所以，我试图制作一个网络应用程序，它的行为类似于使用文本区域元素作为输入的机器人。在参考 W3Schools 提供的JS DOM 文档时，我发现我的代码无法正常工作。我也是 JS DOM 的新手，所以如果我是你见过的最愚蠢的人，请原谅我。 （我可能是）
代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>replit</title>
<link href="https://bot.valueyu.repl.co/style.css" rel="stylesheet" type="text/css" />
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<script src="script.js"></script>
</head>
<script>
function reply() {
const rplyBox = document.getElementById('rplyBox')
const input = document.getElementById('msgBox').value;
if (input === "help") {
const embed = document.createElement("div");
embed.classList.add("w3-round-xxlarge", "w3-margin-top", "w3-margin-bottom", "w3-margin-right", "w3-margin-left")
const title = document.createElement("h1")
title.createTextNode("Help");
const desc = document.createElement("h3")
desc.createTextNode("All of my commands!");
const field1 = document.createElement("h6")
field1.createTextNode("e");
embed.appendChild(title);
embed.appendChild(desc);
embed.appendChild(field1);
rplyBox.appendChild(embed);
}
}
</script>
<body style="background-image: url('https://bot.valueyu.repl.co/bg.mp4'); background-repeat: no-repeat; background-size: cover;">
<div class="main">
<t>bot.valueyu</t>
<p>bot.valueyu is a bot made by Aarav Saini/Valueyu. For commmands type "<span
class="w3-text-white">help</span>".</p>
<hr>
<textarea class="w3-round-large w3-bar" id="msgBox"></textarea>
<br>
<br>
<br>
<button id="submit" onClick="reply()" class="w3-round-xxlarge w3-button">Send</button>
<hr>
<div class="w3-bar w3-white w3-round-large" id="rplyBox">
</div>
</div>
</body>
</html>