Bootstrap grid system inside table - css

Question

<div class="table-responsive">
<table class="table">
<thead>
Head
</thead>
<tbody>
<tr>
<td>
<div class="row">
<div class="col-lg-6">Item 1.0</div>
<div class="col-lg-6">Item 1.1</div>
</div>
</td>
<td>
<div class="row">
<div class="col-lg-6">Item 2.0</div>
<div class="col-lg-6">Item 2.1</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
This code creates a table where all items are in the same line. I have searched the css file but there is nowhere defined inline or inline-block, so I guess this is normal bootstrap behavior. What I am trying to achieve is to show items with prefix 1 one after another and same for items with prefix 2, but I want them all in same row. I have tried using <ul> with <li> elements, but they are also showed in the same line for some reason.
My table should contain only two columns and one header above them all. This is what I get now:

Answer 1

Issue is due to column classes - col-lg-6 which makes divs use equal width of parent td, use class col-lg-12 to use complete td width, please check the css of these classes below
.col-lg-12 {
width: 100%;
}
.col-lg-12 {
width: 50%;
}
Run below code
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<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<div class="table-responsive">
<table class="table">
<thead>
Head
</thead>
<tbody>
<tr>
<td>
<div class="row">
<div class="col-lg-12">Item 1.0</div>
<div class="col-lg-12">Item 1.1</div>
</div>
</td>
<td>
<div class="row">
<div class="col-lg-12">Item 2.0</div>
<div class="col-lg-12">Item 2.1</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
codepen for reference - https://codepen.io/nagasai/pen/xybpMm

Answer 2

I don't understand yet why you need to use bootstrap grid system inside the table when the td's are designed to work like that. You're also using col-lg-6 which is equivalent to 2 td's inside 1 tr since there is no collapse (lg).
You'll have a similar output if you use this code;
<h6>Default:</h6>
<div class="table-responsive">
<table class="table">
<thead>
<tr>
<th colspan='2'>
Head
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
Item 1.0
</td>
<td>
Item 1.1
</td>
</tr>
<tr>
<td>
Item 2.0
</td>
<td>
Item 2.1
</td>
</tr>
</tbody>
</table>
</div>
<br>
<h6>Two Columns Only:</h6>
<div class="table-responsive">
<table class="table">
<thead>
<tr>
<th colspan='4'>
Head
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
Item 1.0
</td>
<td>
Item 1.1
</td>
<td>
Item 2.0
</td>
<td>
Item 2.1
</td>
</tr>
</tbody>
</table>
</div>