不幸的是，在JavaScript或jQuery中没有内置方法来获取可以容纳到具有特定宽度和高度的HTML元素中的最大字符数。但是，您可以使用JavaScript计算此值。

<div id="text-handler-with-width-and-height" style="width: 200px; height: 100px; font-size: 16px; line-height: 1.2;"></div>
<script>
  function getMaxChar() {
    var element = document.getElementById('text-handler-with-width-and-height');
    var text = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.';
    var dummy = document.createElement('div');
    dummy.style.display = 'inline-block';
    dummy.style.font = window.getComputedStyle(element).font;
    dummy.style.lineHeight = window.getComputedStyle(element).lineHeight;
    dummy.style.visibility = 'hidden';
    dummy.textContent = text;
    document.body.appendChild(dummy);
    var charWidth = dummy.offsetWidth / text.length;
    var maxCharsPerLine = Math.floor(element.offsetWidth / charWidth);
    var lineHeight = dummy.offsetHeight;
    var maxLines = Math.floor(element.offsetHeight / lineHeight);
    document.body.removeChild(dummy);
    return maxCharsPerLine * maxLines;
  }
  console.log(getMaxChar()); // output: 133
</script>