Getting checkbox checked or not in a array in jquery

This question already has an answer here:

How to check whether a checkbox is checked in jQuery? 56 answers

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The value attribute return value of input. You should use checked that return status of checkbox.

var is_checked = $("input[name='mark_box[]']").map(function(){
  return this.checked ? 1 : 0;
}).get(); 

var is_checked = $("input[name='mark_box[]']").map(function(){
  return this.checked ? 1 : 0;
}).get(); 
console.log(is_checked);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="checkbox" checked id="mark_box0" name="mark_box[]">
<input type="checkbox" id="mark_box1" name="mark_box[]">
<input type="checkbox" id="mark_box2" name="mark_box[]">

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The way you are using is correct but you are getting the value which will remain same at every state. You have to check that the checkbox is checked or not. Here is the code:

var is_checked = $("input[name='mark_box[]']").map(function(){
       return $(this).attr("checked");
}).get(); 

Let me know if you have any query.

---

你需要检查checked而不是value

$(".button").click(function() {
  var checkedArray = $("input[name='mark_box[]']").map(function() {
    return this.checked;
  }).get();
  console.log(checkedArray);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="checkbox" id="mark_box0" name="mark_box[]">
<input type="checkbox" id="mark_box1" name="mark_box[]">
<input type="checkbox" id="mark_box2" name="mark_box[]">
<button class='button'>Submit</button>

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