Overview The extraction of colors from an image means that the colors which are present in an image in the form of pixels will be extracted, and an average of the pixels of the distinct is calculated in the form of RGB (Red Green Blue) and a new average color will be formed on the basis of the average of the color pixels. So we can achieve this with the help of JavaScript, in the JavaScript there is a property "canvas" which is used to draw an image or any content in the form of pixels. Approach To build this ... Read More

Overview An object in JavaScript is defined as a set of key−value pairs. It is used to define the properties of a single object. So to filter the object depending on the field's value can be achieved using JavaScript. By using the if−else condition we can filter the object depending on the value. So to filter from the object, first we have access to the key from the object, so for this we should have some prior knowledge of the object and its manipulation. As the manipulation of the object plays an important role in filtering the field value of ... Read More

Overview A nested object in JavaScript is a simple object enclosed within the curly brackets, and to make a nested object an object is to inherit its own object. So to filter the object in JavaScript, JavaScript has provided its own method named "filter()", this filter() method takes the argument as a callback function in which a condition is returned at which the given array object will be filtered. So to achieve this filter task we will have to create a simple object as we create in other programming languages and then we will inherit some key value in the ... Read More

Overview An object in JavaScript is a set of the data that is contained inside the curly braces in the key value pair form. An object in JavaScript is created by using the curly braces and defining the set of data inside it. A nested JSON object is also a set of a key value pair but in nested the key contains a set of objects inherited in it. We can use the two formats of accessing the value in the JSON objects: the first method is by directly accessing the value and the second method is by using the ... Read More

JavaScript is a famous programming language that is one of the core languages of the World Wide Web (WWW) alongside HTML and CSS. It allows the programmer to capture events and modify the Document Object Model (DOM). In this article we are going to see how we can make use of JavaScript to change the background color according to the location of the mouse cursor. Mousemove Event The mousemove is an event which gets fired at an element when the cursor of the mouse is moved, and it is still inside the element of concern. It gives us information about ... Read More

jQuery is a JavaScript library created to make event handling, CSS animation, Ajax, and DOM tree navigation and manipulation easier. In this article we are going to see how we can change the name of an element using jQuery. Algorithm We are going to follow a three−way procedure to change the name of any element using jQuery: Identify and select the element we want to change. Copy all the attributes of the selected element to a temporary object. Create a new element with the new name and copy all the attributes to it. Replace the old element with this ... Read More

JavaScript is a famous programming language that is one of the core languages of the World Wide Web (WWW) alongside HTML and CSS. It allows the programmer to capture events and modify the Document Object Model (DOM). In this article we are going to see how we can make use of JavaScript to change the text of the button whenever it is clicked with the help of localStorage. localStorage The localStorage is a read−only property of the window interface that allows the user to store data. The saved information is kept between browser sessions. The localStorage property is like sessionStorage, ... Read More

JavaScript is a famous programming language that is one of the core languages of the World Wide Web (WWW) alongside HTML and CSS. It allows the programmer to capture events and modify the Document Object Model (DOM). In this article we are going to learn how we can catch all JavaScript errors and send them to the server. What is onerror? onerror is an event that is fired whenever an error occurs while loading an external file or resource or some error occurs while executing a script. Syntax onerror = (event, source, lineno, colno, error) => {}; Parameters: The ... Read More

JavaScript is a famous programming language that is one of the core languages of the World Wide Web (WWW) alongside HTML and CSS. It allows the programmer to capture events and modify the Document Object Model (DOM). In this article we are going to see how we can catch ReferenceError with the help of onerror event. What is ReferenceError? A ReferenceError is a form of error that may occur when the program tries to access a variable or object that doesn't exist. This can occur when a variable's name is spelled incorrectly or when the user attempts to access an ... Read More

In this tutorial, we will look at two approaches to change the image color randomly using HTML, CSS and JavaScript. Approach 1: Using Math.random() Function We will begin by writing the HTML code and use the tag to select the target image. Then we will apply some basic some basic styles using CSS properties. In order to select colors randomly, we have to use the JavaScript Math.random() function. Math.random() generates a number at random between 0 (inclusive) and 1 (exclusive). To change the color of the image, we will use event listeners. The event listener is used to change ... Read More