计数器复位 | counter-reset (Lists & Counters) - CSS 中文开发手册
counter-reset 重置一个CSS计数器值。计数器的值可以使用counter-increment增加或减少。
/* Set "my-counter" to 0 */ counter-reset: my-counter; /* Set "my-counter" to -1 */ counter-reset: my-counter -1; /* Set "counter1" to 1, and "counter2" to 4 */ counter-reset: counter1 1 counter2 4; /* Cancel any reset that could have been set in less specific rules */ counter-reset: none; /* Global values */ counter-reset: inherit; counter-reset: initial; counter-reset: unset;
| 初始值 | none |
|---|---|
| 应用于 | all elements |
| 是否继承 | no |
| 媒体 | all |
| 计算值 | as specified |
| Animation type | discrete |
| 规范顺序 | the unique non-ambiguous order defined by the formal grammar |
句法
counter-reset属性指定为下列任一项：
<custom-ident>命名计数器，随后可选择一个<integer>。您可以指定任意数量的计数器，以便根据需要进行重置，每个名称或名称编号对之间用空格分隔。关键字值none.
取值
<custom-ident>要重置的计数器的名称。
<integer>在每次出现元素时重置计数器的值。如果未指定，则默认为0。none不执行计数器复位。
形式语法
[ <custom-ident> <integer>? ]+ | none
实例
h1 {
counter-reset: chapter section 1 page;
/* Sets the chapter and page counters to 0,
and the section counter to 1 */
} 规格
| Specification | Status | Comment |
|---|---|---|
| CSS Lists and Counters Module Level 3The definition of 'counter-reset' in that specification. | Working Draft | No change. |
| CSS Level 2 (Revision 1)The definition of 'counter-reset' in that specification. | Recommendation | Initial definition. |
浏览器兼容性
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|---|
| Basic support | 2.0 | (Yes) | 1.01 | 8.0 | 9.2 | 3.11 |
| Feature | Android | Edge | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | 2.1 | (Yes) | 25.01 | 101 | 10.0 | 3.2 |