【CSS】counter-incrementを使って擬似要素をリスト化する

番号をふりたいんですけどー

あー、擬似要素を使ってのリスト化ですねー

サンプル一覧

1段目／1からはじまる
2段目／0からはじまる
3段目／01からはじまる
4段目／001からはじまる

See the Pen CSS / counter-increment by 125naroom (@125naroom) on CodePen.

「1」からはじまる

See the Pen CSS / counter-increment by 125naroom (@125naroom) on CodePen.

HTMLとCSSはこちら

HTML

<div>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
</div>

CSS

/*=======
1 2 3 4 5 ...
=======*/
div section {
  counter-increment: section;
}
div section:before {
  content: counter(section);
}

「0」からはじまる

See the Pen 【CSS】counter-incrementを使って擬似要素をリスト化する（1からはじまる） by 125naroom (@125naroom) on CodePen.

HTMLとCSSはこちら

HTML

<div>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
</div>

CSS

/*=======
0 1 2 3 4 ...
=======*/
div section:nth-of-type(1) {
  counter-reset: section;
}
div section:not(:nth-of-type(1)) {
  counter-increment: section;
}
div section:before {
  content: counter(section);
}

「01」からはじまる

See the Pen 【CSS】counter-incrementを使って擬似要素をリスト化する（0からはじまる） by 125naroom (@125naroom) on CodePen.

HTMLとCSSはこちら

HTML

<div>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
</div>

CSS

/*=======
01 02 03 04 05 ...
=======*/
div section {
  counter-increment: section;
}
div section:before {
  content: counter(section, decimal-leading-zero);
}

「001」からはじまる

See the Pen 【CSS】counter-incrementを使って擬似要素をリスト化する（01からはじまる） by 125naroom (@125naroom) on CodePen.

HTMLとCSSはこちら

HTML

<div>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
  <section></section>
</div>

CSS

/*=======
001 002 003 004 005 ...
=======*/
div section {
  counter-increment: section;
}
div section:before {
  content: '0' counter(section, decimal-leading-zero);
}
div section:nth-of-type(99) ~ section:before {
  content: counter(section, decimal-leading-zero);
}