To set the distance between lines, use the lineHeight property. You can try to run the following code to set the distance between lines in a text with JavaScript −
Example
<!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>