Category: JavaScript

  • How Can I Determine If a Variable Is ‘undefined’ or ‘null’?

    When working with JavaScript, it is important to be able to determine if a variable is ‘undefined’ or ‘null’. This can be useful for handling different scenarios and avoiding errors in your code. In this blog post, we will explore different ways to check if a variable is ‘undefined’ or ‘null’. Using the typeof Operator…

  • Set a Default Parameter Value for a Javascript Function

    When working with JavaScript functions, it is often useful to set default parameter values. This allows you to define a default value for a parameter if no value is provided when the function is called. In this blog post, we will explore different ways to set a default parameter value for a JavaScript function. Method…

  • How to Format a Number with Commas as Thousands Separators?

    When working with numbers in JavaScript, it is often necessary to format them in a specific way to improve readability. One common formatting requirement is to add commas as thousands separators. In this blog post, we will explore different solutions to achieve this formatting in JavaScript. Solution 1: Using the toLocaleString() method The easiest way…

  • Validate Decimal Numbers in Javascript – Isnumeric()

    When working with user input in JavaScript, it is important to validate the data to ensure it meets the required format. One common validation task is to check if a given input is a valid decimal number. In JavaScript, there is no built-in function to directly check if a string is a valid decimal number.…

  • Disable/Enable an Input with Jquery?

    Disabling or enabling an input field using jQuery is a common requirement in web development. In this blog post, we will explore different ways to achieve this functionality. Method 1: Using the prop() method The prop() method is used to set or return properties and values of the selected elements. To disable an input field…

  • Get Selected Text from a Drop-down List (Select Box) Using Jquery

    As a tech professional, you may often come across the need to get the selected text from a drop-down list (select box) using jQuery. In this blog post, we will explore different solutions to achieve this. Solution 1: Using the .val() method The simplest and most straightforward way to get the selected text from a…

  • How Do I Chop/Slice/Trim off Last Character in String Using Javascript?

    When working with strings in JavaScript, you may come across a situation where you need to remove the last character from a string. There are several ways to achieve this, and in this blog post, we will explore three different solutions. Solution 1: Using the slice() method The slice() method in JavaScript allows you to…

  • How Do I Get the Current Date in Javascript?

    As a JavaScript developer, you may often need to work with dates and times. One common task is to get the current date in JavaScript. In this blog post, we will explore different ways to achieve this. Method 1: Using the Date Object The simplest way to get the current date in JavaScript is by…

  • Get All Unique Values in a Javascript Array (Remove Duplicates)

    When working with JavaScript arrays, it is common to encounter situations where you need to remove duplicate values and retrieve only the unique values. In this blog post, we will explore multiple solutions to achieve this in an efficient and concise manner. Solution 1: Using Set One of the easiest ways to remove duplicate values…

  • Compare Two Dates with Javascript

    When working with dates in JavaScript, it is often necessary to compare two dates to determine if they are equal, or which one is greater or smaller. In this blog post, we will explore different ways to compare two dates using JavaScript. Method 1: Using the Comparison Operators The simplest way to compare two dates…