I want the checkbox with the value 2 to automatically get checked if the checkbox with the value 1 is checked. Both have the same id so I can't use getElementById.
html:
<input type="checkbox" value="1" id="user_name">1<br>
<input type="checkbox" value="2" id="user_name">2
I tired:
var chk1 = $("input[type="checkbox"][value="1"]");
var chk2 = $("input[type="checkbox"][value="2"]");
if (chk1:checked)
chk2.checked = true;
You need to change your HTML and jQuery to this:
var chk1 = $("input[type='checkbox'][value='1']");
var chk2 = $("input[type='checkbox'][value='2']");
chk1.on('change', function(){
chk2.prop('checked',this.checked);
});
id is unique, you should use class instead.
Your selector for chk1 and chk2 is wrong, concatenate it properly using ' like above.
Use change() function to detect when first checkbox checked or unchecked then change the checked state for second checkbox using prop().
Fiddle Demo
Id should be unique, so that set different ids to your elements, By the way you have to use .change() event to achieve what you want.
Try,
HTML:
<input type="checkbox" value="1" id="user_name1">1<br>
<input type="checkbox" value="2" id="user_name2">2
JS:
var chk1 = $("input[type='checkbox'][value='1']");
var chk2 = $("input[type='checkbox'][value='2']");
chk1.change(function(){
chk2.prop('checked',this.checked);
});
You need to change the ID of one. It is not allowed by W3C standard (hence classes vs ID's). jQuery will only process the first ID, but most major browsers will treat ID's similar to classes since they know developers mess up.
Solution:
<input type="checkbox" value="1" id="user_name">1<br>
<input type="checkbox" value="2" id="user_name_2">2
With this JS:
var chk1 = $('#user_name');
var chk2 = $('#user_name2');
//check the other box
chk1.on('click', function(){
if( chk1.is(':checked') ) {
chk2.attr('checked', true);
} else {
chk2.attr('checked', false);
}
});
For more information on why it's bad to use ID's see this: Why is it a bad thing to have multiple HTML elements with the same id attribute?
The error is probably coming here "input[type="checkbox"]
Here your checkbox is out of the quotes, so you query is looking for input[type=][value=1]
Change it to "input[type='checkbox'] (Use single quote inside double quote, though you don't need to quote checkbox)
http://api.jquery.com/checked-selector/
first create an input type checkbox:
<input type='checkbox' id='select_all'/>
$('#select_all').click(function(event) {
if(this.checked) {
$(':checkbox').each(function() {
this.checked = true;
});
}
});
Related
Well, I have this text input that gets sum of all the attributes of "price" inside all checkboxes are checked.
now i can't get an attribute value from a checkbox.
here is my function:
function sum_options() {
var options = [];
$("#form-field-1-11-1").attr("price", 500);
$("#form-field-1-11-2").attr("price", 500);
$("#form-field-1-11-3").attr("price", 0);
$("#form-field-1-11-4").attr("price", 300);
$("#form-field-1-11-5").attr("price", 500);
$("#form-field-1-11-6").attr("price", 500);
$("#form-field-1-11-7").attr("price", 1250);
$("#form-field-1-11-8").attr("price", 500);
$("#form-field-1-11-9").attr("price", 700);
options[0] = $("#form-field-1-11-1");
options[1] = $("#form-field-1-11-2");
options[2] = $("#form-field-1-11-3");
options[3] = $("#form-field-1-11-4");
options[4] = $("#form-field-1-11-5");
options[5] = $("#form-field-1-11-6");
options[6] = $("#form-field-1-11-7");
options[7] = $("#form-field-1-11-8");
options[8] = $("#form-field-1-11-9");
var total = 0;
$.each(options, function() {
this.on("change", function() {
total += this.attr("price");
});
});
$("#sum-field").val(total);
}
thanks!!!
Your code is a lot more complex than it needs to be.
Firstly, you should use data-* attributes to assign custom data to an element. Creating your own non-standard attributes will mean your HTML is invalid and can lead to other issues. Also, if your code is relying on the price attribute, then it should be in the DOM when the page loads.
Secondly there's no need to build an array of single elements. You can select them all in to a single jQuery object and set a change() event handler on them in a single call. I grouped them by class in the below example.
Lastly you can get the total of all the prices by looping through the :checked boxes and adding up their prices. Try this:
$('.checkbox').change(function() {
var total = 0;
$('.checkbox:checked').each(function() {
total += parseFloat($(this).data('price'));
});
$("#sum-field").val(total);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="checkbox" id="form-field-1-11-1" class="checkbox" data-price="500" />
<input type="checkbox" id="form-field-1-11-2" class="checkbox" data-price="500" />
<input type="checkbox" id="form-field-1-11-3" class="checkbox" data-price="0" />
<input type="checkbox" id="form-field-1-11-4" class="checkbox" data-price="300" />
<!-- other checkboxes here... -->
<input type="text" id="sum-field" />
To get the value of the Value attribute you can do something like this:
$("input[type='checkbox']").val();
Or if you have set a class or id for it, you can:
$('#check_id').val();
$('.check_class').val();
However this will return the same value whether it is checked or not, this can be confusing as it is differnt to the submitted form behaviour.
To check whether it is checked or not, do:
if ($('#check_id').is(":checked"))
{
// it is checked
}
You just forgot to parse the return value to a number:
parseInt(this.attr("price"));
the attr() function is returning a string value.
I'm trying to retrieve the text for selected check boxes like so:
HTML:
<label class="checkbox">
<input type="checkbox" name="priority" value="2" checked="checked">2 - Critical
</label>
<label class="checkbox">
<input type="checkbox" name="priority" value="3">3 - Important
</label>
jquery:
$('#priorityContents input:checkbox:checked').each(function() {
if(priorityText.length > 0) {
priorityText = priorityText + "|";
}
priorityText = priorityText + $(this).text();
});
alert(priorityText);
I would expect to see:
2 - Critical
I don't get any errors in my console. What am I missing?
You can try:
<input id="cb" type="checkbox" name="priority" value="2" checked="checked">
<label for='cb' class="checkbox"> 2 - Critical</label>
$('#priorityContents input[type="checkbox"]:checked').each(function() {
var txt = $(this).next('label').text();
});
please note that :checkbox selector is deprecated you can use input[type="checkbox"] instead.
You want to get to the label element, which is the parent of the input:
$('#priorityContents input[type="checkbox"]:checked').parent();
Here's the fiddle: http://jsfiddle.net/Hk63N/
For increased performance, you should consider splitting up the selector:
var priorityText = '';
$('#priorityContents input[type="checkbox"]').filter(':checked').parent().each(function() {
if ( ! priorityText ) {
priorityText = priorityText + "|";
}
priorityText = priorityText + $(this).text();
});
alert(priorityText);
From the jQuery docs:
To achieve the best performance when using these selectors, first select some elements using a pure CSS selector, then use .filter().
Here's the fiddle for this: http://jsfiddle.net/Hk63N/1/
Based on the code you posted, why would you expect to see that result? At no point in that code have you attempted to retrieve the text. I'd suggest:
$('#priorityContents input:checkbox:checked').each(function() {
var next = this.nextSibling,
text = next.nodeType == 3 ? next.nodeValue : '';
console.log(text);
});
JS Fiddle demo.
This iterates over each checked checkbox within the element of the given id, looks at the next sibling of the current node (not the jQuery object, the plain DOM node) and, if that node is a textNode (a node of nodeType equal to 3) assigns the nodeValue (the text contents of that node) to the variable.
If it's not a textNode, then it assigns an empty string instead.
There's some stuff definitely missing from your code. Like the #priorityContents elements which is pretty important if you're searching for it.
Anyway I created this demo that works for me. Basically what you have wrong I believe is this part:
priorityText = priorityText + $(this).text();
The actual checkbox element doesn't own the .text(). YOu needt to go up to the parent to get the actual value contained in there.
DEMO
Try this
var checkedTxt=$('.checkbox :checked').parent().text();
console.log(checkedTxt);
DEMO.
First, wrap the text only in the <label> tags, which is a good idea anyway for usability. Assign the for attribute to the ID of the checkbox:
<input type="checkbox" name="priority" id="priority-2" value="2" checked="checked">
<label class="checkbox" for="priority-2"> 2 - Critical</label>
Then you can target this easily with jQuery selectors:
$('#priorityContents input:checkbox:checked').each(function() {
priorityText = $('label[for="'+$(this).attr('id')+'"]').text();
...
});
That said, the easiest approach might instead be to add whatever text you want in a data-prioritytext attribute on the checkbox, and extract that with .data('prioritytext') in your code.
var name=$(this).parent().text();
you will get the text of that checkbox
In html checkbox have no attributes to take text data. so
use parent()function to take
you can retrieve text of checked checkbox this way using jquery.
var value = $(document).find('input[type="checkbox"]:checked').attr('value');
I have N number of radio button groups in the page with auto generated names.
I want to call a javascript function as the value of the checked property. THIS LINE EXCLUDED AFTER EDIT ( Depending on the return value, the radio button needs to be checked or unchecked.)
<input type="radio" name="auto_generated_name" value="some_value" checked="test_check(args);" />
and the javascript function is
function test_check(params) {
if(conditions){
return true;
}
else
return false;
}
But that does not work. Whatever value I assign to 'checked' property, be it any javascript function or any string etc, the radio button becomes checked.
How can I achieve my goal?
EDIT:
<input type="radio" name="auto_generated_name" value="somevalue" onclick="test_check(args)"/>
4 radio buttons make a group. such N radio groups have html class names in this way : button_group_1, button_group_2, button_group_3, button_group_4 etc.
The 'args' need to be these class (i.e. radio button group) names and the corresponding values (from value="1", value="2", value="3" and value="4" ).
Cookies with the class names and values will be created inside the javascript function.
On page refresh, cookies matching with the class names will be checked and depending on the existence of the corresponding cookies, the radio button will be checked or unchecked.
How to achieve the goals/
Assuming you are using jQuery, use the change event: http://api.jquery.com/change/
The checked attribute is simply a boolean value to indicate whether the radio button should be checked, it cannot contain script, or a reference to a scripting function. Any value in the attribute will cause the radio button to be checked.
Without knowing what mechanism you are using to check each radio button - I can see an args variable but don't know what type this is - it's going to be tricky to write some code for you.
If you can make args into an array of values, then something along the lines of the following should work for you:
var args = new Array(true,false,true)
$.each(args, function(index, value) {
$("INPUT[type=radio]").eq(index).attr("checked", value)
});
Here's a fiddle to show what I mean more clearly
check this output, valid args is 'aa'.
http://jsfiddle.net/X7rcC/1
html:
<input type="radio" name="auto_generated_name" value="some_value1" checked="bb" />
js:
$(function() {
var radios = $("input[type='radio']");
$.each(radios, function(index, value){
var args = value.attributes[1].nodeValue;
test_check(args, value);
})
});
function test_check(params, value){
if(params == "aa"){
$(value).attr("checked",true);
}else
$(value).attr("checked",false);
}
try this:
Here I user a custom attribute to input named groupname. In OP's case groupname="<?php echo $radio_button_group_name; ?>". Then checking the value of this attribute OP can assign checked attribute value.
<input type="radio" name="r1" groupname="gr1"/>
<input type="radio" name="r2" groupname="gr2"/>
$('input:radio').each(function() {
if ($(this).attr('groupname') == 'gr1') {
$(this).attr('checked', true);
} else {
$(this).attr('checked', false);
}
});
Your question really boils down to:
How can I set the value of a checkbox when the page first loads? (Using a parameter stored with the checkbox)
The key insights are:
you can't store a function inside a parameter and expect it to automatically evaluate on load
you can store the data about an object inside data- properties
you can set the value of objects on page load in jQuery using the $(document).ready() event
.
<script type="text/javascript">
$(document).ready( function() { // this code runs when the page is first loaded
var radios = $("input[type='radio']"); // find all of your radio buttons
$.each(radios, function(){
var radio = $(this);
var param = radio.attr('data-param'); // retrieve the param from the object
radio.attr('checked', test_check(param) ); // set the value of the radio button
})
});
function test_check(params) {
if(conditions){
return 'checked';
}
else
return '';
}
</script>
You cannot use a checked attribute this way, because anything as the value will be the same as checked=true Even just checked checks a radio button. What you should do is use a custom attribute which will create the checked attribute:
<input type="radio" name="auto_generated_name" value="some_value" needs_check="param">
<script>
// Do test_check on param for each input
$('input:radio').each(function()
{
var radio = $(this);
var param = radio.attr('needs_check');
var condition = test_check(param);
radio.attr('checked', condition);
});
function test_check(param)
{
return true or false based on param
}
</script>
I was facing same problem and my conclusion is that don't use " " to contain a function.
Correct:
<input type="radio" name="im" id="b1" onclick=alert("hello"); />
Incorrect:
<input type="radio" name="im" id="b1" onclick="alert("hello");" />
I have a photo gallery. Underneath each photo is a checkbox, with the ID containing a prefix of 'checkbox_', followed by the photo ID.
<input type="checkbox" id="checkbox_<%=photoID%>" name="photos">
When I check a 'selectAll' checkbox, like this one:
<input type="checkbox" id="toggleAll" name="toggleAll" onclick="toggleAll()">
I want to check/uncheck all checkboxes that have the name 'photos', so I have this function that should do that... but it doesn't:
function toggleAll() {
if (document.getElementById('toggleAll').checked == true)
{
$('.photoBlob').animate({backgroundColor: 'rgba(0,102,204,0.5)'}, 500);
$('.photoBlob').animate({backgroundColor: 'rgba(204,204,204,1)'}, 1500);
document.getElementByName('photos').checked = true;
}
else
{
$('.photoBlob').animate({backgroundColor: 'rgba(0,0,0,0)'}, 1000);
document.getElementByName('photos').checked = false;
}
}
The rest of the function works okay, it animates the background colors of the containing DIV (#photoBlob) when the toggleALL() function is called. But, I really can't get all the checkboxes to check and I have tried so many different variations!
Can anybody see what I am doing wrong? The problem lies with these two lines:
document.getElementByName('photos').checked = true;
document.getElementByName('photos').checked = false;
Any suggestions gratefully received...
You can do like this,
don't use same name for several check boxes because the name shroud be unique. Instead of use the class.
<input type="checkbox" id="checkbox_<%=photoID%>" class="photos">
an the jquery,
$('#toggleAll').click(function(){
var checked =$(this).attr('checked');
$('.photos').attr('checked', checked);
}
$('#toggleAll').click(function(){
$(':checkbox[name="photos"]').prop('checked',this.checked);
});
Fiddle demo: http://jsfiddle.net/uNeX2/
I think you're missing an "s" in getElementByTagName. Try getElementsByTagName.
This might also work:
$("#toggleAll").click(function() {<br/>
$("input[name='photos']").attr("checked",!!$(this).attr("checked"));
});
well, since you said, you have multiple checkboxes with the name 'photos', selecting only one element by using the function getElementByName, can't be ur choice of game. Using jQuery simplifies the task your trying to do;
$("input[name=photos]").each(function(elem){
elem.checked=true;
}
or simpler;
$("input[name=photos]").attr('checked','checked');
its its js-only, youd need to select all input elements via getElementsByTagName and then filter out the ones that don't comply with having a name of 'photos'.. and then do your task.
Here is simple example using jQuery:
html
<input type="checkbox" id="all" >
<input type="checkbox" name="photo" >
<input type="checkbox" name="photo" >
<input type="checkbox" name="photo" >
<input type="checkbox" name="photo" >
js
$('#all').click(function() {
if ($(this).attr('checked') == undefined) {
$('input[name=photo]').removeAttr('checked');
}
else {
$('input[name=photo]').attr('checked', 'checked');
}
});
Code: http://jsfiddle.net/b8Y9t/3/
I would use:
$('.photos:checkbox').attr('checked','checked');
There is no function called getElementByName. Did you have a javascript-error? I think it should be getElementsByName. This returns a list with elements. That means you have to loop trough it to check all checkboxes.
BTW I think it is not correct to use a name called 'photos' for a checkbox, since a checkbox is a single object and does not display a photo itself. I would name it 'photoCheckbox' or 'cbPhoto' to clearify it is a checkbox.
var checkboxList = getElementsByName('photoCheckbox'); // returns list with checkboxes with name 'photoCheckbox'
if (checkboxList)
{
for (var i = 0; i < checkboxList.length; i++)
{
var checkbox = checkboxList[i];
checkbox.checked = false;
}
}
Thats how the getElementsByName function works. So if you would evaluate this method, you would say this is unnecessary since you are already using jQuery? I would simplify the code of the checkbox:
<input type="checkbox" onclick="toggleAll(this)" />
The new toggleAll function looks like this:
function toggleAll(checkbox)
{
if (checkbox.checked)
{
$('.photoBlob').animate({backgroundColor: 'rgba(0,102,204,0.5)'}, 500);
$('.photoBlob').animate({backgroundColor: 'rgba(204,204,204,1)'}, 1500); // btw why 2 animations on the same elements..?
$('input[name="photos"]').prop("checked", true);
}
else
{
$('.photoBlob').animate({backgroundColor: 'rgba(0,0,0,0)'}, 1000);
$('input[name="photos"]').prop("checked", false);
}
}
// jquery check all or uncheck all
$('.checkall').click(function(){
var status = 'false';
status = $('.checkall').is(":checked");
//alert ('status is ' + status); // you should see true or false
$('.metacheckbox').each( function() {
$(this).attr('checked', status);
});
});
<input class="checkall" type="checkbox" />Check/UnCheck All
<input class="metacheckbox" type="checkbox" id='checkboxone' name="checkboxone" value="Y" />
<input class="metacheckbox" type="checkbox" id='checkboxtwo' name="checkboxtwo" value="Y" />
<input class="metacheckbox" type="checkbox" id='checkboxthree' name="checkboxthree" value="Y" />
this worked for me.
I have several checkboxes and a fake submit button to make an AJAX request:
<form>
<input type="checkbox" value="1"/>
<input type="checkbox" value="2" checked="checked"/>
<input type="checkbox" value="3"/>
<input type="checkbox" value="4" checked="checked"/>
<input type="button" onclick="return mmSubmit();"/>
</form>
Within the mmSubmit() method, I would like to retrieve an array of values that have been selected. Here is what I am currently doing.
mmSubmit = function() {
var ids = [];
$('input[type=checkbox]:checked');.each(function(index) {
ids.push($(this).attr('value'));
});
// ids now equals [ 2 , 4 ] based upon the checkbox values in the HTML above
return false;
};
I'm wondering if there is a shorthand method in jQuery used to retrieve the values into an array, or if what I have is already optimal.
I think this can be accomplished with map. Try the following..
mmSubmit = function() {
var ids = $('input[type=checkbox]:checked').map(function(){
return $(this).val();
}).get();
// ids now equals [ 2 , 4 ] based upon the checkbox values in the HTML above
return false;
};
Take a look at: jQuery Traversing/Map
Well you can use .val() instead of .attr('value').
$.serializeArray() may also do what you want (http://docs.jquery.com/Ajax/serializeArray).
It's needs some optimization, buts generally it is right way. My variant:
mmSubmit = function () {
var ids = [];
$('input[type=checkbox]').each(function () {
if (this.checked) {
ids[ids.length] = this.value;
}
});
return ids;
};
It's little faster.