Sometimes, we require to use the checkbox inside the select option. We can allow users to select multiple options by introducing the checkboxes with the select option. However, if we use the multiple attributes with the tag, it allows us to select them by pressing the ‘ctrl + left click’, but it is a bad UX. So, we can introduce the checkbox inside the menu to improve the user experience. Here, we will use JQuery and JavaScript to manage the values of the checked checkboxes in the menu. Create a custom select menu The element of ... Read More

In JavaScript, the async-await keyword is used to make the function asynchronous. If we make any function asynchronous, it works like multithreading and executes the code parallelly, which helps us to improve the application performance. Here, we will learn to use the await keyword outside the asynchronous function. Invoke the function immediately We will use the expression in this approach to invoke the function immediately. We can use the await keyword with the promises or any other function inside the function. Syntax Users can follow the syntax below to use the function expression to invoke the function immediately. (async () ... Read More

The task is to check whether the array contains a particular value. Also, we need to check if the array contains the particular object with the given property. This tutorial will use the array.includes(), and array.some() method to check whether the array contains the value or object with a particular property. Use the array.includes() method to check values exist in the array The array.includes() method allows us to check whether the array contains any value. In simple terms, we can search for values in the array using the array.includes() method. Syntax Users can follow the syntax below to use the ... Read More

We will learn to swap two variable values in JavaScript using various approaches. Let’s understand via example what swapping means. For example, we have two variables called variable1 and variable2. When we assign the values of variable2 to variable1 and the value of variable1 to variable2, we can say that we have swapped the values of variable1 and variable2. Use the temporary variable We can create a temporary variable, which means any variable to store the value of the first variable temporarily. After that, we can assign the value of the second variable to the first variable. Next, we can ... Read More

In JavaScript, Programmers can use the forEach() method to iterate through the array of elements. We can call a callback function, which we can pass as a parameter of the forEach() method for every array element. Sometimes, we may require to stop the forEach() loop after executing the callback function for some elements. We can use the ‘break’ keyword with a normal loop to stop it, as shown below. for(let i = 0; i < length; i++){ // code if( some condition ){ break; } ... Read More

Now, the question is why we need to create a query parameter using JavaScript. Let’s understand it via real-life examples. For example, if you go on amazon’s website and search for any product, you will see that it automatically appends your search query to the URL. It means we require to generate the query params from the search query. Also, we can allow users to select any value from the dropdown option. We can generate query parameters and redirect users to a new URL based on the selected value to get results. We will learn to create a query parameter ... Read More

Before we start, let’s understand the hash in JavaScript. The hash is also a string, but it's encrypted using a particular algorithm. Generally, we use the hash for security purposes. For example, Google stores users' emails and passwords in their database. Now, Google’s employees can access their database for development purposes. But can they get the user’s email and password from the database? No, because the password is stored in the hash form, and to decrypt the password, the employee needs the key which we used while creating the hash from the password string. So, in such a way, we ... Read More

In JavaScript, arrays are always dynamic in length. Like other programming languages, we don’t need to define the array's length while creating the array. So, we can create an array and push whatever number of elements we want in the JavaScript array. Here, we will create the dynamic length of the array and add numbers to that. After that, we will sum up all numbers. This tutorial will teach us to create a dynamic length array with numbers and sum the numbers using JavaScript. Use the for loop to sum all elements of the dynamic array We can iterate over ... Read More

We will learn to create a dropdown list using HTML and JavaScript below. Before starting with the article, let’s understand the dropdown list and why we need to use it. The dropdown list gives multiple choices to users and allows them to select one value from all options. However, we can do the same thing using multiple radio buttons, but what if we have hundreds of choices? Then we can use the dropdown menu. When users click the dropdown button, it opens all the choices, and users can select anyone. Also, the dropdown provides a better user experience than the ... Read More

In JavaScript, the object contains various properties and methods. For every property, it contains a value. We need to compare the values of the property also to make the comparison between two objects. Here, we will learn to check if the first object contains all properties that the second object contains and compare the values for every property. Compare the object property values one by one The easiest way is to check for every property of the second object that the first object contains or not. If the first object contains that property, compare the values of both. It means ... Read More