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The zoom-in and zoom out is an important functionality for the image. We can see every single information of the image by zoom-in. Maybe, you can press the ‘ctrl’ and ‘+’ keys together to zoom in to your browser, and you can see everything looks bigger in the browser window. The zoom-in feature is useful for reading small texts on the screen also. So, there can be various use cases of zoom in and zoom out. In this tutorial, we will learn to zoom in and zoom out images using JavaScript. Use the height and width properties to ... Read More
Anyone can make a mistake while entering the email in the input field. So, it’s the developer's responsibility to check if users have entered a valid email string. Many libraries are available to validate email addresses, which we can use with various JavaScript frameworks, but not with vanilla JavaScript. However, if we want to use any library, we need to use its CDN. Here, we will use the regular expression to validate the email address in vanilla JavaScript. Regex Used in Example 1 We have used the below regular expression pattern in example 1 to validate the email. let ... Read More
Decision-making occurs at all levels of business, from everyday decisions made by lower-level staff to far-reaching Executives' decisions that may need years of consideration. Many decisions will be carried out by an employee following a rulebook, corporate rules, or company manuals. However, daily decisions are also just as important. Making decisions, both major and little is crucial to a company's success. Furthermore, many business decisions may have a significant impact on many critical aspects of the business. Good decision-making takes a lot more than the ability to think critically (analyzing data and facts to reach a conclusion); it also ... Read More
We have been given the task of validating the input string and need to check whether it is alphanumeric or not using JavaScript. The alphanumeric string contains only numeric and alphabetical characters, including uppercase or lowercase characters, and even it doesn’t contain any special characters or spaces. Below, we will see two approaches to validate an input string. Use the charCodeAt() method We can use the charCodeAT() method to get the ASCII value of any character. Here, we will iterate through every character of the string and check the ASCII value of every character. The ASCII code between 48 ... Read More
We have given the array of elements and need to use the map() on the array in reverse order with JavaScript. The map() method maps the new element related to a particular array element in the resultant array. Sometimes, we require to map the elements in reverse order. There can be many ways to use map() on an array in reverse order. We will see all approaches one by one. Introduction to map() method Syntax Follow the syntax below to use the map() method. array.map((ele, ind, array) => { return ele + 20; }) ... Read More
The filter() method is used to filter values from the array, and the map() method is used to map a new value to another array based on every value of the old array. Sometimes, we require to use the filter() and map() methods together. For example, we wanted to filter all positive numbers from the array and map their logarithmic value to the new array Let’s look at the introduction of the filter() and map() methods before we start with this tutorial. In this tutorial, we will learn to use the map and filter methods simultaneously on an array ... Read More
While working with the HTML checkboxes, sometimes developers may require to use the checkboxes to allow users to select multiple options. Also, developers need to perform some actions based on the selected checkbox. For example, you have given the checkbox with a question like are you above 18? If users check this checkbox, only show the input to take a user’s pan card number. So, we need to call a function whenever the user checks and unchecks the checkboxes. Use the onchange event The onchange event attribute allows us to invoke a function whenever the user checks and ... Read More
Since businesses turn online, the demand for internet marketers is at its peak. The doorway to becoming a competent internet marketer in digital marketing is challenging yet progressive if you be focused from day one. You need to develop a few skill sets and implement them in the core sector of online marketing. If you are still trying to decide what to learn, what skills are necessary, and many other measures you must consider, read the article and understand the process. Digital marketing is emerging, and the impact is high on the global market. However, Internet marketers add value ... Read More
Nowadays, JavaScript is useful for writing frontend and backend code. Also, it is the most widely used programming language. Furthermore, we need to get the data from other servers while developing real-time applications. We can fetch data from other servers or databases using the API, which stands for the application programming interface. Here, we will learn various methods to fetch API to get data using JavaScript. Use the fetch() method The fetch() is a browser’s method to get the data from the API. It takes the API URL as the first parameter we need to get data ... Read More
Lead generation, in other words, increasing your sales by converting possible buyers into confirmed buyers, is challenging but possible. There are times when business owners depended on print media and print advertisement, and the growth could have been faster. Days have changed since business is available online. Digital marketing platforms provide an excellent opportunity to reach out to your possible buyers and turn them into customers. If you want to generate leads through a digital platform but need guidance on where to start, read the article and get the insights. The world has become a global village, business has become ... Read More