Use border-collapse
Example analysis:
The border-collapse property is used to set whether the borders of the table are merged into a single border.
The attribute values that can be set are:
● Separate: Default value, the border will be separated; border-spacing and empty will not be ignored -cells property
●Collapse: If possible, borders will be merged into a single border; border-spacing and empty-cells properties will be ignored
Note: All major browsers support the border-collapse attribute; if !DOCTYPE is not specified, the border-collapse attribute may have unexpected effects.
new file
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文网(php.cn)</title>
<style>
table {
border-collapse: collapse;
}
table, td, th {
border: 1px solid black;
padding:10px 15px;
}
</style>
</head>
<body>
<table>
<tr>
<th>姓名</th>
<th>年龄</th>
</tr>
<tr>
<td>Peter</td>
<td>20岁</td>
</tr>
<tr>
<td>Griffin</td>
<td>23岁</td>
</tr>
</table>
</body>
</html>
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