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In JavaScript, the JSON.stringify() method is a useful tool that converts JavaScript objects into JSON strings. This is important when dealing with APIs, storing data, or transferring information between different systems. Knowing how to use JSON.stringify() helps developers manage data transformations in their applications. In this article, we will look at how JSON.stringify() works, its syntax, the parameters it uses, and some examples of how to use it well. The basic syntax for JSON.stringify() is as follows: JSON.stringify(obj, replacer, space) Let's understand the parameters used in JSON.stringify() syntax: obj: The JavaScript object to be ... Read More
The eval() function in JavaScript allows the execution of code stored as a string. It can be used to fetch specific values dynamically, but be careful, as it can have security risks and affect performance. This article will guide you on how to use eval() to get specific values and why you should generally avoid using eval(). How eval() Works? The eval() function takes a string as an argument and evaluates it as JavaScript code. For example: console.log(eval("2 + 2")); // Output: 4 Fetching Specific Values Using eval() The eval() function in JavaScript can be used to: ... Read More
JavaScript is a powerful tool for dynamically updating the Document Object Model (DOM) of a web page. The Document Object Model (DOM) is an important part of web development that allows changing the structure, content, and style of a webpage. This article explains how to update the DOM using different methods and provides examples. Understanding the DOM DOM stands for Document Object Model. The DOM represents a webpage as a tree structure, where each element is a node. JavaScript allows developers to select, modify, and manipulate these elements in real time, making web pages dynamic and interactive. Updating ... Read More
Let’s say the following is our HTML button −Click the button to add the input into the belowText BoxUse document.getElementById() to add a text in on button click. Following is the code −Example Live Demo Document Click the button to add the input into the below Text Box document.getElementById("clickButton").addEventListener("click", () =>{ document.getElementById("readTheInput").value += "JavaScript"; }); To run the above program, save the file name “anyName.html(index.html)” and right click on the file. Select the option “Open with Live Server” in VS Code editor.OutputThis will produce the following ... Read More
In this article, we will learn to hide an element when printing a web page in JavaScript and HTML. When printing a web page, you can suppress elements such as navigation menus, advertisements, and interactive elements that you do not require on paper and print only the required information. Different Approaches The Following are the two different approaches to hiding an element when printing a web page − Using CSS Media Query Using JavaScript to Hide Elements Before Printing Using CSS Media Query The most common and efficient method to ... Read More
The following are the differences between inline JavaScript and external files − External scripts An external JavaScript file is a separate .js file linked to an HTML document using the tag with the src attribute. The browser stores the external script once it is downloaded for the first time. If it is to be referenced again, then no additional download is needed. This reduces download time and size. The async and defer attributes have an effect. If these attributes are present the script will change the ... Read More
In this article, we will learn to create an alert by clicking an HTML button in JavaScript. JavaScript is extensively utilized to increase user interactions on web pages. One of the widespread usage scenarios is to display an alert on a button click. What is an Alert in JavaScript? An alert is a built-in JavaScript function that displays a small pop-up or a dialogue box window containing a message.The syntax for using an alert is alert("Your message here"); This function pauses the execution of the script until the user dismisses the alert by clicking the "OK" button. Creating an ... Read More
In this article, we will learn to create a TreeSet with a custom Comparator in Java. TreeSet is a set that stores elements in sorted order. By default, elements are sorted in natural ordering (numbers in ascending order). Understanding TreeSet and Comparators Following are some key points for TressSet and Comparators − A TreeSet is a part of the Java Collections Framework and implements the NavigableSet interface. It automatically sorts elements as they are added. By default, it sorts elements using their natural ordering (determined by the ... Read More
In this article, we will learn to get the location of an element in Java. In Java, an ArrayList is used for storing and manipulating dynamic collections of elements. When working with an ArrayList, you might need to find the index (position) of a specific element. What is the indexOf()? The location of an element in an ArrayList can be obtained using the method java.util.ArrayList.indexOf(). This method returns the index of the first occurrence of the element that is specified. If the element is unavailable in the ArrayList, then this method returns -1. Syntax int index = arrayList.indexOf(element); Finding the ... Read More
The decrement operator in Javascript decreases an integer value by one. This operator is often utilized in loops, counters, and mathematical computations where a value has to be decreased sequentially. Types of Decrement Operators The decrement operator (--) can be used in two ways − Post-decrement (x--): It provides the current value of the variable prior to its decrement. Pre-decrement (--x): It first decreases the value and then returns the variable's new value. Syntax x--; // Post-decrement --x; // Pre-decrement Example Below is an example where the value of ... Read More