要设置所有字体属性，请使用JavaScript字体 属性。您可以尝试运行以下代码以使用JavaScript在单个声明中设置所有字体属性-
<!DOCTYPE html>
<html>
<body>
<h1>Heading 1</h1>
<p id="myID">
This is Demo Text. This is Demo Text. This is Demo Text. This is Demo Text.
This is Demo Text. This is Demo Text. This is Demo Text. This is Demo Text.
</p>
<button type="button" onclick="display()">Set Font</button>
<script>
function display() {
document.getElementById("myID").style.font = "italic 15px verdana,sans-serif";
}
</script>
</body>
</html>