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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>Document</title> <script src="vue.global.js"></script> </head> <body> <div id="app"> <!-- 插值表达式 --> {{msg}} <h2>{{web.title}}</h2> <h2>{{web.url}}</h2> <h2>{{number}}</h2> <h2>{{arr}}</h2> </div> <script> const { createApp, reactive, ref } = Vue createApp({ setup() { const number = ref(10) const arr = ref([1,2,3,4])//ref也能存数组 number.value=20 //修改number的值 const web = reactive({ title: "tao355667", url: "tao355667.com" }) return { msg: "success", web, number, arr } } }).mount("#app") </script> </body> </html>
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