How do I determine if a checkbox is checked?

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 9  2091

For some reason, my form does not want to get the value of a checkbox... I am not sure if it is my coding or not, but when I try and alert() the value, I get

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无人及你

2020-11-27 06:09

You can use this code, it can return true or false:

$(document).ready(function(){
  
  //add selector of your checkbox

  var status=$('#IdSelector')[0].checked;
  
  console.log(status);

});

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名媛妹妹

2020-11-27 06:16

<!doctype html>
<html lang="en">
<head>
</head>
<body>
<label><input class="lifecheck" id="lifecheck" type="checkbox" checked >Lives</label>

<script type="application/javascript" >
    lfckv = document.getElementsByClassName("lifecheck");
    if (true === lfckv[0].checked) {
      alert('the checkbox is checked');
    }
</script>
</body>
</html>

so after you can add event in javascript to have dynamical event affected with the checkbox .

thanks

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南笙

2020-11-27 06:17

var elementCheckBox = document.getElementById("IdOfCheckBox");


elementCheckBox[0].checked //return true if checked and false if not checked

thanks

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