[javascript] Getting all selected checkboxes in an array

So I have these checkboxes:

<input type="checkbox" name="type" value="4" />
<input type="checkbox" name="type" value="3" />
<input type="checkbox" name="type" value="1" />
<input type="checkbox" name="type" value="5" />

And so on. There are about 6 of them and are hand-coded (i.e not fetched from a db) so they are likely to remain the same for a while.

My question is how I can get them all in an array (in javascript), so I can use them while making an AJAX $.post request using Jquery.

Any thoughts?

Edit: I would only want the selected checkboxes to be added to the array

If you want to use a vanilla JS, you can do it similarly to a @zahid-ullah, but avoiding a loop:

  var values = [].filter.call(document.getElementsByName('fruits[]'), function(c) {
    return c.checked;
  }).map(function(c) {
    return c.value;
  });

The same code in ES6 looks a way better:

var values = [].filter.call(document.getElementsByName('fruits[]'), (c) => c.checked).map(c => c.value);

window.serialize = function serialize() {_x000D_
  var values = [].filter.call(document.getElementsByName('fruits[]'), function(c) {_x000D_
    return c.checked;_x000D_
  }).map(function(c) {_x000D_
    return c.value;_x000D_
  });_x000D_
  document.getElementById('serialized').innerText = JSON.stringify(values);_x000D_
}

label {_x000D_
  display: block;_x000D_
}

<label>_x000D_
  <input type="checkbox" name="fruits[]" value="banana">Banana_x000D_
</label>_x000D_
<label>_x000D_
  <input type="checkbox" name="fruits[]" value="apple">Apple_x000D_
</label>_x000D_
<label>_x000D_
  <input type="checkbox" name="fruits[]" value="peach">Peach_x000D_
</label>_x000D_
<label>_x000D_
  <input type="checkbox" name="fruits[]" value="orange">Orange_x000D_
</label>_x000D_
<label>_x000D_
  <input type="checkbox" name="fruits[]" value="strawberry">Strawberry_x000D_
</label>_x000D_
<button onclick="serialize()">Serialize_x000D_
</button>_x000D_
<div id="serialized">_x000D_
</div>

This should do the trick:

$('input:checked');

I don't think you've got other elements that can be checked, but if you do, you'd have to make it more specific:

$('input:checkbox:checked');

$('input:checkbox').filter(':checked');

var checkedValues = $('input:checkbox.vdrSelected:checked').map(function () {
        return this.value;
    }).get();

Use commented if block to prevent add values which has already in array if you use button click or something to run the insertion

$('#myDiv').change(function() {_x000D_
  var values = [];_x000D_
  {_x000D_
    $('#myDiv :checked').each(function() {_x000D_
      //if(values.indexOf($(this).val()) === -1){_x000D_
      values.push($(this).val());_x000D_
      // }_x000D_
    });_x000D_
    console.log(values);_x000D_
  }_x000D_
});

<div id="myDiv">_x000D_
  <input type="checkbox" name="type" value="4" />_x000D_
  <input type="checkbox" name="type" value="3" />_x000D_
  <input type="checkbox" name="type" value="1" />_x000D_
  <input type="checkbox" name="type" value="5" />_x000D_
</div>_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>

In MooTools 1.3 (latest at the time of writing):

var array = [];
$$("input[type=checkbox]:checked").each(function(i){
    array.push( i.value );
});

Pure JavaScript with no need for temporary variables:

Array.from(document.querySelectorAll("input[type=checkbox][name=type]:checked")).map(e => e.value)

here is my code for the same problem someone can also try this. jquery

<script>
$(document).ready(function(){`
$(".check11").change(function(){
var favorite1 = [];        
$.each($("input[name='check1']:checked"), function(){                    
favorite1.push($(this).val());
document.getElementById("countch1").innerHTML=favorite1;
});
});
});
</script>

var array = []
    $("input:checkbox[name=type]:checked").each(function(){
        array.push($(this).val());
    });

var chk_arr =  document.getElementsByName("chkRights[]");
var chklength = chk_arr.length;             

for(k=0;k< chklength;k++)
{
    chk_arr[k].checked = false;
} 

In Javascript it would be like this (Demo Link):

// get selected checkboxes
function getSelectedChbox(frm) {
  var selchbox = [];// array that will store the value of selected checkboxes
  // gets all the input tags in frm, and their number
  var inpfields = frm.getElementsByTagName('input');
  var nr_inpfields = inpfields.length;
  // traverse the inpfields elements, and adds the value of selected (checked) checkbox in selchbox
  for(var i=0; i<nr_inpfields; i++) {
    if(inpfields[i].type == 'checkbox' && inpfields[i].checked == true) selchbox.push(inpfields[i].value);
  }
  return selchbox;
}   

Using Jquery

You only need to add class to every input, i have add class "source" you can change it of course

<input class="source" type="checkbox" name="type" value="4" />
<input class="source" type="checkbox" name="type" value="3" />
<input class="source" type="checkbox" name="type" value="1" />
<input class="source" type="checkbox" name="type" value="5" />

<script type="text/javascript">
$(document).ready(function() {
    var selected_value = []; // initialize empty array 
    $(".source:checked").each(function(){
        selected_value.push($(this).val());
    });
    console.log(selected_value); //Press F12 to see all selected values
});
</script>

ES6 version:

const values = Array
  .from(document.querySelectorAll('input[type="checkbox"]'))
  .filter((checkbox) => checkbox.checked)
  .map((checkbox) => checkbox.value);

function getCheckedValues() {_x000D_
  return Array.from(document.querySelectorAll('input[type="checkbox"]'))_x000D_
  .filter((checkbox) => checkbox.checked)_x000D_
  .map((checkbox) => checkbox.value);_x000D_
}_x000D_
_x000D_
const resultEl = document.getElementById('result');_x000D_
_x000D_
document.getElementById('showResult').addEventListener('click', () => {_x000D_
  resultEl.innerHTML = getCheckedValues();_x000D_
});

<input type="checkbox" name="type" value="1" />1_x000D_
<input type="checkbox" name="type" value="2" />2_x000D_
<input type="checkbox" name="type" value="3" />3_x000D_
<input type="checkbox" name="type" value="4" />4_x000D_
<input type="checkbox" name="type" value="5" />5_x000D_
_x000D_
<br><br>_x000D_
<button id="showResult">Show checked values</button>_x000D_
<br><br>_x000D_
<div id="result"></div>

Pure JS

For those who don't want to use jQuery

var array = []
var checkboxes = document.querySelectorAll('input[type=checkbox]:checked')

for (var i = 0; i < checkboxes.length; i++) {
  array.push(checkboxes[i].value)
}

I didnt test it but it should work

<script type="text/javascript">
var selected = new Array();

$(document).ready(function() {

  $("input:checkbox[name=type]:checked").each(function() {
       selected.push($(this).val());
  });

});

</script>

You could try something like this:

$('input[type="checkbox"]').change(function(){
       var checkedValue = $('input:checkbox:checked').map(function(){
                return this.value;
            }).get();         
            alert(checkedValue);   //display selected checkbox value     
 })

Here

$('input[type="checkbox"]').change(function() call when any checkbox checked or unchecked, after this
$('input:checkbox:checked').map(function()  looping on all checkbox,

On checking add the value for checkbox and on dechecking subtract the value

$('#myDiv').change(function() {_x000D_
  var values = 0.00;_x000D_
  {_x000D_
    $('#myDiv :checked').each(function() {_x000D_
      //if(values.indexOf($(this).val()) === -1){_x000D_
      values=values+parseFloat(($(this).val()));_x000D_
      // }_x000D_
    });_x000D_
    console.log( parseFloat(values));_x000D_
  }_x000D_
});

<div id="myDiv">_x000D_
  <input type="checkbox" name="type" value="4.00" />_x000D_
  <input type="checkbox" name="type" value="3.75" />_x000D_
  <input type="checkbox" name="type" value="1.25" />_x000D_
  <input type="checkbox" name="type" value="5.50" />_x000D_
</div>_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>

Use this:

var arr = $('input:checkbox:checked').map(function () {
  return this.value;
}).get();

Another way of doing this with vanilla JS in modern browsers (no IE support, and sadly no iOS Safari support at the time of writing) is with FormData.getAll():

var formdata   = new FormData(document.getElementById("myform"));
var allchecked = formdata.getAll("type"); // "type" is the input name in the question

// allchecked is ["1","3","4","5"]  -- if indeed all are checked