<!DOCTYPE html>
<html>
<body>
<div id="app">
<p v-pre="message">{
{
message }}</p>
</div>
<script src="https://unpkg.com/vue@next"></script>
<script>
const vm = Vue.createApp({
data() {
return {
message: ''
}
}
}).mount('#app')
</script>
</body>
</html>
如果不用这个指令，就是空白，什么也没有哈
<!DOCTYPE html>
<html>
<body>
<div id="app">
<p>{
{
message }}</p>
</div>
<script src="https://unpkg.com/vue@next"></script>
<script>
const vm = Vue.createApp({
data() {
return {
message: ''
}
}
}).mount('#app')
</script>
</body>
</html>