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In this tutorial, we will learn to check if the variable is NaN in JavaScript. The full form of the NaN is ‘not a number’. The NaN is the reserved keyword in the JavaScript which we can assign to the variable. If users are using the below method to check whether a variable is a number or not, it will not work. var a = "Hello"; let result = a == NaN; // it always returns false. As we have talked that the above method will not work to check for a number because NaN is the reserved keyword. ... Read More
In this tutorial, we will learn to check if a variable is an integer in JavaScript. Before we solve the problem, we must have a problem. We can ask ourselves, “why do we need to check if the variable is an integer?”. Let’s understand the answer using a single example. Suppose, we are taking the value from the user using the input text box. It returns the values in the string format, and now think that we are adding values. Will we get the correct result? Obviously, not. So, in such cases, we need to check if the variable is ... Read More
In this tutorial, we will learn to check whether the JavaScript function is defined or not. If a programmer calls the JavaScript function without defining it, they will see the reference error with the message like “function is not defined.” To overcome the problem, the programmer can check whether the function is defined and call the function. We will look at the various approaches to check if the function is defined or not in JavaScript below. Using the typeof Operator In JavaScript, the typeof operator is useful to check the type of the variable, function, objects, etc. When we use ... Read More
In this tutorial, we will learn to check for null, undefined, or blank variables in JavaScript. There is no particular built-in library function to check whether a variable is undefined or null. Still, we can use some operators such as typeof operator and equality operator to check the variable. Before we proceed with the tutorial, let’s clear the doubt between the null, undefined, or blank variable. Null VS Undefined We can say that the Null and undefined variables are almost the same but not identical. Undefined variable − It is a variable not declared in the program, and the ... Read More
In this tutorial, we will learn to change the value of an attribute in JavaScript. To build web applications, the most programmer uses three languages. HTML, CSS, and JavaScript. The HTML is used to create the base for the web page, CSS for styling, and JavaScript adds the dynamic behaviours to the web page. Users have seen on many websites that it changes the element's style when they just click on the button. We can make it happen using JavaScript. Using JavaScript, let’s look at setting the new attribute for the HTML element or changing the attribute values dynamically. To ... Read More
In this tutorial, programmers will learn to change the font size of the text using JavaScript. Many application allows users to change the font size according to users’ requirement. We need to change the default font size using JavaScript to achieve that. Before we move ahead with the tutorial, let’s learn what values we can assign to the fontsize. Different values users can assign to the font size We can assign the below values to the font size of any element. Every values changes the font size differently which we have explained here. xx-large | x-large | large | ... Read More
A cloud access security broker (CASB) is a software that resides between a cloud service customer and a cloud service provider on-premises or in the cloud. When data stored in the cloud is accessible, it acts as a tool for enforcing an organization's security standards through risk identification and legal compliance. The trustworthiness of this watchdog tool to block malware and other dangers from penetrating a system and prevent data theft helps boost confidence in using cloud services in general. Customers of cloud services have already experienced benefits from using it. In fact, it's one of the most crucial improvements ... Read More
Server Message Block (SMB) A client/server protocol called SMB (Server Message Block) controls access to files, whole directories, and other network resources, including printers, routers, and network interfaces. The SMB protocol may be used to handle information sharing between the various processes in a system, sometimes referred to as inter-process communication. The protocol was created in 1983 by IBM's IT division, and throughout the years, it has undergone several revisions and implementations. SMB was initially made accessible to the general public as a feature of the OS/2 LAN Manager and LAN Server network operating systems. Since the Windows operating system ... Read More
Romance scams happen when scammers create a false online person to win the victim's love and trust. The con artist then manipulates the victim and steals from them under the guise of a loving or close relationship. Romance scammers are professional at what they do and will appear sincere, compassionate, and believable. The majority of social networking and dating websites host con artists. The goal of the con artist is to become friendly with the victim as soon as possible, win her favor, and acquire her trust. Scammers may make preparations to meet in person and propose marriage, but ... Read More
LockBit ransomware is harmful malware meant to prevent users from accessing computer systems unless a ransom is paid. LockBit will automatically disseminate the infection over the network, look for valuable targets, and encrypt any accessible computer systems. Highly specific assaults against businesses and other organizations utilize this malware. LockBit attackers have created a name for themselves by posing the following threats to businesses around the world − Essential operations are interrupted, and they abruptly stop. The hacker is engaging in extortion for personal benefit. If the victim does not cooperate, blackmail tactics include data theft and unauthorized dissemination. ... Read More