Topic: JavaScript / jQueryPrev|Next Show Answer: Use the jQuery :checked selectorYou can simply
use the jQuery Let's try out the following example to understand how it basically works:
Related FAQHere are some more FAQ related to this topic:
Summary: in this tutorial, you will learn how to use JavaScript to check which radio button in a radio group is checked. Introduction to the JavaScript Radio ButtonRadio buttons allow you to select only one of a predefined set of mutually exclusive options. To create a radio button, you use the To form a radio group, you use a common name for all the radio buttons. For example:
In this example, all the radio buttons have the same name size but different values. Because of this, you can only select one radio button at a time. To find the selected radio button, you follow these steps:
To know which radio button is checked, you use the
How it works. First, select the button with
Second, register a click event listener on the button element:
Third, iterate over the radio buttons and get the value of the selected radio button:
If a radio button is
checked, its Since only one radio button in a radio group can be checked at a time, the loop is terminated immediately by the Finally, set the message for the output element:
Radio button’s change eventWhen you check or uncheck a radio button, it fires the change event. To listen to the change event, you use the addEventListener() method like this:
Inside the change event handler, you can access the
To get the value of the checked button, you use the value property:
It’ll look like this:
The following example dynamically generates a radio group and shows the selected value when a radio button is checked:
How it works. First, define an array of strings that hold the sizes. In practice, you may get these values from a database in the back-end or from the result of an API call:
Second, generate the radio groups from the elements of the sizes array:
In this code: 1) Select the element with id #group. 2) Generate a radio group using the map() method with template literals; each array element is corresponding to a radio button HTML. 3) Join radio button HTML strings into an HTML string using the join() method. 4) Assign the HTML to the innerHTML of the output element. Third, select all the radio buttons with the name size and add the change event listener:
Finally, define the change event handler:
Summary
Was this tutorial helpful ? How can I tell if a radio button is unchecked?To find the selected radio button, you follow these steps: Select all radio buttons by using a DOM method such as querySelectorAll() method. Get the checked property of the radio button. If the checked property is true , the radio button is checked; otherwise, it is unchecked.
How can pass radio button value to another page in PHP?what is the behavior you expect? radio buttons should work like this: $_POST['check'] will exist if at least one of the options was chosen .. also notice the apostrophes.. $_POST['check'] and not $_POST[check] ... . <input type="radio" name="check" id="check' value="<? php echo $rows['deliveryid']; ?>"></ td> – Nimit Dudani.. How radio buttons form elements are used in PHP?A Radio Button is a way to restrict users to having only one choice. Examples are : Male/Female, Yes/No, or answers to surveys and quizzes.
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