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Articles by Rushi Javiya
Page 4 of 14
How to Validate Mobile Number Length in ReactJS?
Nowadays, validation of mobile number input is a required feature for any application, and it requires validation of the length of the mobile number. Many apps use the mobile number for authentication purposes, sending OTP to users' mobile numbers for successful authentication. If the user enters the wrong mobile number, the app can face issues with sending OTP. So, before the user submits the mobile number for registration or authenticates the app, our app should validate the length of the mobile number. This tutorial will teach us various approaches to validating a mobile number using ReactJs. ...
Read MoreHow to check two elements are the same using jQuery/JavaScript?
We can access HTML elements using various methods in vanilla JavaScript or jQuery. Sometimes, after accessing DOM elements, developers need to check if both accessed elements are the same or not. In this tutorial, we will learn to use JavaScript's strict equality operator and jQuery's is() method to check the equality of two HTML elements. Using the Equality Operator (===) in JavaScript We can access HTML elements using methods like getElementById, querySelector, getElementsByClassName, etc. After storing elements in JavaScript variables, we can compare them using the strict equality operator (===). Syntax if (element1 === element2) ...
Read MoreHow to check whether an array is a subset of another array using JavaScript?
The first array is the subset of the second array if the second array contains all elements of the first array. So, sometimes we may be required to check if one array is the subset of another. In this tutorial, we will learn to check if one array is a subset of another array using three different approaches. Using the for loop and array.includes() method Users can use the for loop to iterate through every element of the first array. After that, they can use the includes() method to check if the second array contains every element ...
Read MoreHow to check whether an object exists in JavaScript?
The object contains the properties and their values in JavaScript. We can create an object using the curly ({}) braces. It's similar to the variables, but we assign an object value rather than assigning the number, string, or boolean value to the variable. So, here we will learn to check if the object exists in JavaScript in this tutorial. In short, we have to learn ways to check the existence of object variables. Using the try-catch Statement Generally, we use the try-catch statement to handle errors in JavaScript. We can try to access the object or its ...
Read MoreCan JavaScript be used for Android Development?
JavaScript has become a powerful option for Android app development through hybrid frameworks and cross-platform solutions. While not traditionally used for native Android development, JavaScript enables developers to create mobile applications that run on Android devices using web technologies. Modern JavaScript frameworks like React Native, Ionic, and Cordova allow developers to build Android apps using familiar web development skills. This approach combines the accessibility of JavaScript with the functionality of mobile applications. How JavaScript Works for Android Development JavaScript can be used for Android development through several approaches: Hybrid Apps: Web applications ...
Read MoreHow to choose a background color through a color picker in JavaScript?
While working with HTML and CSS to create a web page, we require to choose a color from the color picker. Also, sometimes we may require to select the background color through the color picker input. In this tutorial, we will learn different approaches which allow users to choose a background color from the color-picker input, and when the user selects a new color, it should change the background color. Using the Color Picker with Button Click In HTML, color picker input allows users to choose a color from that. We can get a selected color value ...
Read MoreHow to assign a PHP variable to JavaScript?
PHP and JavaScript run at different times in the web development lifecycle. PHP executes on the server before sending HTML to the browser, while JavaScript runs in the browser after receiving the page. This tutorial shows various methods to pass PHP variable values to JavaScript. Understanding the execution sequence is crucial: PHP processes your .php file first to generate HTML, then sends the processed code to the client's browser. Once in the browser, JavaScript executes, but PHP is no longer accessible. Using Echo (Direct Assignment) The simplest method is using PHP's echo to output PHP variables directly ...
Read More10 Interesting things you can do with a few lines of JavaScript
In this tutorial, let us discuss some fascinating things that a few lines of JavaScript can do. Almost every website uses JavaScript. JavaScript was born in 1995, and it is a programming language similar to other languages, but it runs faster because it doesn't have many predefined functions. JavaScript can create programs, libraries, and scripts for websites or desktop applications. A lot of web developers are also good at writing JavaScript. Some JavaScript codes are fascinating if you observe how it behaves. Let us discuss what are these fascinating things in JavaScript. 1. Fascinating Things About Semicolons ...
Read MoreExplain sub-classes and inheritance in ES6
In JavaScript, developers used prototypes for inheritance in ES5. ES6 introduced classes, making inheritance syntax cleaner and more familiar to developers from other programming languages. What are Sub-classes and Inheritance? A subclass is a child class that inherits properties and methods from a parent class (superclass). Inheritance allows you to create new classes based on existing ones, promoting code reuse and establishing hierarchical relationships between classes. The subclass automatically inherits all properties and methods from the superclass and can access them through its objects. You use the extends keyword to create inheritance relationships. Syntax ...
Read MoreExplain the purpose of the 'in' operator in JavaScript
This tutorial will teach about the 'in' operator in JavaScript. There are many operators available in JavaScript, such as arithmetic operators to perform mathematical operations, assignment operators, equality operators, etc. The 'in' operator is also one of them, which we can use to find properties from the object. Before we start, let me ask you a question. Have you ever needed to check for the existence of the object's properties while coding with JavaScript? If yes, how did you deal with it? The answer is simple you can use the 'in' operator, which returns the Boolean value based on ...
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