vue3.0 组合式API 加加减减

  • Z时代
  • 2024-01-10
  • 分类：综合

vue

通过cdn安装vue

setup（）

createApp()

ref

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>vue3.0</title>
  <script src="https://cdn.bootcdn.net/ajax/libs/vue/3.0.11/vue.global.prod.js"></script>
</head>
<body>
  <div >
    {{count}}
    <div>
      <button @click="handleAdd">加</button>
      <button @click="handleSub">减</button>
    </div>
  </div>
  <script>
    let { createApp, ref } = Vue
    createApp({
      setup() {
        let count = ref(0)
        let handleAdd = () => {
          count.value++
        }
        let handleSub = () => {
          count.value--
        }
        return {
          count,
          handleAdd,
          handleSub
        }
      }
    }).mount('#app')
  </script>
</body>
</html>

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