Last Updated : Jul 1, 2023
Before submitting the form, the coders check the radio buttons to make sure the user has chosen an option.
Assume you want to submit the application with no options checked. In that case, something will go wrong.
By warning them of mistakes while they submit forms without selecting an option from the radio buttons, it can help to enhance the user experience.
When a radio button is checked or selected, it returns the boolean value "true," and when it returns "false," it indicates that the button is not checked.
- HTML and HEAD tags are used as the first lines of code before the script is written.
- Next, we write the validation function, which will activate when clicking the submit button and check to see if any options have been selected or not.
- Using "form.lang," we then construct a variable with the provided name that contains all of the radio buttons.
- Next, we use an if statement to iterate through the radio buttons up to their length and use the "checked" property to determine whether or not each button is checked.
- Break the loop when any radio buttons are selected. If none of the buttons are chosen, the message "Please check any radio button" will appear.
- Next, we end our script with the SCRIPT tag and begin it with the body, which is the actual code that we want to see on the website.
- We develop the form having radio buttons in the body section that allows users to choose whether to learn a particular language.
- After that, we develop the submit button and connect it to a "onclick" event that triggers the "validate" ().
- Using FORM, BODY, and HTML elements, we close out our code.
The button's selection or deselection will be tested, and a boolean value will be provided for the conditions that are checked or unchecked.