以下内容为学习记录，可以参考 MDN 原文。
环境
- vscode 1.46
- Microsoft Edge 83
展示信息的方法
function displayMessage() {
}
html 模板
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Function stage 4</title>
</head>
<body>
<button>Display message box</button>
<script>
</script>
</body>
</html>
css 样式
<style>
.msgBox {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
242px;
border-radius: 10px;
background-color: #eee;
background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.1));
}
.msgBox p {
line-height: 1.5;
padding: 10px 20px;
color: #333;
padding-left: 82px;
background-position: 25px center;
background-repeat: no-repeat;
}
.msgBox button {
background: none;
border: none;
position: absolute;
top: 0;
right: 0;
font-size: 1.1rem;
color: #aaa;
}
</style>
js 逻辑
const btn = document.querySelector('button');
btn.onclick = function () {
displayMessage('Brian: Hi there, how are you today?', 'chat');
};
function displayMessage(msgText, msgType) {
const html = document.querySelector('html');
const panel = document.createElement('div');
panel.setAttribute('class', 'msgBox');
html.appendChild(panel);
const msg = document.createElement('p');
msg.textContent = msgText;
panel.appendChild(msg);
const closeBtn = document.createElement('button');
closeBtn.textContent = 'x';
panel.appendChild(closeBtn);
closeBtn.onclick = function () {
panel.parentNode.removeChild(panel);
}
if (msgType === 'warning') {
msg.style.backgroundImage = 'url(icons/warning.png)';
panel.style.backgroundColor = 'red';
} else if (msgType === 'chat') {
msg.style.backgroundImage = 'url(icons/chat.png)';
panel.style.backgroundColor = 'aqua';
} else {
msg.style.paddingLeft = '20px';
}
}
如果想获取图片和源码，可以点击这里。