如何在 Chrome 扩展中为输入框绑定回车键触发转换功能-html教程

以下是优化后的 HTML 结构（关键修改已高亮）：

<html>
<head>
  <title>Crypto Currency Converter</title>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link rel="stylesheet" href="style.css">
</head>
<body>
  <!-- ✅ 移除 <form> 标签，避免隐式 submit 行为 -->
  <div class="converter-container">
    <div class="convertFrom">
      <select id="convertFrom">
        <option value="ETH">ETH</option>
        <option value="BTC">BTC</option>
        <option value="SOL">SOL</option>
      </select>
    </div>
    <div class="convertTo">
      →
      <select id="convertTo">
        <option value="BTC">BTC</option>
        <option value="ETH">ETH</option>
        <option value="SOL">SOL</option>
        <option value="USD">USD</option>
      </select>
    </div>
    <div class="amountToConvert">
      <input type="number" placeholder="0.05" id="amount" autofocus required>
    </div>
    <div class="convertButton">
      <button type="button" id="convertButton">Convert</button>
    </div>
  </div>
  <div id="result"></div>
  <script src="popup2.js"></script>
</body>
</html>

对应 JavaScript 也建议增强健壮性：