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Articles by Disha Verma
Page 3 of 5
JavaScript input type=submit is not working?
The input type submit is not working is one of the common issues that developers face while working with JavaScript forms. To make it work properly, you need to handle form events correctly or prevent the default browser behavior when necessary. This article examines common reasons why a submit button might not work in JavaScript and provides practical solutions to resolve these issues. Common Reasons for Submit Button Issues The following are some common reasons that may lead to this issue: Missing Event Listener − If you haven't added an event ...
Read MoreRemoving all non-alphabetic characters from a string in JavaScript
Non-alphabetic characters are any characters that are not part of the alphabet, and the strings are a data type that represents a sequence of characters or text. Working with strings is a basic task in JavaScript, and one common task is removing all non-alphabetic characters from a string. In this article, we will understand how to remove all non-alphabetic characters from a string. Understanding the Problem Suppose we have a string saying "he@656llo wor?ld". We want to remove all digits, punctuation, whitespace, and special characters from the given string. For example: Input string we have: "he@656llo wor?ld" ...
Read MoreJavaScript - Check if value is a percentage?
To check the value for percentage, use a regular expression. When dealing with user input or processing data in JavaScript, it's important to make sure a value is a valid percentage. This article shows you how to check if a value is a percentage using JavaScript, highlighting a useful method that involves regular expressions. Let's say the following is our value: var value = "97%"; To check the value for percentage, we are using a regular expression that matches numbers followed by the % symbol. Using Regular Expression The best way to check ...
Read MoreJavaScript Sum of two objects with same properties
In JavaScript, summing two objects with identical properties is a common task when working with data aggregation. This involves creating a new object where each property's value is the sum of corresponding values from the input objects. In JavaScript, objects are data structures that store key-value pairs. When you have multiple objects with the same property names, you often need to combine their values mathematically. Understanding the Problem When you have two objects with the same property names, the goal is to create a new object where each property's value is the sum of the matching values ...
Read MoreHow to find specific words in an array with JavaScript?
Finding specific words in an array is a common task in JavaScript, especially when you need to filter data, search through lists, or analyze text. An array is a simple and fundamental data structure in JavaScript that stores multiple values of the same data type. JavaScript has several built-in methods, like includes(), filter(), and find(), that help you search for specific words easily. This article will explain these methods with examples. Finding Specific Words in an Array Finding specific words in an array can be done in the following ways: Using includes() ...
Read MoreJavaScript fetch a specific value with eval()?
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 console.log(eval("'Hello' + ' World'")); // Output: Hello World 4 Hello World ...
Read MoreJavaScript program to update DOM
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. ...
Read MoreJavaScript code to find nth term of a series - Arithmetic Progression (AP)
To find the nth term of an arithmetic progression in JavaScript, we need to write a function that calculates the nth term using the AP formula. In this article, we will explore how to find the nth term of an AP using JavaScript. We are required to write a JavaScript function that takes three parameters: the first two consecutive terms of an arithmetic progression, and the position n of the term we want to find. If the input is 2, 5, 7 (first term = 2, second term = 5, position = 7): Then the series will ...
Read MoreJavaScript code to extract the words in quotations
Extracting text enclosed in quotation marks is a common task in programming, especially when working with strings that include quotes. In JavaScript, strings are a data type used to represent text. A string is a sequence of characters enclosed in single quotes ('), double quotes ("), or backticks (`). JavaScript provides multiple ways to extract text enclosed in quotation marks. This article explains how to extract words or phrases inside quotations from a string efficiently using different approaches. Methods to Extract Quoted Text Extracting text enclosed in quotation marks can be done in the following ways: ...
Read MoreJavaScript to push value in empty index in array
To push value in an empty index in an array, we can create a custom method that finds the first empty slot and fills it, or appends to the end if no empty slots exist. Arrays in JavaScript can have empty slots (also called sparse arrays) where certain indexes are undefined. When working with such arrays, you might need to fill these gaps before adding new elements at the end. Understanding Empty Slots in Arrays Empty slots occur when you skip indexes during array creation or deletion: const arr = [1, 2, , 4, , ...
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