. What is `prompt()` in JavaScript?
`prompt()` is a built-in JavaScript function that displays a dialog box to the user with a message, an input field, and OK/Cancel buttons. It allows the user to input dat...
Q1066. When to Use Internal and External JavaScript Code?
If you have only a few lines of code that is specific to a particular webpage. In that case, it is better to keep your JavaScript code internal within your HTML document....
Q1067. What is npm?
NPM(Node Package Manager) is a helpful tool for developers that makes working with JavaScript easier. It's like a big library where they can find ready-to-use code and ea...
Q1068. What is the name of the file which npm uses to identify the project and its dependencies?
The file that npm uses to identify the project and its dependencies is called "package.json". It serves as a configuration file where developers can specify information a...
Q1069. What is the difference between dependencies and devDependencies?
Both are defined in the `package.json`. dependencies lists the packages that the project is dependent on. devDependencies lists the dependencies which are only required d...
Q1070. What is a non-blocking function?
A non-blocking function, also known as an asynchronous function, is a type of function that does not block the execution of other code while it is running. Instead of wai...