要设置阴影效果，请使用JavaScript中的 textShadow属性。
您可以尝试运行以下代码以使用JavaScript返回文本的阴影效果-
<!DOCTYPE html>
<html>
<body>
<button onclick = "display()">Set Text Shadow</button>
<div id = "myID">
This is Demo Text! This is Demo Text! This is <br>This is Demo Text! This is Demo Text! This is Demo Text! This is Demo Text!<br> This is Demo Text!<br> This is Demo Text! This is Demo Text! This is Demo Text! This is Demo Text!
</div>
<script>
function display() {
document.getElementById("myID").style.textShadow = "2px 2px 2px #ff0000,20px 5px 2px #F1F1F1";
}
</script>
</body>
</html>