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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>包中抽奖</title>
<style>
.start {
border: 1px solid #4caf50;
background: transparent;
font-size: 18px;
padding: 8px 22px;
color: #4caf50;
outline: none;
border-radius: 2px;
cursor: pointer;
}
.start:active {
background: #4caf50;
color: white;
}
.lottery {
font-size: 22px;
color: red;
}
.prize {
color: red;
font-size: 22px;
}
</style>
</head>
<body>
<div>
<button class="start">戳我抽奖!</button>
</div>
<div class="result">
</div>
<script>
var prizeList = ['5年高考3年模拟', '加班一天', '快乐水一罐'];
var startBtn = document.querySelector('.start');
var resultEle = document.querySelector('.result');
startBtn.addEventListener('click', function() {
var prize = Math.floor(Math.random() * 3 + 1);
var text = [
'恭喜！抽到了 ',
'<span class="lottery">',
prize,
'</span>',
' 等奖！奖品是 ',
'<span class="prize">',
prizeList[prize - 1],
'</span>',
'！',
].join('');
resultEle.innerHTML = text;
});
</script>
</body>
</html>
运行结果