checking if a checkbox is checked?

 

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  • How to check whether a checkbox is checked in jQuery? 56 answers 
    • if($('#element').is(':checked')){

    //checkbox is checked

}

    or 

    if($('#element:checked').length > 0){

    //checkbox is checked

}

    or in jQuery 1.6+: 

    if($('#element:checked').prop('checked') === true){

    //checkbox is checked

}

    It depends on where you are trying to do this. Generally you can do: 

    $('#element').is(':checked');

    or 

    $('#element')[0].checked;

    or 

     $('#element').prop('checked');

    or older version of jquery ( < 1.6) that doesn't support prop, attr used to do the job of prop as well to set/reset properties of element (Incase of standalone attributes like checked, selected, disabled etc...); 

     $('#element').attr('checked') //will return boolean value

    If it is in the context of the checkbox like, if in a change event you can just do: 

      this.checked

    Using element's id or class is a good way of doing all this, but since we're using jQuery, you might use their API and here is the solution: 

    $('input[type="checkbox"]').is(':checked') {
  // do the stuff here..
}

    You can also use #element instead of the input[type="checkbox"]' .

    This way, you can get to know that the checkbox is checked.

    链接地址: http://www.djcxy.com/p/9522.html

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