要设置线之间的距离，请使用lineHeight属性。您可以尝试运行以下代码以使用JavaScript设置文本中行之间的距离-
<!DOCTYPE html>
<html>
<body>
<h1>Heading 1</h1>
<p id="myID">This is Demo Text.<br>This is Demo Text<br>This is Demo Text</p>
<button type="button" onclick="display()">Set distance between lines</button>
<script>
function display() {
document.getElementById("myID").style.lineHeight = "2";
}
</script>
</body>
</html>