v-text
设置标签的文本值（textContent）
<h3 v-text="message"></h3>
可以进行拼接操作，如：
<h3 v-text="message+'123'"></h3>
v-html
设置标签的innetHTML
<h3 v-html="content"></h3>
完整代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Lesson 3 v-text v-html</title>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.js"></script>
</head>
<body>
<div id="app">
<p v-text="message"></p>
<p v-text="message+'!!'"></p>
<p v-html="content"></p>
</div>
<script>
let tmp = new Vue({
el: "#app",
data: {
"message": "Hello Vue",
"content": "<a href='https://www.bilibili.com' target='blank'>哔哩哔哩</a>"
}
})
</script>
</body>
</html>