Checkbox's value disappear When I inspect element, I didn't see a value of my checkbox.
This is my code
<input type="checkbox" id="test" name="test" value="hello">
and when I inspect element I get this
<input type="checkbox" id="test" name="test" value="">
(I don't know any jquery files kill it or not)
In order to detect if you check-box has been checked you should use some JavaScript, below an example.
Regarding your value on the checkbox if you do not have any other code changing value, the value will remain on your HTML.
https://jsfiddle.net/d94w84q9/
<input type="checkbox" id="test" name="test" value="hello" checked>
var value = document.getElementById('test').checked;
alert(value)
Related
I'm trying to enable a submit/go-to site button when only one of my checkboxes(any single box) has been checked - can anyone help?
this is the checkbox I'm using
<input type="checkbox" id="number2" name="number2" value="2">
<label for="number2">02 </label>
hope that helps
if you could give me help using HTML and CSS as I don't know how to use scripts that would be great thanks
try it:
<input type="checkbox" id="number2" name="number2" checked />
the checked attribute is for Checkbox Input element, when you use it and open your page, it have to check your checkbox automatic!
You have to use JS, sample:
<input type="checkbox" id="number2" name="number2" value="2" onclick="
if (this.checked)
document.getElementById('SomeSubmitButton').enable = true;
">
I told:
When user clicked on this Checkbox, enable #SomeSubmitButton if that's checked.
I want to uncheck my Checkbox with Javascript, but it didn't work. And then I tried to set the checked property to false directly in HTML, but not even that worked: (I tried checked="false" too...)
My HTML:
<input type="checkbox" id="dateCheckbox" checked=false >
<label for="dateCheckbox"> Keinen Zeitraum angeben</label>
Result:
Why is it still checked?
HTML5 does not use true or false for boolean attributes. Boolean attributes are true by specifying the attribute name alone, and a false value is the omission of the attribute.
(For XHTML5, you provide the attribute-name as the value in order to conform to XML's rules for attributes):
So for an unchecked checkbox, change this:
<input type="checkbox" id="dateCheckbox" checked=false >
To this (HTML5 and XHTML5):
<input type="checkbox" id="dateCheckbox">
For a checked checkbox, change this:
<input type="checkbox" id="dateCheckbox" checked=true >
To this (HTML5):
<input type="checkbox" id="dateCheckbox" checked>
or this (XHTML5):
<input type="checkbox" id="dateCheckbox" checked="checked" />
Setting checked attribute to false won't work.
If checked attribute is present on the input element, it doesn't matters what boolean value you give it, input element will always be checked. To make the input element unchecked, you have to remove the checked attribute.
To uncheck the checkbox input element via javascript, you can remove the checked attribute using removeAttribute() method.
Following code snippet unchecks the checkbox after 2 seconds via javascript.
const checkInput = document.querySelector('#dateCheckbox');
setTimeout(() => {
checkInput.removeAttribute('checked');
}, 2000);
<input type="checkbox" id="dateCheckbox" checked>
<label for="dateCheckbox"> Keinen Zeitraum angeben</label>
Checkbox work this way.
<input type="checkbox" id="dateCheckbox" checked>
<label for="dateCheckbox"> Keinen Zeitraum angeben</label>
<br />
<input type="checkbox" id="dateCheckbox">
<label for="dateCheckbox"> Keinen Zeitraum angeben</label>
It actuially doesn't matter if u have anything in checked only it existense does
For example,
<input type="checkbox" id="dateCheckbox" checked>
<label for="dateCheckbox"> Keinen Zeitraum angeben</label>
But, omitting checked works as expected,
<input type="checkbox" id="dateCheckbox">
<label for="dateCheckbox"> Keinen Zeitraum angeben</label>
Checkout https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/checkbox
Unfortunaly, checked is no a boolean value (true or false). If the checked attribute is present in the <input type="checkbox"> tag it will be checked, no matter what you set as value.
If you leave it out, it will work accordingly, because checked is not present.
You need remove "checked" attribute to make checkbox uncheck. checked=false|true has no meaning, same as "selected" in select's options
I'd like to store the value of my radio buttons in a variable.
I tried to do this(but it didn't work):
<div ng-model="ctrl.radio" ng-change="doSomething()">
<input type="radio" name="radio" id="1" ng-value="1"><label for="1">1</label>
<input type="radio" name="radio" id="2" ng-value="2"><label for="2">2</label>
<input type="radio" name="radio" id="3" ng-value="3"><label for="3">3</label>
</div>
By didn't work, i mean that the ng-change event never triggers, which makes me assume AngularJS doesn't magically bind ng-values to a parent model.
I got it to work by putting ng-model and ng-value on each one of the <input> elements, but i think that looks messy. Is there a way to do what I originally wanted?
If i'm using radio buttons in HTML and would like a default option to show as selected, I've used the 'checked' attribute to achieves this. How do I make it so when I check on another option on the radio buttons this default option is removed. In the code below, when you check another option, the original option remains and you can't uncheck anything?
In the option below the fish option is the one with the 'checked' attribute added.
https://codepen.io/pen/?editors=1010
HTML
<input type="radio" id="dog"name="dog"value="dog"><label for="dog">Dog</label>
<input type="radio" id="cat" name="cat" value="cat"><label for="cat">Cat</label>
<input type="radio" id="fish" name="fish" value="fish" checked><label for="fish">Fish</label>
<input type="submit">
Your form radio elements need to have a shared name attribute as they
are the options for one choice. change name to "foo" or "animal" and
it will work.
<div style="margin-bottom:15px;">All radio inputs require a shared name attribute, I declared it "choice"</div>
<form style="text-align:center">
<input type="radio" id="dog"name="choice"value="dog"><label for="dog">Dog</label>
<input type="radio" id="cat" name="choice" value="cat" ><label for="cat" >Cat</label>
<input type="radio" id="fish" name="choice" value="fish" checked="checked" ><label for="fish" >Fish</label>
<input type="submit">
</form>
Suppose this checkbox snippet:
<input type="checkbox" value="1">Is it worth?</input>
Is there any reason to statically define the value attribute of checkboxes in HTML? What does it mean?
I hope I understand your question right.
The value attribute defines a value which is sent by a POST request (i.e. You have an HTML form submitted to a server).
Now the server gets the name (if defined) and the value.
<form method="post" action="urlofserver">
<input type="checkbox" name="mycheckbox" value="1">Is it worth?</input>
</form>
The server would receive mycheckbox with the value of 1.
in PHP, this POST variable is stored in an array as $_POST['mycheckbox'] which contains 1.
I just wanted to make a comment on Adriano Silva's comment.
In order to get what he describes to work you have to add "[]" at the end of the name attribute, so if we take his example the correct syntax should be:
<input type = "checkbox" name="BrandID[]" value="1">Ford</input>
<input type = "checkbox" name="BrandID[]" value="2">GM</input>
<input type="checkbox" name="BrandId[]" value="3">Volkswagen</input>
Then you use something like: $test = $_POST['BrandID']; (Mind no need for [] after BrandID in the php code).
Which will give you an array of values, the values in the array are the checkboxes that are ticked's values.
Hope this helps! :)
One reason is to use the ease of working with values in the system.
<input type="checkbox" name="BrandId" value="1">Ford</input>
<input type="checkbox" name="BrandId" value="2">GM</input>
<input type="checkbox" name="BrandId" value="3">Volkswagen</input>
When the form is submitted, the data in the value attribute is used as the value of the form input if the checkbox is checked. The default value is "on".
$('form').on('change', update).trigger('change')
function update() {
var form = $(this)
form.find('output').text('→ ' + form.serialize())
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form>
<input type="checkbox" name="foo">
<output></output>
</form>
<form>
<input type="checkbox" name="foo" checked>
<output></output>
</form>
<form>
<input type="checkbox" name="foo" value="1" checked>
<output></output>
</form>
<form>
<input type="checkbox" name="foo" value="bananas" checked>
<output></output>
</form>
For the sake of a quick glance answer, from MDN
when a form is submitted, only checkboxes which are currently checked are submitted to the server, and the reported value is the value of the value attribute
It can be confusing because seeing something like
<input type='checkbox' name='activated' value='1'> might lead one to believe that the 1 means true and it will be treated as though it is checked, which is false. The checked attribute itself also only determines if the checkbox should be checked by default on page load, not whether it is currently checked and thus going to be submitted.