Explain code

Adds an Explain button to every code block. 54 lines of plain HTML and JavaScript. Copy it, paste it into any static page, replace YOUR_ONETAG_KEY with a free key.

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The code

<!-- Explain code: Adds an Explain button to every code block. -->
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<script src="https://onetagai.com/v1.js" data-key="YOUR_ONETAG_KEY"></script>
<style>
.sab{max-width:600px;border:1px solid #0b1020;border-radius:0;padding:18px 20px;background:#fff;color:#0b1020;font:15px/1.55 system-ui,-apple-system,"Segoe UI",sans-serif}
.sab-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.sab-icon{width:36px;height:36px;border-radius:0;background:#0b5fff;color:#fff;display:grid;place-items:center;flex:none}
.sab-title{margin:0;font-size:16px;font-weight:600;line-height:1.3}
.sab-hint{margin:2px 0 0;font-size:13px;color:#5c667d}
.sab-row{display:flex;gap:8px;flex-wrap:wrap}
.sab-input,.sab-area,.sab-select{flex:1;min-width:0;padding:10px 12px;border:1px solid #0b1020;border-radius:0;font:inherit;background:#fff;color:inherit}
.sab-area{width:100%;box-sizing:border-box;resize:vertical}
.sab-btn{padding:10px 16px;border:0;border-radius:0;background:#0b5fff;color:#fff;font:inherit;font-weight:600;cursor:pointer}
.sab-btn:disabled{opacity:.6;cursor:wait}
.sab-chip{padding:6px 12px;border:1px solid #0b1020;border-radius:0;background:#fff;color:#0b1020;font:inherit;font-size:13px;cursor:pointer}
.sab-chip:hover{border-color:#0b5fff;color:#0b5fff}
.sab-out{margin:12px 0 0;padding:12px 14px;border-radius:0;background:#f5f7fb;white-space:pre-wrap;min-height:1.5em}
.sab-out:empty{display:none}
.sab-note{margin:10px 0 0;font-size:12px;color:#99a2b5}
.sab-powered{margin:12px 0 0;text-align:right;font-size:11px;color:#99a2b5}.sab-powered a{color:inherit;text-decoration:none}.sab-powered a:hover{text-decoration:underline}
</style>

<section class="sab" id="sab-code">
  <div class="sab-head"><span class="sab-icon" aria-hidden="true"><svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M16 18l6-6-6-6M8 6l-6 6 6 6"/></svg></span>
    <div><h3 class="sab-title">Explain code</h3><p class="sab-hint">Adds an Explain button to every code block.</p></div></div>
  <pre class="sab-pre"><code>const debounce = (fn, ms) => { let t; return (...a) => { clearTimeout(t); t = setTimeout(() => fn(...a), ms); }; };</code></pre>
  <pre class="sab-pre"><code>SELECT c.name, COUNT(o.id) FROM customers c LEFT JOIN orders o ON o.customer_id = c.id GROUP BY c.id HAVING COUNT(o.id) > 3;</code></pre>
<p class="sab-powered"><a href="https://onetagai.com/?ref=static-ai-block" rel="noopener">Powered by OneTag AI</a></p>
</section>
<style>.sab-pre{position:relative;margin:0 0 10px;padding:12px 14px;border-radius:0;background:#f5f7fb;font:13px/1.5 ui-monospace,Menlo,monospace;overflow:auto}.code-explain{position:absolute;top:8px;right:8px;padding:3px 10px;border:1px solid #0b1020;border-radius:0;background:#fff;font:13px system-ui;cursor:pointer}.code-note{margin:-2px 0 12px;padding:0 4px;font-size:14px;line-height:1.5;white-space:pre-wrap}</style>

<script type="module">
  for (const pre of document.querySelectorAll("pre")) {
    const btn = document.createElement("button"); btn.className = "code-explain"; btn.textContent = "✦ Explain";
    const note = document.createElement("p"); note.className = "code-note";
    pre.append(btn); pre.after(note);
    btn.addEventListener("click", async () => {
      note.textContent = "…";
      try {
        await onetag.ask("Explain what this code does in plain language, two or three sentences.", pre.innerText.replace("✦ Explain", ""), {
          stream: (d) => { if (note.textContent === "…") note.textContent = ""; note.textContent += d; }, maxTokens: 150,
        });
      } catch (err) { note.textContent = err.message; }
    });
  }
</script>
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