How I use jQuery "each()" inside HTML table?

ugsgknt
October 27, 2022
122 views
0 votes
2 Answers

Look at the HTML table below:

$(document).on('change', '[name="item_inline"]', function(e) {
  var $this = $(this);
  var $inp = $this.closest('tr').find('[name="rtn_qty[item_id]"]');
  var qty = $this.closest('tr').find('.qty').text();
  $inp.val(qty);
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table>
  <thead>
    <tr>
      <td><input type="checkbox" name="select_all" id="select_all" value="1"></td>
      <td>Item Name</td>
      <td>Qty</td>
      <td>Return Qty</td>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><input type="checkbox" name="item_inline" value="1"></td>
      <td>Name 01</td>
      <td class="qty">150</td>
      <td><input type="text" name="rtn_qty[item_id]" value="">
    </tr>

    <tr>
      <td><input type="checkbox" name="item_inline" value="1"></td>
      <td>Name 02</td>
      <td class="qty">250</td>
      <td><input type="text" name="rtn_qty[item_id]" value="">
    </tr>

    <tr>
      <td><input type="checkbox" name="item_inline" value="1"></td>
      <td>Name 03</td>
      <td class="qty">350</td>
      <td><input type="text" name="rtn_qty[item_id]" value="">
    </tr>
  </tbody>
</table>

Using this table, let say if I checked select_all check box, then I need to fill all the input under Return Qty column with the values of qty column. According to the above table input values should be (150,250,350). And other thing is, if I click on a checkbox inside tr then input of that row should be fill out the qty value of that same row.

I tried the similar way to select_all checkbox with each loop, But I confuse how I use each for this.

Hope somebody may help me out.

Answers

One solution (using each on tr) is to reuse what you have:

Step 1: convert your handler to a function so that it can be reused. Pass in tr as a parameter:

function selectRow(tr) {
  var inp = tr.find('[name="rtn_qty[item_id]"]');
  var qty = tr.find('.qty').text();
  inp.val(qty);
}

Step 2: change your handler to use function (and test it)

$(document).on('change', '[name="item_inline"]', function(e){
  selectRow($(this).closest("tr"))
})

Step 3: on the "all" change, get all the rows then pass each one to your function:

$("#select_all").change(function() {
  var rows = $(this).closest("table").find("tbody tr");
  rows.each((i, tr) => selectRow($(tr)))
});

Put together:

$(document).on('change', '[name="item_inline"]', function(e) {
  selectRow($(this).closest("tr"))
})

$("#select_all").change(function() {
  var rows = $(this).closest("table").find("tbody tr");
  rows.each((i, tr) => selectRow($(tr)))
});

function selectRow(tr) {
  var inp = tr.find('[name="rtn_qty[item_id]"]');
  var qty = tr.find('.qty').text();
  inp.val(qty);
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table>
  <thead>
    <tr>
      <td><input type="checkbox" name="select_all" id="select_all" value="1"></td>
      <td>Item Name</td>
      <td>Qty</td>
      <td>Return Qty</td>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><input type="checkbox" name="item_inline" value="1"></td>
      <td>Name 01</td>
      <td class="qty">150</td>
      <td><input type="text" name="rtn_qty[item_id]" value="">
    </tr>

    <tr>
      <td><input type="checkbox" name="item_inline" value="1"></td>
      <td>Name 02</td>
      <td class="qty">250</td>
      <td><input type="text" name="rtn_qty[item_id]" value="">
    </tr>

    <tr>
      <td><input type="checkbox" name="item_inline" value="1"></td>
      <td>Name 03</td>
      <td class="qty">350</td>
      <td><input type="text" name="rtn_qty[item_id]" value="">
    </tr>
  </tbody>
</table>

With some small changes, we can make it more user friendly

$(document).on('change', '[name="item_inline"]', function(e) {
  selectRow($(this).closest("tr"), $(this).is(":checked"))
  if (!$(this).is(":checked"))
    $("#select_all").prop("checked", false);
})

$("#select_all").change(function() {
  var rows = $(this).closest("table").find("tbody tr");
  var isChecked = $(this).is(":checked");
  rows.each((i, tr) => {
    selectRow($(tr), isChecked);
    $(tr).find(":checkbox").prop("checked", isChecked);
  });
});

function selectRow(tr, checked) {
  var inp = tr.find('[name="rtn_qty[item_id]"]');
  var qty = checked ? tr.find('.qty').text() : "";
  inp.val(qty);
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table>
  <thead>
    <tr>
      <td><input type="checkbox" name="select_all" id="select_all" value="1"></td>
      <td>Item Name</td>
      <td>Qty</td>
      <td>Return Qty</td>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><input type="checkbox" name="item_inline" value="1"></td>
      <td>Name 01</td>
      <td class="qty">150</td>
      <td><input type="text" name="rtn_qty[item_id]" value="">
    </tr>

    <tr>
      <td><input type="checkbox" name="item_inline" value="1"></td>
      <td>Name 02</td>
      <td class="qty">250</td>
      <td><input type="text" name="rtn_qty[item_id]" value="">
    </tr>

    <tr>
      <td><input type="checkbox" name="item_inline" value="1"></td>
      <td>Name 03</td>
      <td class="qty">350</td>
      <td><input type="text" name="rtn_qty[item_id]" value="">
    </tr>
  </tbody>
</table>

As noted in the comments, .val() has a an overload which allows you to make a single call to .val, eg:

$("#select_all").change(function() {
 $('[name="rtn_qty[item_id]"]').val(function(i, oldval) { 
  return $(this).closest("tr").find(".qty").text();
 }) 
});

there may be a better way to use .val() here, but it shows the concept.

I think the easiest solution is catch change event of any table > tbody > input[type="checkbox"]
And catch change event of input[name="select_all"] and do click in the earlier inputs.

I hope it helps 🙂

//On change each table > tbody > input['type="checkbox"']
$('table tbody input[type="checkbox"]').change( function(){
  let parent = $(this).parent().parent();
  let qty = '';
    if( $(this).is(':checked') ){
    qty = $(parent).find('.qty').first().text()
  }
  $(parent).find('input[type="text"]').val(qty)
} )

//On change input[name="select_all"]
$('input[name="select_all"]').change( function(){
  $('table tbody input[type="checkbox"]').click()
} )

//On change each table > tbody > input['type="checkbox"']
$('table tbody input[type="checkbox"]').change( function(){
  let parent = $(this).parent().parent();
  let qty = '';
    if( $(this).is(':checked') ){
    qty = $(parent).find('.qty').first().text()
  }
  $(parent).find('input[type="text"]').val(qty)
} )

//On change input[name="select_all"]
$('input[name="select_all"]').change( function(){
  $('table tbody input[type="checkbox"]').click()
} )

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table>
  <thead>
    <tr>
      <td><input type="checkbox" name="select_all" id="select_all" value="1"></td>
      <td>Item Name</td>
      <td>Qty</td>
      <td>Return Qty</td>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><input type="checkbox" name="item_inline" value="1"></td>
      <td>Name 01</td>
      <td class="qty">150</td>
      <td><input type="text" name="rtn_qty[item_id]" value="">
    </tr>    

    <tr>
      <td><input type="checkbox" name="item_inline" value="1"></td>
      <td>Name 02</td>
      <td class="qty">250</td>
      <td><input type="text" name="rtn_qty[item_id]" value="">
    </tr>    

    <tr>
      <td><input type="checkbox" name="item_inline" value="1"></td>
      <td>Name 03</td>
      <td class="qty">350</td>
      <td><input type="text" name="rtn_qty[item_id]" value="">
    </tr>
  </tbody>
</table>

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