Radio button checked html javascript
I have two radio buttons within an HTML form. A dialog box appears when one of the fields is null. How can I check whether a radio button is selected? The above could be made more efficient depending on the exact nature of your markup but that should be enough to get you started.
If you're just looking to see if any radio button is selected anywhere on the page, PrototypeJS makes it very easy.
Here's a function that will return true if at least one radio button is selected somewhere on the page. Again, this might need to be tweaked depending on your specific HTML. For server-side validation remember, you can't depend entirely on Javascript for validation!
javascript - How to get value of selected radio button? - Stack Overflow
Let me break that down into pieces to cover it more clearly. Just trying to improve on Russ Cam's solution with some CSS selector sugar thrown in with the vanilla JavaScript.
html - Check a radio button with javascript - Stack Overflow
The scripts in this page helped me come up with the script below, which I think is more complete and universal. Basically it will validate any number of radio buttons in a form, meaning that it will make sure that a radio option has been selected for each one of the different radio groups within the form.
The RadioValidator script will make sure that an answer has been given for both 'test1' and 'test2' before it submits. You can have as many radio groups in the form, and it will ignore any other form elements.
ยป qoxoxoxiqel.web.fc2.com
All missing radio answers will show inside a single alert popup. Here it goes, I hope it helps people. Any bug fixings or helpful modifications welcome: If we are talking about checkboxes and we want a list with the checkboxes checked sharing a name:. With JQuery, another way to check the current status of the radio buttons is to get the attribute 'checked'. This code will alert the selected radio button when the form is submitted.
It used jQuery to get the selected value. Here is the solution which is expanded upon to not go ahead with submission and send an alert if the radio buttons are not checked.
Of course this would mean you have to have them unchecked to begin with! Just remember to set the id 'radio1','radio2' or whatever you called it in the form for each of the radio buttons or the script will not work. If you want vanilla JavaScript, don't want to clutter your markup by adding IDs on each radio button, radio button checked html javascript only care about modern browsersfolex carpet cleaner reviews following functional approach is a little more tasteful to me than a for loop:.
If neither is checked, it will return undefined though you could change the line above to return something else, e.
There is also the forward-looking polyfill approach since the RadioNodeList interface should make it easy to just use a value property on the list of form child radio elements found in the above free download 17 proven currency trading strategies as formElement[radioName]but that has its own problems: How to polyfill RadioNodeList?
This is also working, avoiding to call for an element id but calling it using as an array element. The following code is based on the fact that an array, named as the radiobuttons group, is composed by radiobuttons elements in the same order as they where declared in the html document:. Thank you for your interest in this question.
Because it has attracted low-quality or spam answers that had radio button checked html javascript be removed, posting an answer now requires 10 reputation on this site the association bonus does not count. Would you like to answer one of these unanswered questions instead? Stack Overflow Questions Developer Jobs Documentation beta Tags Users. Sign up or log in to customize your list. Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us.
Log In Sign Up.
Join the Stack Overflow Community. Stack Overflow is a community of 7. Join them; it only takes a minute: How can I check whether a radio button is selected with JavaScript?
Pragnesh Rupapara 11 I don't really follow what you're saying? Are interested in whether or not ANY radio button is selected? I've modified my Prototype example to take advantage of the CSS selector lesson I just learned from R. This way we could answer everything with "include library x, use x.
A lot of people already use jQuery, hence why the answer starts with "With jQuery, it'd be something like" in case they were already using it. Anyone know if it is possible to chain selectors like this? This would get you the value of the last checked radio button. If you have multiple radio groups then this probably won't get you the correct value.
The solution would be different for a different problem scenario such as more than two radio buttons, multiple radio groups, etc: RussCam Yes this works for a tiny page with only 2 radio buttons, but I added my comment to make the answer complete. The best way to get the radio button elements would be by name. Amit sharma 1 3. Matt McCabe 1 10 Shafiqur Rahman Jul 16 '16 at ShafiqurRahman you're absolutely right, I'll update my answer, I don't think you need the quotes around radio.
Besides, this lets the attribute declaration match the corresponding HTML. Trelamenos 91 1 1. Note this behavior wit jQuery when getting radio input values: Bradley Flood 3, 27 Gene Myers 1, 13 Also, returned value can be handled by a nice switch statement.
This would be valid for radio buttons sharing the same name, no JQuery needed. Uxio 5 Claudio Query 3 Christian Juth 1, 1 8 Shafiqur Rahman 7 Shafiqur Rahman Oct 1 '16 at Parag 2, 7 26 You'd have to loop over the elements in the HTMLCollection and see if any of them are checked, as others have suggested. You could simply do: Give radio buttons, same name but different IDs.
I just want to ensure something gets selected using jQuery: If you want vanilla JavaScript, don't want to clutter your markup by adding IDs on each radio button, and only care about modern browsersthe following functional approach is a little more tasteful to me than a for loop: Brett Zamir 7, 2 19 The following code is based on the fact that an array, named as the radiobuttons group, is composed by radiobuttons elements in the same order as they where declared in the html document: Pietro Di Mascio 1.
Stack Overflow works best with JavaScript enabled. Like this because its re usability and simplicity. MathOverflow Mathematics Cross Validated stats Theoretical Computer Science Physics Chemistry Biology Computer Science Philosophy more 3. Meta Stack Exchange Stack Apps Area 51 Stack Overflow Talent.