javascript - Chrome扩展程序-未捕获的ReferenceError：未定义元素

我正在尝试制作Google Chrome扩展程序并通过单击按钮来调用函数。

HTML

<body>
    <form method="post">
      <input type="text" class="textbox" placeholder="Search" id="inputText">
      <button type="submit" class="button" id="submitButton"></button>
    </form>
    <script type="text/javascript" src=script.js></script>
</body>

script.js

submitButton = document.getElementById("submitButton")
if (submitButton) {
  document.addEventListener('DOMContentLoaded', function() {
    submitButton.addEventListener("click", submit);
  });
}
...
function submit() {
...
}

输出

Uncaught ReferenceError: submitButton is not defined

Chrome扩展程序-未捕获的ReferenceError：未定义元素

0 个答案: