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思い出したが吉日

はてなブログのMarkdown記法で警告記法(アラート記法)を入れてみた

Markdown はてなブログ Javascript CSS

GitHubに追加された警告記法が便利だったので実装してみた。 ↓こんな感じ

> [!NOTE]  
> Highlights information that users should take into account, even when skimming.

---
> [!TIP]
> Optional information to help a user be more successful.

---
> [!IMPORTANT]  
> Crucial information necessary for users to succeed.

---
> [!WARNING]  
> Critical content demanding immediate user attention due to potential risks.

----
> [!CAUTION]
> Negative potential consequences of an action.

----

[!NOTE]
Highlights information that users should take into account, even when skimming.

[!TIP] Optional information to help a user be more successful.

[!IMPORTANT]
Crucial information necessary for users to succeed.

[!WARNING]
Critical content demanding immediate user attention due to potential risks.

[!CAUTION] Negative potential consequences of an action.

設定は以下のような感じ

<script type="text/javascript">
  document.addEventListener('DOMContentLoaded', function() {
    var quoteBlock = document.querySelectorAll('blockquote > p');
    quoteBlock.forEach(function(e) {
      const match = e.textContent.match(/^\[!(NOTE|TIP|IMPORTANT|WARNING|CAUTION)\]\n/);
      if (!match) { return; }

      var type = match[1];
      var a = document.createElement('p');
      a.classList.add('markdown-alert-title');
      switch (type) {
        case 'NOTE':
          a.innerHTML += '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" width="16" height="16"><path d="M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8Zm8-6.5a6.5 6.5 0 1 0 0 13 6.5 6.5 0 0 0 0-13ZM6.5 7.75A.75.75 0 0 1 7.25 7h1a.75.75 0 0 1 .75.75v2.75h.25a.75.75 0 0 1 0 1.5h-2a.75.75 0 0 1 0-1.5h.25v-2h-.25a.75.75 0 0 1-.75-.75ZM8 6a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z"></path></svg>';
          break;
        case 'TIP':
          a.innerHTML += '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" width="16" height="16"><path d="M8 1.5c-2.363 0-4 1.69-4 3.75 0 .984.424 1.625.984 2.304l.214.253c.223.264.47.556.673.848.284.411.537.896.621 1.49a.75.75 0 0 1-1.484.211c-.04-.282-.163-.547-.37-.847a8.456 8.456 0 0 0-.542-.68c-.084-.1-.173-.205-.268-.32C3.201 7.75 2.5 6.766 2.5 5.25 2.5 2.31 4.863 0 8 0s5.5 2.31 5.5 5.25c0 1.516-.701 2.5-1.328 3.259-.095.115-.184.22-.268.319-.207.245-.383.453-.541.681-.208.3-.33.565-.37.847a.751.751 0 0 1-1.485-.212c.084-.593.337-1.078.621-1.489.203-.292.45-.584.673-.848.075-.088.147-.173.213-.253.561-.679.985-1.32.985-2.304 0-2.06-1.637-3.75-4-3.75ZM5.75 12h4.5a.75.75 0 0 1 0 1.5h-4.5a.75.75 0 0 1 0-1.5ZM6 15.25a.75.75 0 0 1 .75-.75h2.5a.75.75 0 0 1 0 1.5h-2.5a.75.75 0 0 1-.75-.75Z"></path></svg>';
          break;
        case 'IMPORTANT':
          a.innerHTML += '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" width="16" height="16"><path d="M0 1.75C0 .784.784 0 1.75 0h12.5C15.216 0 16 .784 16 1.75v9.5A1.75 1.75 0 0 1 14.25 13H8.06l-2.573 2.573A1.458 1.458 0 0 1 3 14.543V13H1.75A1.75 1.75 0 0 1 0 11.25Zm1.75-.25a.25.25 0 0 0-.25.25v9.5c0 .138.112.25.25.25h2a.75.75 0 0 1 .75.75v2.19l2.72-2.72a.749.749 0 0 1 .53-.22h6.5a.25.25 0 0 0 .25-.25v-9.5a.25.25 0 0 0-.25-.25Zm7 2.25v2.5a.75.75 0 0 1-1.5 0v-2.5a.75.75 0 0 1 1.5 0ZM9 9a1 1 0 1 1-2 0 1 1 0 0 1 2 0Z"></path></svg>';
          break;
        case 'WARNING':
          a.innerHTML += '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" width="16" height="16"><path d="M6.457 1.047c.659-1.234 2.427-1.234 3.086 0l6.082 11.378A1.75 1.75 0 0 1 14.082 15H1.918a1.75 1.75 0 0 1-1.543-2.575Zm1.763.707a.25.25 0 0 0-.44 0L1.698 13.132a.25.25 0 0 0 .22.368h12.164a.25.25 0 0 0 .22-.368Zm.53 3.996v2.5a.75.75 0 0 1-1.5 0v-2.5a.75.75 0 0 1 1.5 0ZM9 11a1 1 0 1 1-2 0 1 1 0 0 1 2 0Z"></path></svg>';
          break;
        case 'CAUTION':
          a.innerHTML += '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" width="16" height="16"><path d="M4.47.22A.749.749 0 0 1 5 0h6c.199 0 .389.079.53.22l4.25 4.25c.141.14.22.331.22.53v6a.749.749 0 0 1-.22.53l-4.25 4.25A.749.749 0 0 1 11 16H5a.749.749 0 0 1-.53-.22L.22 11.53A.749.749 0 0 1 0 11V5c0-.199.079-.389.22-.53Zm.84 1.28L1.5 5.31v5.38l3.81 3.81h5.38l3.81-3.81V5.31L10.69 1.5ZM8 4a.75.75 0 0 1 .75.75v3.5a.75.75 0 0 1-1.5 0v-3.5A.75.75 0 0 1 8 4Zm0 8a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z"></path></svg>';
          break;
      }
      a.innerHTML += type.charAt(0) + type.slice(1).toLowerCase();

      e.textContent = e.textContent.replace(`[!${type}]\n`, '');
      e.parentElement.classList.add("markdown-alert");
      e.parentElement.classList.add(`markdown-alert-${type.toLowerCase()}`);
      e.parentElement.insertBefore(a, e);
    });
  });
</script>

/* 警告記法 */
.markdown-alert {
  border-left: 3px solid !important;
  border-radius: 0px !important;
  padding: 0.5rem !important;
}

.markdown-alert p {
  font-style: normal !important;
  margin: 16px 0 0 !important;
}

.markdown-alert .markdown-alert-title {
  align-items: center;
  display: flex;
  margin: 0 !important;
}

.markdown-alert .markdown-alert-title svg {
  padding-right: 0.3em !important;
} 

.markdown-alert-note {
  border-left-color: #0969da !important;
}

.markdown-alert-note .markdown-alert-title {
  color: #0969da !important;
  fill: #0969da !important;
}

.markdown-alert-tip {
  border-left-color: #1a7f37 !important;
}

.markdown-alert-tip .markdown-alert-title {
  color: #1a7f37 !important;
  fill: #1a7f37 !important;
}

.markdown-alert-important {
  border-left-color: #8250df !important;
}

.markdown-alert-important .markdown-alert-title {
  color: #8250df !important;
  fill: #8250df !important;
}

.markdown-alert-warning {
  border-left-color: #bf8700 !important;
}

.markdown-alert-warning .markdown-alert-title {
  color: #bf8700 !important;
  fill: #bf8700 !important;
}

.markdown-alert-caution {
  border-left-color: #cf222e !important;
}

.markdown-alert-caution .markdown-alert-title {
  color: #cf222e !important;
  fill: #cf222e !important;
}