<integer> CSS data type is a special type of
number that represents a whole number, whether positive or negative. Integers can be used in numerous CSS properties, such as
<integer> css 数据类型是一种特殊的<number>类型，它表示一个整数，无论是正数还是负数。整数可以用于许多 css 属性，例如
<integer> data type consists of one or several decimal digits, 0 through 9 inclusive, optionally preceded by a single
- sign. There is no unit associated with integers.
<integer>数据类型由一个或多个十进制数字组成，包括 0 到 9，可以选择前面加一个 + 或-号。没有与整数关联的单位。
<integer>values. Opera 12.1 supports values up to 215-1, IE up to 220-1, and other browsers even higher. During the CSS3 Values cycle there was a lot of discussion about setting a minimum range to support: the latest decision, in April 2012 during the LC phase, was [-227-1; 227-1], but other values like 224-1 and 230-1 were also proposed. However, the latest spec doesn't specify a range anymore.
注意：没有有效的<integer>值的正式范围。Opera12.1 支持高达 215-1 的值，IE 高达 220-1 的值，其他浏览器支持更高的值。在 CSS3 值周期中，有很多关于设置最小支持范围的讨论：2012 年 4 月在 LC 阶段的最新决定是 [-227-1; 227-1],，但也提出了 224-1 and 230等其他值。但是，最新的规范不再指定范围。
When animated, values of the
<integer> data type are interpolated using discrete, whole steps. The calculation is done as if they were real, floating-point numbers; the discrete value is obtained using the floor function. The speed of the interpolation is determined by the timing function associated with the animation.
设置动画时，<integer>数据类型的值将使用离散的完整步骤进行插值。计算过程就像是实数，浮点数一样；离散值是使用 floor 函数得到的。插值的速度由与动画相关联的定时函数确定。
12 Positive integer (without a leading + sign) +123 Positive integer (with a leading + sign) -456 Negative integer 0 Zero +0 Zero, with a leading + -0 Zero, with a leading -
12.0 This is a <number>, not an <integer>, though it represents an integer. 12. Decimal points are not allowed. +---12 Only one leading +/- is allowed. ten Letters are not allowed. _5 Special characters are not allowed. \35 Escaped Unicode characters are not allowed, even if they are an integer (here: 5). \4E94 Non-arabic numerals are not allowed, even when escaped (here: the Japanese 5, 五). 3e4 Scientific notation is not allowed.
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