Issues with drawing a table using rowspan and colspan using HTML - html

Question

I have started to draw a table in HTML. I desired to draw
Observe that 2.2 starts at center of 1.1 and 3.1 starts at center of 2.2.
The code I wrote for this is
<table border="3" width="400" height="200">
<tr>
<td rowspan="2">1.1</td>
<td>1.2</td>
</tr>
<tr>
<td rowspan="2">2.2</td>
</tr>
<tr>
<td>3.1</td>
</tr>
<tr>
<td colspan="2">4.1</td>
</tr>
<table>
You can see the output. Can any one tell me why the output is not as i desired by suggesting the changes in the code. Thanks in advance.
After going through the comments I found that code is working fine in chrome. Problem is only in Firefox and Edge.

Answer 1

I think you will need to specify cell height in order to get this work.
table {
text-align:center;
border-collapse:collapse;
}
<table border="3" width="400" height="200">
<tr>
<td height="40" rowspan="2">1.1</td>
<td>1.2</td>
</tr>
<tr>
<td rowspan="2">2.2</td>
</tr>
<tr>
<td>3.1</td>
</tr>
<tr>
<td colspan="2">4.1</td>
</tr>
<table>

Answer 2

Try this style
<style media="screen">
table {
border-collapse: collapse;
}
table, tr, td {
border: 1px solid black;
}
.center {
text-align: center;
}
</style>
and your code for table,
<table width="400" height="200">
<tr>
<td rowspan="2">
<div class="center"> 1.1 </div>
</td>
<td>
<div class="center"> 1.2 </div>
</td>
</tr>
<tr>
<td rowspan="2">
<div class="center"> 2.2 </div>
</td>
</tr>
<tr>
<td>
<div class="center"> 3.1 </div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="center"> 4.1 </div>
</td>
</tr>
<table>

Answer 3

use border-collapse: collapse; to table style
try this code
table{
border-collapse: collapse;
}
td{
text-align:center;
}
<table border="3" width="500" height="300">
<tr>
<td rowspan="2">1.1</td>
<td>1.2</td>
</tr>
<tr>
<td rowspan="2">2.2</td>
</tr>
<tr>
<td>3.1</td>
</tr>
<tr>
<td colspan="2">4.1</td>
</tr>
<table>

Answer 4

your code is written fine for rowspans, check this if it helps
<table border="3" width="400" height="200">
<tr>
<td rowspan="3">1.1</td>
<td>1.2</td>
</tr>
<tr>
<td rowspan="3">2.2</td>
</tr>
<tr>
<td style="border: none;"></td>
</tr>
<tr>
<td>3.1</td>
</tr>
<tr>
<td colspan="2">4.1</td>
</tr>
<table>