Javascript Articles - Page 585 of 671

In this tutorial, we will learn the best practices to follow while using JavaScript. JavaScript is used in almost every website to make it more user interactive. Throughout the years, ECMAScript has released different versions of JavaScript. Each version has enhanced functionalities and new features, so it is important to know the best practices to follow while using JavaScript. The following are the best practices to be followed while using JavaScript − Meaningful Variable and Function Name The variables’ and functions’ names should be meaningful to their uses. In JavaScript, we use the variable to store some data, and the ... Read More

To get the value of the href attribute of a link in JavaScript, use the href property. It gives you the URL of the linked document in JavaScript.ExampleYou can try to run the following code to get the value of the href attribute of a link.           Qries                var myLink = document.getElementById("anchorid").href;          document.write("Link: "+myLink);          

In this tutorial, we will learn how to get the value of the id attribute a link in JavaScript. The id attribute stores a unique value for an HTML element. The id of an element must be unique, and no other elements should not have the same id. The id attribute of a link can be found in different ways, and in this tutorial, we will discuss the most popular ways of doing it− Using document.getElementById() method Using document.getElementsByTagName() method Using document.querySelectorAll() method Using document.getElementById() Method In JavaScript, The document.getElementById() method is useful for getting different attributes value ... Read More

In this tutorial, we will learn how to get the value of the hreflang attribute of a link in JavaScript. The hreflang is an attribute of a link or anchor tag which specifies the language of the linked document or href attribute. It is used by search engines to understand the link’s language and the targeted geographical location of the website. For better SEO hreflang attribute must be used. A single language or combination of language and region is used as the value of the hreflang attribute. It uses the language code ISO-639-1 and region code ISO-3166-1. For example: If ... Read More

This tutorial teaches us how to remove the options from a dropdown list using JavaScript. Usually, this is not frequent that users get the option to remove any option from the dropdown list but this is possible if the option is provided by the programmer. If the programmer wants to provide the option to remove the dropdown then in JavaScript it is possible with the help of the remove() method. Using the DOM user can select the option to remove and by providing a function it could be passed to the remove method which will remove it. Let’s look into ... Read More

In this tutorial, we will learn how to display the selected option in a dropdown list with JavaScript. What is a dropdown list? A dropdown list is a switchable menu that enables users to select one item from various options. A drop-down list is generated with the tag is most frequently used in forms to gather user input. After submitting the form, the name attribute must refer to the form's data. The DOM API functions getElementById() and querySelector() can be used to choose a element. The process use the querySelector() function to first select the "button" and "select" ... Read More

We use the selectedIndex property in JavaScript to show the index of the selected option in a dropdown list. We use the id of the dropdown list to access the element using JavaScript and then call selectedIndex on it to get the index of the selected option in the dropdown list. Dropdown lists are an important part of user interface utility. It is a list of options from which one or multiple options can be selected by the user. These responses to these dropdown lists are then collected and the required course of action is taken by the user. A ... Read More

To show all the options from a dropdown list, use the options property. The property allows you to get all the options with length property.ExampleYou can try to run the following code to get all the options from a drop-down list.Live Demo                                 One             Two             Three                                 Click the button to get all the options                function display() {             var a, i, options;             a = document.getElementById("selectNow");             options = "";             for (i = 0; i < a.length; i++) {                options = options + " " + a.options[i].text;             }             document.write("DropDown Options: "+options);          }          

This tutorial will show different ways to get the number of options in the drop-down list with JavaScript. While filling out any form online, users have to add unique information using the input method. However, the options they get in the drop-down list are already determined. Since there can be limited options mentioned in the drop-down, you might have to check the number using JavaScript. Using options.length method to get the number of drop-down options One of the simple ways to get access to the list of options is to get the list by its Id. We will use a ... Read More

In this tutorial, we are going to learn how to select multiple options in a dropdown list with JavaScript. Basically, we are going to make two buttons, one is a drop-down button in which we provide more than one option, and another is a normal button connected to the multiFunc() function with an id of the dropdown button, when we click this button then we are able to select multiple options in the drop-down button. In this tutorial we are using two properties of JavaScript one is DOM property i.e. document.getElementById and another one is multiple properties use to choose ... Read More