In JavaScript, while working with the form elements, we need to validate the input fields and form elements when a user enters the value. In this tutorial, we will work with the file input. We will also learn to validate the file input. Sometimes, we may be required to ... Read More

Have you ever worked with the modal or seen it on any website? When you click outside the modal, it closes the modal. We must detect whether users have clicked on or outside the modal element in such cases. If users click outside the modal element, we need to close ... Read More

We may require to find the string, which contains only digits but not any other characters while developing. The easiest way to check can parse the numbers from the string and compare its length with the original string’s length. If both are the same, that means the string contains only ... Read More

In JavaScript, we can use the Date() object to create different timestamps. Also, we may be required to check if one date is between two using JavaScript. For example, we want to create a filter for orders in the eCommerce application based on the dates. So, we should be ... Read More

In this tutorial, we will learn to find the difference between two dates and check if the difference is less than one hour. Sometimes, developers must play with the Date object and perform some operation every hour. So, this can be one approach that checks if a particular operation is ... Read More

Sometimes, developers require to manage the HTML from JavaScript. For example, developers need to append some HTML nodes to a particular HTML element by accessing them in JavaScript. So, before we append an HTML string to any HTML element using JavaScript, we need to evaluate the string we are ... Read More

In JavaScript, when we divide any number by zero, we can get the infinity value. Also, developers can make a mistake in writing the mathematical expression which evaluates to Infinity. So, before we perform any operation with the returned value from the mathematical expression, we need to check if the ... Read More

Users can open multiple tabs in the browser, and they can also check if any particular tab is currently active or not in the browser. For example, if you have given a proctored test, you can observe that it detects that tab is changed whenever you change the tab in ... Read More

It never happens that you use JavaScript in developing your application, and you don’t use the Date object. The Date object is very important in JavaScript, which allows us to create and manipulate the date according to the developer’s requirements. In this tutorial, we will learn to check whether ... Read More

In JavaScript, the object is the most important data type, and we require its most of the time while developing the application with the JavaScript framework. Sometimes, we need to check whether an object is empty and perform the operation based on the object value. For example, you are ... Read More