Function-Derivative-Visualisation/index.html at main · ironmanfpv/Function-Derivative-Visualisation · GitHub

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<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="description"
    content="Visualise mathematical functions and their derivatives on interactive Cartesian planes. A learning tool for students.">
  <title>Function &amp; Derivative Visualiser</title>
  <link rel="preconnect" href="https://fonts.googleapis.com">
  <link
    href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap"
    rel="stylesheet">
  <link rel="icon" href="public/images/favicon.ico" type="image/x-icon">
  <link rel="stylesheet" href="style.css">
</head>

<body>
  <div class="app">

    <!-- Top-left: Function Input -->
    <div class="panel" id="input-panel">
      <div class="panel-header">Function Input</div>
      <div class="input-group">
        <label for="fn-input">f(x) =</label>
        <input type="text" id="fn-input" placeholder="e.g.  x^3 - 2*x + 1" autocomplete="off" spellcheck="false"
          autocapitalize="none" autocorrect="off" />

        <label style="margin-top:4px;">f(x) Axis Range</label>
        <div class="range-row">
          <div class="range-field">
            <label for="range-xmin">x min</label>
            <input type="number" id="range-xmin" class="range-input" placeholder="-10" value="-10" step="0.01" />
          </div>
          <div class="range-field">
            <label for="range-xmax">x max</label>
            <input type="number" id="range-xmax" class="range-input" placeholder="10" value="10" step="0.01" />
          </div>
        </div>
        <div class="range-row">
          <div class="range-field">
            <label for="range-ymin">y min</label>
            <input type="number" id="range-ymin" class="range-input" placeholder="-10" value="-10" step="0.01" />
          </div>
          <div class="range-field">
            <label for="range-ymax">y max</label>
            <input type="number" id="range-ymax" class="range-input" placeholder="10" value="10" step="0.01" />
          </div>
        </div>

        <button id="enter-btn">ENTER</button>
        <div id="error-msg"></div>
      </div>
      <div class="hint">
        Supported: <code>x</code>, <code>^</code>, <code>sin</code>, <code>cos</code>,
        <code>tan</code>, <code>ln</code>, <code>sqrt</code>, <code>e</code>, <code>pi</code>
      </div>
    </div>

    <!-- Top-right: f(x) graph -->
    <div class="panel canvas-panel top" id="fn-canvas-panel">
      <span class="canvas-label fn">f(x)</span>
      <canvas id="canvas-fn"></canvas>
    </div>

    <!-- Bottom-left: Derivative display -->
    <div class="panel" id="deriv-panel">
      <div class="panel-header">Derivative</div>
      <div class="deriv-display" id="deriv-display">
        <div class="fn-placeholder" id="fn-placeholder-orig">Enter a function above…</div>
      </div>
      <div class="input-group" style="padding-top:0;">
        <label>f ′(x) Axis Range</label>
        <div class="range-row">
          <div class="range-field">
            <label for="range-dxmin">x min</label>
            <input type="number" id="range-dxmin" class="range-input" placeholder="-10" value="-10" step="0.01" />
          </div>
          <div class="range-field">
            <label for="range-dxmax">x max</label>
            <input type="number" id="range-dxmax" class="range-input" placeholder="10" value="10" step="0.01" />
          </div>
        </div>
        <div class="range-row">
          <div class="range-field">
            <label for="range-dymin">y min</label>
            <input type="number" id="range-dymin" class="range-input" placeholder="-10" value="-10" step="0.01" />
          </div>
          <div class="range-field">
            <label for="range-dymax">y max</label>
            <input type="number" id="range-dymax" class="range-input" placeholder="10" value="10" step="0.01" />
          </div>
        </div>
        <button id="deriv-enter-btn"
          style="font-family:'Inter',sans-serif;font-size:14px;font-weight:600;padding:12px 0;border:none;border-radius:10px;cursor:pointer;background:linear-gradient(135deg,var(--accent),#9b6aff);color:#fff;letter-spacing:.4px;transition:transform .15s,box-shadow .25s;margin-top:4px;">ENTER</button>
        <button id="lock-btn"
          style="font-family:'Inter',sans-serif;font-size:13px;font-weight:600;padding:10px 0;border:2px solid var(--accent);border-radius:10px;cursor:pointer;background:transparent;color:var(--accent);letter-spacing:.4px;transition:all .2s;margin-top:4px;">🔓
          Lock Points</button>
      </div>
    </div>

    <!-- Bottom-right: f'(x) graph -->
    <div class="panel canvas-panel bottom" id="deriv-canvas-panel">
      <span class="canvas-label deriv">f ′(x)</span>
      <canvas id="canvas-deriv"></canvas>
    </div>

  </div>

  <script src="script.js"></script>
</body>


</html>