Javascript对文本区域中剩余字符的计数

<textarea id="myTextarea" oninput="countRemainingChars()"></textarea>
<span id="remainingChars">剩余字符数：</span>

function countRemainingChars() {
  // 获取文本区域的内容
  var textarea = document.getElementById("myTextarea");
  var text = textarea.value;

  // 假设限制字符数为200
  var limit = 200;

  // 计算剩余字符数
  var remainingChars = limit - text.length;

  // 更新剩余字符数的显示
  var remainingCharsElement = document.getElementById("remainingChars");
  remainingCharsElement.textContent = "剩余字符数：" + remainingChars;
}

#remainingChars {
  color: red;
  font-weight: bold;
}