这样不行
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<link rel="icon" href="/favicon.ico" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Vite App</title>
</head>
<body>
<div id="counter">
Counter: {{ counter }}
</div>
<script>
const Counter = {
data() {
return {
counter: 0
}
}
}
Vue.createApp(Counter).mount('#counter')
</script>
</body>
</html>
这样行
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<link rel="icon" href="/favicon.ico" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Vite App</title>
<script src="https://unpkg.com/vue@next"></script>
</head>
<body>
<div id="counter">
Counter: {{ counter }}
</div>
<script>
import { vue } from Vue
const Counter = {
data() {
return {
counter: 0
}
}
}
Vue.createApp(Counter).mount('#counter')
</script>
</body>
</html>
这样也行
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<link rel="icon" href="/favicon.ico" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Vite App</title>
</head>
<body>
<div id="counter">
Counter: {{ counter }}
</div>
<script>
import { reactive, ref } from "vue";
export default {
name: "App",
setup() {
const count = ref(0)
return {
count,
};
},
};
Vue.createApp(Counter).mount('#counter')
</script>
</body>
</html>
为什么用ref必须用ref呢？它是一个什么变量呢，忘记了
但是为什么文档上到这里这个时候还没有用到ref，到什么情况下才会开始用？
