How to check the boolean of checkbox?

Question

I know this might sounds duplicate questions but none of them work for me. So far that i have done is getting the value but i want to know how to get the on/off value from the checkbox. I tried hidden field but i can't get the 1/0 value from the checkbox itself. All i get is the value.

My code is like this

$(document).delegate('.sBorrow', 'change', function(){
            var sBorrowClass = $(this).attr('class');
            var sBorrowValue = $(this).attr('value');
            var sBorrowName = $(this).attr('name');

            if(sBorrowClass.checked = true){
                alert(sBorrowValue);
                alert("unchecked");
            }
            else{
                alert(sBorrowValue);
                alert(sBorrowClass);
            }

For the checkbox form is like this

foreach($r as $row){
            $sBorrow = $_SESSION['sBorrow'];

            echo "<tr align='center'><td>". ($startrow+1) ."</td><td>". $row['matricno'] ."</td><td>". $row['studentname'] ."</td><td>". $row['programme'] ."</td><td>". $row['title'] ."</td><td>". $row['thesis_level'] ."</td><td>". $row['serialno'] ."</td><td>". $row['bavailable'] ."</td><td>
            <form method='post'>
            <input type='checkbox' name='sBorrow' id='sBorrow' class='sBorrow' value='". $row['serialno'] ."'>
            <input type='hidden' name='sBorrow' value=0 />
            </form></td></tr>";
            $startrow++;
            //echo $row['education_level'];

and questions 2.. Also how to make my checkbox remains checked when the user searching for more data after check the checkbox (Livesearch Ajax). Should i use localStorage or SESSION to store the value up until the user refresh?

= is the assignment operator, not the comparisons which is == or ===. — Spencer Wieczorek
– Spencer Wieczorek, Commented Jul 29, 2016 at 2:39
Oh my bad i was hoping its solve it but no. it still goes to else condition even when i checked or unchecked — AhKing
– AhKing, Commented Jul 29, 2016 at 2:40
Oh I didn't notice, but you are getting an attribute, not the element. — Spencer Wieczorek
– Spencer Wieczorek, Commented Jul 29, 2016 at 2:41
Possible duplicate of How to check if a checkbox is checked in jQuery? — Spencer Wieczorek
– Spencer Wieczorek, Commented Jul 29, 2016 at 2:43
Just use $(this). for example $(this)[0].checked or $(this).is(":checked") will work. — Spencer Wieczorek
– Spencer Wieczorek, Commented Jul 29, 2016 at 2:43

Ismail RBOUH · Accepted Answer · 2016-07-29 02:45:54Z

1

The problem is that attr('string') will return the attribute value as a String which has no property checked. You can use this.checked:

if(this.checked) {
    //Checkbox is checked
}

I hope this will help you.

answered Jul 29, 2016 at 2:45

Ismail RBOUH

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1 Comment

AhKing Over a year ago

Yeah it does work. Thanks. Yours and Spencer Wieczorek got the credit for this.

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