CSS 数据类型 <integer> 是一种唯一的 <number> 类型，表示正整数或负整数。许多 CSS 属性和描述符都使用此数据类型，例如 column-count、counter-increment、grid-column、grid-row 和 z-index 属性以及 range 描述符。
数据类型 <integer> 由一个或多个十进制数字组成，包括 0 到 9。它可以选择在前面加上 + 或 - 符号。没有单位与整数相关联。
/* Valid integers */
123 /* Positive integer without a + sign */
+123 /* Positive integer with a + sign */
-123 /* Negative integer */
0 /* Zero */
+0 /* Zero with + sign */
-0 /* Zero with - sign */
/*Invalid integers */
123.0 /* This is a <number>, not an <integer> */
123. /* Decimal points are not allowed */
+--123 /* Only one leading +/- is allowed */
twenty /* Letters are not allowed */
_2 /* Special characters like underscore are not allowed */
\35 /* Escaped Unicode characters are not allowed, even if they are an integer (here: 5) */
3e4 /* Scientific notation is not allowed */以下示例演示了如何使用 <integer> 数据类型来定义 CSS 属性 column-count 中的列数：
<html>
<head>
<style>
.multicol-col-count {
column-count: 3;
}
</style>
</head>
<body>
<h1>column-count Property</h1>
<div>
<p class="multicol-col-count">
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</p>
</div>
</body>
</html>以下示例演示了如何使用 <integer> 数据类型来定义 CSS 属性 grid-template-columns 中的列数：
<html>
<head>
<style>
.grid {
display: grid;
height: 50px;
grid-template-columns: repeat(6, 1fr);
grid-template-rows: 50px;
}
.col1 {
background-color: aqua;
border: 2px dashed black;
}
.col2 {
background-color: lightgreen;
grid-column: 2 / 4;
border: 2px dashed black;
}
.col3 {
background-color: teal;
grid-column: span 2 / 7;
border: 2px dashed black;
}
</style>
</head>
<body>
<div class="grid">
<div class="col1"></div>
<div class="col2"></div>
<div class="col3"></div>
</div>
</body>
</html>
