Using isset from a name of an input - javascript

I am not sure if I am going about this correctly. I have a set of checkbox inputs. If someone selects the last check box all_users_check, I want a new form to appear where I will be listing all of the users in a drop down (haven't added the drop down yet). I thought I could do this by using the name of the input, but I am mistaken apparently as I am getting this error..
How else could I structure what I am doing so that if someone checks that option the new form displays?
<div class="user_dropdown">
<form action="">
<input type="checkbox" name="spectator_check" value=""> Spectators<br>
<input type="checkbox" name="member_check" value="" checked> Team Members<br>
<input type="checkbox" name="commissioner_check" value="" checked> Commissioner(s)<br>
<label for="all_users_check">
<input type="checkbox" name="all_users_check" value="" checked> Individual User<br>
</label>
</form>
</div>
<script>
$(".user_dropdown").hide();
$(".all_users_check").click(function() {
if($(this).is(":checked")) {
$(".user_dropdown").show();
} else {
$(".user_dropdown").hide();
}
});
</script>
This is how the page looks on load. Those fields are already checked for some reason.

Issues in your code.
.all_users_check that is looking for a class. Your element doesn't have a class so this isn't found. You can use a different selector to use the name attribute, https://api.jquery.com/attribute-equals-selector/.
This $(".user_dropdown").hide(); hides your whole form. You might want to move around your divs, or remove that altogether.
The checked attribute checks the field it is on. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input
Use the checked attribute to indicate whether this item is selected
<div class="user_dropdown">
<form>
<input type="checkbox" name="spectator_check" value=""> Spectators<br>
<input type="checkbox" name="member_check" value=""> Team Members<br>
<input type="checkbox" name="commissioner_check" value=""> Commissioner(s)<br>
<label for="all_users_check">
<input type="checkbox" name="all_users_check" value=""> Individual User<br>
</label>
</form>
</div>
<script>
//$(".user_dropdown").hide();
$("input[name='all_users_check']").click(function() {
if($(this).is(":checked")) {
$(".user_dropdown").show();
} else {
$(".user_dropdown").hide();
}
});
</script>

isset is a language construct and can't accept anything other than a variable as indicated by this warning on the linked to manual page:
Warning isset() only works with variables as passing anything else will result in a parse error.
You are not passing in a variable to the isset function, you are passing in a constant value, basically an array with a single string all_users_check. This is not a variable because you are not assigning it to a variable name. Try this instead:
if(isset($_POST['all_users_check']))
Here the variable being passed in is the superglobal $_POST, and you are checking to see if the index all_users_check is set inside of that array.
Update
To check if an input is empty or not via javascript, take a look at this question.

Try using this script, you have set the state of check boxes as checked by default.
<div class="user_dropdown">
<form action="">
<input type="checkbox" name="spectator_check" value=""> Spectators<br>
<input type="checkbox" name="member_check" value=""> Team Members<br><!-- removed 'checked' from this line -->
<input type="checkbox" name="commissioner_check" value=""> Commissioner(s)<br><!-- removed 'checked' from this line -->
<label for="all_users_check">
<input type="checkbox" name="all_users_check" value="" > Individual User<br> <!-- removed 'checked' from this line -->
</label>
</form>
</div>
<script>
$(".user_dropdown").hide();
$(".all_users_check").click(function() {
if($(this).is(":checked")) {
$(".user_dropdown").show();
} else {
$(".user_dropdown").hide();
}
});
</script>
For the other issue of showing the hidden section again, try whether class all_users_check is visible to click.

Related

Associate a checkbox with an input field and make it mandatory only if input value exists

I am trying to make a manual verification system and want the user to check each checkbox associated with individual inputs if a value exists before submission else the form would throw an error.
I have implemented this, but it does not seem to work. Also, I was wondering if there was a better way of achieving the same wherein we avoid passing the parameters to the function.
Similar to how we can associate a submit button for a form using form by supplying the id.
<form>
<input type="text" name="inputFieldOne">
<input type="checkbox" onblur="makeSureItIsSelected('inputFieldOne', 'inputCheckboxOne')" name="inputCheckboxOne">
<input type="text" name="inputFieldTwo">
<input type="checkbox" onblur="makeSureItIsSelected('inputFieldTwo', 'inputCheckboxTwo')" name="inputCheckboxTwo">
<input type="submit" value="Submit">
</form>
<script>
function makeSureItIsSelected(field, checkbox){
let fieldBox = document.getElementsByName(field)[0];
if(fieldBox.value != ''){
checkBox = document.getElementsByName(checkbox)[0];
checkBox.required = true;
}
}
</script>
If you want to set the checkbox to be required when the field has a value, you should hook an event on the field, not the checkbox. input would make a good event for this:
function makeSureItIsSelected(field, checkbox){
let fieldBox = document.getElementsByName(field)[0];
let checkBox = document.getElementsByName(checkbox)[0];
// Require the checkbox when the field has a value
checkBox.required = fieldBox.value != '';
}
<form>
<input type="text" name="inputFieldOne" oninput="makeSureItIsSelected('inputFieldOne', 'inputCheckboxOne')">
<input type="checkbox" name="inputCheckboxOne">
<input type="text" name="inputFieldTwo" oninput="makeSureItIsSelected('inputFieldTwo', 'inputCheckboxTwo')">
<input type="checkbox" name="inputCheckboxTwo">
<input type="submit" value="Submit">
</form>
Note that there's no need for those calls to getElementsByName: Just pass this into the function, and use nextElementSibling to access the checkbox:
function makeSureItIsSelected(field){
// Require the checkbox when the field has a value
field.nextElementSibling.required = field.value != '';
}
<form>
<input type="text" name="inputFieldOne" oninput="makeSureItIsSelected(this)">
<input type="checkbox" name="inputCheckboxOne">
<input type="text" name="inputFieldTwo" oninput="makeSureItIsSelected(this)">
<input type="checkbox" name="inputCheckboxTwo">
<input type="submit" value="Submit">
</form>
That said, it seems odd to have the checkboxes at all. The presence of the field in the form data should be sufficient. But if the checkbox's value has to be in the form data, simply add it on submit without having a checkbox at all.

What value passes from a form with checkbox to the java script

I take a form and wants value of checkbox.
such as:
<form method="post" onSubmit="return nameempty()">
<input name="checkn1" id="check1" type="checkbox" />
<input name="checkn2" id="check2" type="checkbox" />
<input type="submit" value="submit">
</form>
Now I want to know the values of checkbox when it is selected, and also when not selected.
Now I write javascript, and get that each checkbox has value "on" whether it is selected or not.
<script>
function nameempty()
{
alert(document.getElementById('check1').value);
alert(document.getElementById('check2').value);
}
</script>
How could I get 'on' when it is selected and anything else when not selected.
use checked instead of value which will return true if the checkbox is checked or it will return false
<script>
function nameempty()
{
alert(document.getElementById('check1').checked);
alert(document.getElementById('check2').checked);
}
</script>
One way to get the value of a 'checked' check box which includes the check if 'checked'
var check1value = document.querySelector('#check1:checked').value;
In the html you are missing a value attribute (if checked)
<input name="checkn1" id="check1" value="value-here" type="checkbox" />

jQuery to Validate an Input Text Control based on Radio Selection

How do I validate that the input text corresponding to the radio option is checked?
For example, using the image above:
If Contact 1's E-Mail radio option is selected, Contact 1's E-Mail text field cannot be blank, but Contact 1's Phone and US Mail text fields are still permitted.
If Contact 2's US Mail radio option is selected, Contact 2's US Mail text field cannot be blank, but Contact 2's Phone and E-Mail text fields are still permitted.
I have built the form above using the HTML below, but you can play with my Fiddle here: fiddle.
BEGIN UPDATE: I have a newer fiddle with better code here:
fiddle2
It has more instructions in the HTML and a closer attempt at my jQuery. For some reason, though, it still does not seem to be doing anything.
END UPDATE
I have tried naming the fields so that my jQuery can parse them, but that does not mean there is not a better way.
<body>
<form name="jp2code" action="#" method="POST">
<fieldset>
<legend>Contact 1</legend>
<span>
<input type="radio" id="group1_PhoneRadio" name="group1"/>
<label for="group1_PhoneText">Phone:</label>
<input type="text" id="group1_PhoneText" name="group1_PhoneText"/>
<br/>
<input type="radio" id="group1_EMailRadio" name="group1"/>
<label for="group1_EMailText">E-Mail:</label>
<input type="text" id="group1_EMailText" name="group1_EMailText"/>
<br/>
<input type="radio" id="group1_USMailRadio" name="group1"/>
<label for="group1_USMailText">US Mail:</label>
<input type="text" id="group1_USMailText" name="group1_USMailText"/>
</span>
</fieldset>
<fieldset>
<legend>Contact 2</legend>
<span>
<input type="radio" id="group2_PhoneRadio" name="group2"/>
<label for="group2_PhoneText">Phone:</label>
<input type="text" id="group2_PhoneText" name="group2_PhoneText"/>
<br/>
<input type="radio" id="group2_EMailRadio" name="group2"/>
<label for="group2_EMailText">E-Mail:</label>
<input type="text" id="group2_EMailText" name="group2_EMaiText"/>
<br/>
<input type="radio" id="group2_USMailRadio" name="group2"/>
<label for="group2_USMailText">US Mail:</label>
<input type="text" id="group2_USMailText" name="group2_USMailText"/>
</span>
</fieldset>
<div>
<input type="submit" name="submit" value="submit" />
</div>
</form>
</body>
What is the best way to write the jQuery?
I am new to jQuery, but I attempted my hand at it based on some Show/hide examples.
What I created below does not work, but hopefully indicates what I am trying to accomplish.
$(function() {
$("input[type='radio']").change(function() { // when a radio button in the group changes
var id = $(this).id;
var index = id.indexOf('group');
if (index == 0) { // is there a better way to do this?
var groupN_Len = 7; // Length of 'groupN_'
var radio_Len = 5; // Length of 'radio'
var preStr = id.substring(0, groupN_Len);
$"input[name*='preStr']".validate = null; // clear validation for all text inputs in the group
var postStr = id.substring(groupN_Len + 1, id.Length() + 1 - radio_Len); // extract Phone, EMail, or USMail
$(preStr+postStr+'Text').validate({ rules: { name: { required: true } } });
}
});
});
To make sure that the radiobutton is checked for each field, add attribute required="" in one of the radiobuttons for each fieldset.
demo
OK, whatever radio button is selected in the Contact Group's Contact Preferences, that corresponding text field is required.
Here is where I am so far on my jQuery checking:
EDIT:
Modified with tilda's important detail about adding '.' to the class name.
Added Required Attribute: how to dynamically add REQUIRED attribute to textarea tag using jquery?
Removed Required Attribute: jquery removing html5 required attribute
Final code works and looks like this:
<script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.11.1/jquery.validate.js"></script>
<script type="text/javascript">
$(function() {
jQuery.validator.setDefaults({
debug: true,
success: "valid"
});
$("input[type='radio']").change(function() {
$('.'+$(this).attr('name')).each(function(index) {
$(this).removeAttr('required');
});
if($(this).is(':checked')) {
$('.'+$(this).attr('id')).each(function(index) {
$(this).prop('required',true);
});
}
});
$('#submit').click(function() {
$(this).validate();
});
});
Back to the HTML of the document: I did a lot of subtle editing to the text by creating specific ids and names for the radio buttons that matched up with the class names for the text controls.
Here is that end result:
<body>
<form name="jp2code" action="#" method="POST">
<div>For each field below, provide the Phone Number, E-Mail Address, and Street Address. <b>Indicate the preferred contact method using the radio button.</b></div>
<fieldset>
<legend>Contact 1</legend>
<span>
<input type="radio" id="group1_Phone" name="group1"/>
<label for="group1_Phone">Phone:</label>
<input type="text" name="group1_PhoneText" class="group1 group1_Phone" />
<br/>
<input type="radio" id="group1_EMail" name="group1"/>
<label for="group1_EMail">E-Mail:</label>
<input type="text" name="group1_EMailText" class="group1 group1_EMail" />
<br/>
<input type="radio" id="group1_USMail" name="group1"/>
<label for="group1_USMail">US Mail:</label>
<input type="text" name="group1_USMailText" class="group1 group1_USMail" />
</span>
</fieldset>
<fieldset>
<legend>Contact 2</legend>
<span>
<input type="radio" id="group2_Phone" name="group2"/>
<label for="group2_Phone">Phone:</label>
<input type="text" name="group2_PhoneText" class="group2 group2_Phone" />
<br/>
<input type="radio" id="group2_EMail" name="group2"/>
<label for="group2_EMail">E-Mail:</label>
<input type="text" name="group2_EMailText" class="group2 group2_EMail" />
<br/>
<input type="radio" id="group2_USMail" name="group2"/>
<label for="group2_USMail">US Mail:</label>
<input type="text" name="group2_USMailText" class="group2 group2_USMail" />
</span>
</fieldset>
<div>
<input type="submit" value="Send" id="submit"/>
</div>
</form>
</body>
Let me explain what is going on in the jQuery, using the HTML above:
When a radio button's checked state changes, each control with a class name that matches the radio button's name attribute has the required property removed.
If a radio button is checked (i.e. checked=true), then each control with a class name that matches the radio button's id attribute has the required property added.
Finally, the validator seems to have to be run on a single form control (not on individual text controls like I was doing).
Here is the sample Fiddle that I ended with: Fiddle v8
At tilda: You didn't say much, but what you did say helped a lot!

Javascript: Checked radio button

In one page I have two form for search:
<form class="search-panel" method="post" action="" onsubmit="return searchRedirect(this)">
<input type="test" name="searchFor" />
<div class="additional-search-button"></div>
<div id="additional-search-box">
<div class="as-cont">
Books<input type="radio" name="category" value="Books" checked="1" /><br/>
School<input type="radio" name="category" value="School" /><br/>
Music<input type="radio" name="category" value="Music" />
</div>
</div>
<input type="submit" name="search" />
</form>
<form class="search-panel" method="post" action="" onsubmit="return searchRedirect(this)">
<input type="test" name="searchFor" />
Games<input type="radio" name="category" value="Games" checked="1" />
<input type="submit" name="search" />
</form>
My problem is that if I click search for Games in searchRedirect always alert Books, School or Music if they checked:
That is my javascript function:
function searchRedirect(form) {
alert($(form['category']+':checked').val());
if($(form['category']+':checked').val() == 'Форум')
window.location.href = '/forum/search.php?keywords='+form['searchFor'].value;
else {
window.location.href = '/Search/'+$(form['category']+':checked').val()+'/'+form['searchFor'].value;
}
return false;
}
I need if I click to search games - search only for games, if click to search books,school or music - searching only for them. But now search form for games always use first form checked buttons.
form['category'] will give you a NodeList of all form elements whose name is category, thus you can't use it as a selector by concatenating it with :checked. It'd be the equivalent of $("[object NodeList]:checked").
Since you are already using jQuery, you can use the following instead:
alert($(form).find("input[name='category']:checked").val());
That is, within the context of form, find every input element with name category that is checked, and get its value.
you can't real do form["category"] + ":checked", instead use jQuery's filter method and than use 'this' to reference the form. Also, you can/should use jQuery .submit() to catch the event instead of an inline handler and just for clearer code (and also for better performance) put the $(form['category']+':checked') into a variable so jquery won't need to search for the element again and again.
This is a sample:
$('form').submit(function(e){
var checked = $(this['category']).filter(':checked');
var value = checked.val();
alert(value);
})​
This is a fiddle so you can fiddle (the e passed to the submit callback is the event object and e.preventDefault is like returning false so the form won't submit):
http://jsfiddle.net/SJ7Vd/

Disabling a link until a series of checkboxes are checked

I'm trying to figure out how to disable the following link until a series of 4 or 5 checkboxes have been selected.
<input type="image" src="/wp-content/themes/happy/images/add-to-cart.png" name="Buy" class="wpsc_buy_button" id="product_<?php echo wpsc_the_product_id(); ?>_submit_button" onclick="window.location='http://example.com/store/checkout/';"/>
Thanks!
I'm also kind of retarded when it comes to js and jquery, so the simpler the better, please. I would like to have all the code right there near the element, and not off in a different location, even though that might be the "preferred" method.
Thanks a lot.
You can do something like this
<input type="image" src="/wp-content/themes/happy/images/add-to-cart.png" name="Buy" class="wpsc_buy_button" id="product_<?php echo wpsc_the_product_id(); ?>_submit_button" onclick="if($(this).data("enabled")){window.location='http://example.com/store/checkout/';}"/>
And on check box click do this
$("input").click(function(){
//Here check for this checkbox and all other series of checkbox, if they are checked then
$("img[name=Buy]").data("enabled", true);
//else
$("img[name=Buy]").data("enabled", false);
});
Assuming you have jquery referenced, change your onclick method to something like;
onclick="if($('.checkboxClass').not(':checked').length > 0) window.location='http://example.com/store/checkout/'; else {alert('please tick all the checkboxes'); return 0};
Then add the "checkboxClass" (or whatever class you choose) to all of your checkboxes
<input type="checkbox" class="checkboxClass" value="1" />
<input type="checkbox" class="checkboxClass" value="2" />
And so on.
If you have the following form:
<form method="post" action="" class="my-form">
<p>
<input type="checkbox" /> First item
</p>
<p>
<input type="checkbox" /> Second item
</p>
<p>
<input type="image" src="..." />
</p>
</form>
Use jQuery to check on form submit
$(function() {
$(".my-form").submit(function() {
if ($(".my-form input[type=checkbox]:checked").length < 1)
{
alert("You must select at least one checkbox to proceed.");
return false;
}
}
}

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