45 lines
1.3 KiB
HTML
45 lines
1.3 KiB
HTML
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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<!-- 1. 导入vue.js的脚本文件 -->
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<script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
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</head>
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<body>
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<div id="app">
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<button @click="increment">增加</button>
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<p>{{count}}</p>
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<p>{{state.counter}}</p>
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</div>
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</body>
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<script>
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// 将 Vue 对象中的createApp reactive 属性赋值给createApp reactive
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const { createApp, reactive, ref } = Vue; // 解构赋值语法
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// ref 适用于基本类型(字符串、数字、布尔值)
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// reactive 适用于对象、数组等复合类型
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// 创建一个 Vue 的应用程序
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createApp({
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// 组合式API 的 setup 用于设置响应式数据和方法
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setup() {
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const count = ref(0);
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const state = reactive({ counter: 0 });
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// 箭头函数
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const increment = () => {
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count.value++;
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state.counter++;
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}
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// 返回数据
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return {
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count, increment, state
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}
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}
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}).mount('#app') // 将 Vue 应用程序挂载到app元素上
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</script>
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</html>
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