Seriously i have tried everything that i could think of but i still cant find a way how to uncheck the checkbox once popping up the alert.
var sessionvar;
$.ajaxSetup({cache: false})
$.get('test.php' ,function (data) {
sessionvar = data;
alert(sessionvar);
if(checked){
if(sessionvar > 2){
alert('You only allowed to select maximum 3');
setsession(sBorrowValue, "UNSET");
$(this).attr('checked', false);
}
else{
setsession(sBorrowValue, "SET");
}
}
else{
setsession(sBorrowValue, "UNSET");
}
});
I want to uncheck the checkbox after the alert('You only allowed to select maximum 3');
but not working. i also tried using this.checked = false
, $(this).attr('checked', false);
, $(this).prop('checked', false);
but still its not uncheck the checkbox.
NOTE: this.checked = false
works when outside from ajax. but when i put it on the inside, its not working.
You're writing your code inside $.get
and trying to refer to that checkbox
using $this
. Are you sure this is correct? $(this)
here is undefined.
You should use checkbox actual id instead:
$('#myCheckboxid').attr('checked', false); //or true
EDIT
Your final code would then look like this:
var sessionvar;
$.ajaxSetup({cache: false})
$.get('test.php' ,function (data) {
sessionvar = data;
alert(sessionvar);
if(checked){
if(sessionvar > 2){
alert('You only allowed to select maximum 3');
setsession(sBorrowValue, "UNSET");
$('#myCheckboxid').attr('checked', false); //or true
}
else{
setsession(sBorrowValue, "SET");
}
}
else{
setsession(sBorrowValue, "UNSET");
}
});
Another way to do it without if statements:
$(".checkbox").prop("checked", !$(".checkbox").prop("checked"));
So !$(".checkbox").prop("checked") equals the opposite of the current checked status - call that toggles checked checkboxes to be unchecked, and vice versa for unchecked checkboxes.
To check/uncheck checkboxes you need to:
$(this).prop('checked', false);
$(this).prop('checked', true);
It's a property and not an attribute.
NOTE: this.checked = false works when outside from ajax. but when i put it on the inside, its not working.
So you need to bind the "this" object to the get function:
function setsession() { } var sBorrowValue; $(function () { $('#chk').on('click', function(e) { $.getJSON('https://api.github.com/repositories?since=800' ,function (data) { sessionvar = data; console.log('Now inside the ajax this is: ' + this.outerHTML); alert(sessionvar); if (this.checked){ if(sessionvar > 2){ alert('You only allowed to select maximum 3'); setsession(sBorrowValue, "UNSET"); // use prop $(this).prop('checked', false); } else{ setsession(sBorrowValue, "SET"); } } else{ setsession(sBorrowValue, "UNSET"); } }.bind(this)); }) });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <form> <input type="checkbox" id="chk"> </form>
You should have to uncheck the checkbox by its id not by $(this) and you should also have to check status of checkbox "checked" or not by id of checkbox. Please refer below snippet for more details.
function setsession() { } var sBorrowValue; $(function () { $('#chk').on('click', function(e) { $.getJSON('https://api.github.com/repositories?since=800' ,function (data) { sessionvar = data; console.log('Now inside the ajax this is: ' + this.outerHTML); $("#chk").prop('checked',false); if ($("#chk").is(':checked')){ $("#chk").prop('checked',false); if(sessionvar > 2){ alert('You only allowed to select maximum 3'); setsession(sBorrowValue, "UNSET"); } else{ setsession(sBorrowValue, "SET"); } } else{ setsession(sBorrowValue, "UNSET"); } }.bind(this)); }) });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <form> <input type="checkbox" id="chk"> </form>
Oh well. I did solve the problem. Its about using variables inside my ajax function actually.
var sessionvar;
$.ajaxSetup({cache: false, async:false})
$.get('test.php' ,function (data) {
sessionvar = data;
alert(sessionvar);
});
var sBorrowChecked = $('.sBorrow').attr('checked');
alert(sBorrowChecked);
if(checked){
if(sessionvar > 2){
alert('You only allowed to select maximum 3');
setsession(sBorrowValue, "UNSET");
this.checked = false;
}
else{
setsession(sBorrowValue, "SET");
}
}
else{
setsession(sBorrowValue, "UNSET");
}
Notice what i changed? i use async:false
. and this time i just tried using this.checked = false
. Then it works. However i seems to heard that this async:false
has been deprecated. So i am not sure if this is good solution
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