Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
Articles by Shubham Vora
Page 76 of 80
How to compare two numbers in JavaScript?
In this tutorial, we will learn to compare two numbers in JavaScript. If you are a competitive coder or application developer, in these cases, you need to make a comparison between two numbers and need to perform the particular operation basis on the comparison result of the numbers. Still, many programmers think we can compare the number only using the equality operator. Still, we can also compare the numbers using the less than or greater than operators. We will see the use of all three operators to compare the number in this tutorial. Using the Strict Equality Operator (===) In ...
Read MoreHow to check whether a value is a safe integer or not in JavaScript?
In this tutorial, we will learn to check whether a value is a safe integer or not in JavaScript. The simple definition of the safe integer in JavaScript is all numbers we can represent under the IEEE-754 double-precision number. It is the set of all numbers which lie between the -(2^53) to (2^53) exclusive, and we can represent it in the standard way. Here, we have different approaches to checking whether the number is a safe integer. Using the Number.IsSafeInteger() Method Using the if-else Conditional Statement Using the Number.isSafeInteger() Method In JavaScript, the isSafeInteger() method checks that type ...
Read MoreHow to check if a variable is boolean in JavaScript?
In this tutorial, we will learn to check if the variable is a Boolean in JavaScript. In JavaScript, if we match the two different variables with the same value and different data types using the equality operator, it returns a true value. It means if we compare a twovariable with the true value but different data types such as Boolean and string, it will generate a positive result. To overcome these problems, we need to check if the variable is of type Boolean or not before matching it with other values. Users can use the three methods below to check ...
Read MoreHow to check if a variable is an integer in JavaScript?
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 MoreHow to check if a JavaScript function is defined?
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 MoreHow to check for null, undefined, or blank variables in JavaScript?
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 MoreHow to change the value of an attribute in javascript?
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 MoreHow to change the font size of a text using JavaScript?
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 MoreHow to center the JavaScript alert message box?
In this tutorial, we will learn to center the JavaScript alert box. In JavaScript, an alert box is useful to show users some message, information, warning, success, etc. Let’s understand it by real-world example when you open any website on the web browser and start to authenticate by entering your username and password. When you click the submit button, it gives a message in an alert box like the password should of be 8 or more characters, or sign in successfully. Users can create the alert box using JavaScript's alert() method. Unfortunately, the default alert box doesn’t allow us to ...
Read MoreHow to change button label in alert box using JavaScript?
In this tutorial, we will learn to change the button label in the alert box using JavaScript. The alert box is one kind of popup box that is useful to show some important information to the user. We can pop up the alert box using JavaScript's alert() method. The default alert box contains the simple message and ok button, which pops out at the top center of the browser's screen. The default alert box with only messages and without any style looks weird. So, we need to make it stylish and change the style of the button and the label ...
Read More