JavaScript is the backbone of every website. It helps to manage user events and also handles browser operations. Sometimes we need to change the text of an element dynamically via user event like OnClick or OnHover event. At that time JavaScript and JQuery come in the role to handle the event. Here we are going […]
JavaScript
How to Check the Variable of Type Undefined or Null in JavaScript
In JavaScript, variables are of different types such as Boolean Undefined Null Number String Object Array, etc. You can declare a variable of the above types according to the requirements. Sometimes in code, you require to check the type of a variable, and based on the result, some further actions are taken. We have explained […]
JavaScript isArray() Function
What is isArray() function in Javascript ? The isArray() is a predefined function of javascript. It is used for checking wheater the input value is string or not. Syntax: Array.isArray(object) Explanation: An object parameter is a required field of function. Example 1 var social = [“facebook”,”Whatsapp”,”Instagram”]; console.log(Array.isArray(social)); Explanation: We first declare one array in variable […]
JavaScript insertBefore() Method
Sometimes we need to insert an element at a specific position, or we need to insert an element before any particular element. At that time we can use JavaScript insert before method. JavaScript insertBefore() method inserts a node at the specified position between HTML DOM elements. Also Read: JavaScript appendChild() Method Example Let’s consider we […]
JavaScript appendChild() Method
JavaScript appendChild() method appends the new HTML node as the last child of another HTML node. This method is used with JavaScript createElement() method. So if you don’t know how to use createElement() method in JavaScript Please read JavaScript createElement() method. Example 1 If we have a list in HTML and we want to add […]