css header 自动编号
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使用css让header自动编号：
<style>
h1,
h2,
h3,
h4,
h5,
h6 {
margin: 0;
padding: 0;
font-weight: normal;
}
h1::before,
h2::before,
h3::before,
h4::before,
h6::before,
h6::before {
padding-right: 1em;
}
h1 {
counter-increment: h1;
padding-left: 1em;
counter-reset: h2
}
h2 {
counter-increment: h2;
padding-left:2em;
counter-reset: h3
}
h3 { counter-increment: h3;
padding-left: 3em;
counter-reset: h4
}
h4 { counter-increment: h4;
padding-left: 4em;
counter-reset: h5
}
h5 { counter-increment: h5;
padding-left: 5em;
counter-reset: h6
}
h6 {
counter-increment: h6; padding-left: 6em;
/* counter-reset: h7 */
}
h1::before {
content: counter(h1)".";
}
h2::before {
content: counter(h1)"."counter(h2)".";
}
h3::before {
content: counter(h1)"."counter(h2)"."counter(h3)".";
}
h4::before {
content: counter(h1)"."counter(h2)"."counter(h3)"."counter(h4)".";
}
h5::before {
content: counter(h1)"."counter(h2)"."counter(h3)"."counter(h4)"."counter(h5)".";
}
h6::before {
content: counter(h1)"."counter(h2)"."counter(h3)"."counter(h4)"."counter(h5)"."counter(h6)".";
}
</style>
在typra中的实现：vim user.base.css
/** initialize css counter */
#write {
counter-reset: h1
}
h1 {
counter-reset: h2
}
h2 {
counter-reset: h3
}
h3 {
counter-reset: h4
}
h4 {
counter-reset: h5
}
h5 {
counter-reset: h6
}
/** put counter result into headings */
#write h1:before {
counter-increment: h1;
content: counter(h1) ". "
}
#write h2:before {
counter-increment: h2;
content: counter(h1) "." counter(h2) ". "
}
#write h3:before,
h3.md-focus.md-heading:before /** override the default style for focused headings */ {
counter-increment: h3;
content: counter(h1) "." counter(h2) "." counter(h3) ". "
}
#write h4:before,
h4.md-focus.md-heading:before {
counter-increment: h4;
content: counter(h1) "." counter(h2) "." counter(h3) "." counter(h4) ". "
}
#write h5:before,
h5.md-focus.md-heading:before {
counter-increment: h5;
content: counter(h1) "." counter(h2) "." counter(h3) "." counter(h4) "." counter(h5) ". "
}
#write h6:before,
h6.md-focus.md-heading:before {
counter-increment: h6;
content: counter(h1) "." counter(h2) "." counter(h3) "." counter(h4) "." counter(h5) "." counter(h6) ". "
}
/** override the default style for focused headings */
#write>h3.md-focus:before,
#write>h4.md-focus:before,
#write>h5.md-focus:before,
#write>h6.md-focus:before,
h3.md-focus:before,
h4.md-focus:before,
h5.md-focus:before,
h6.md-focus:before {
color: inherit;
border: inherit;
border-radius: inherit;
position: inherit;
left:initial;
float: none;
top:initial;
font-size: inherit;
padding-left: inherit;
padding-right: inherit;
vertical-align: inherit;
font-weight: inherit;
line-height: inherit;
}