<script setup> import { ref, onMounted } from "vue"; let count = ref(0); const increase = () => { count++; }; onMounted(() => { increase(); console.log("count", count.value); }); </script>

在这个示例中，我们使用了Vue 3的`<script setup>`语法来定义组件。我们使用了`ref`函数来创建一个响应式变量`count`，并将其初始值设为0。然后，我们定义了一个函数`increase`，它会将`count`的值增加1。

在`onMounted`钩子函数中，我们调用了`increase`函数，将`count`的值增加1，并输出`count`的值。注意，我们在`increase`函数中使用了`count++`，这是不正确的方式。正确的方式应该是使用`count.value++`来修改`count`的值。

因此，示例代码应该修改为如下所示：

<script setup>
  import { ref, onMounted } from "vue";
  let count = ref(0);
  const increase = () => {
    count.value++;
  };
  onMounted(() => {
    increase();
    console.log("count", count.value);
  });
</script>

这样，我们就可以正确地将`count`的值增加1，并输出`count`的值了。

相关问题

vue3、ts 项目中，组件<houseCard v-for="i in 10" :key="i" :houseCardData="cardData"/> <script>const cardData = ref<Array<object>>([{id:1,name:'二手房'},{id:1,name:'租房'}]);</script> 组件页面<script setup lang="ts"> import { onMounted, ref } from 'vue' export interface cardDataProps { } const props = withDefaults(defineProps<HouseCardData>(), { })</script> 如何接收这个对象值

在组件页面的 `<script setup>` 中，你可以使用 `defineProps` 来声明 `props` 对象，并指定其类型为 `HouseCardData`：

<script setup lang="ts">
import { onMounted, ref, defineProps } from 'vue'

interface HouseCardData {
  id: number;
  name: string;
}

const props = defineProps<HouseCardData>({
  houseCardData: {
    type: Array as () => Array<HouseCardData>,
    required: true
  }
});

const cardData = ref(props.houseCardData);

onMounted(() => {
  console.log(cardData.value);
});

export default {
  props,
  setup() {
    return {
      cardData
    }
  }
}
</script>

在上面的代码中，我们使用 `defineProps` 来声明 `props` 对象，并指定其类型为 `HouseCardData`。我们还在 `setup` 函数中创建了一个 `ref` 对象，将传递进来的 `houseCardData` 值赋值给它。最后，我们使用 `onMounted` 钩子函数输出一下 `cardData` 的值，以验证是否成功接收到传递进来的值。在导出组件时，我们将 `props` 对象添加到组件的配置中。

<script setup> import HelloWorld from './components/HelloWorld.vue' import TheWelcome from './components/TheWelcome.vue' </script> <template> <div class='container' ref='container'></div> </template> <script> import * as THREE from "three"; import {ref} from "vue"; import {onMounted} from "vue"; import {OrbitControls} from "three/examples/jsm/controls/OrbitControls" const scene=new THREE.Scene() const camera=new THREE.PerspectiveCamera(75,window.innerWidth/window.innerHeight,0.1,1000) camera.position.z=5 const renderer=new THREE.WebGLRenderer() renderer.setSize(window.innerWidth,window.innerHeight) const geometry=new THREE.BoxGeometry(1,1,1) const material=new THREE.MeshBasicMaterial({color:0x00ff00}) const cube=new THREE.Mesh(geometry,material) scene.add(cube) function render(){ renderer.render(scene, camera); requestAnimationFrame(render); } const container=ref(null) function fun(){ const controls=new OrbitControls(camera,container.value) controls.enableDamping=true container.value.appendChild(renderer.domElement); render() } onMounted(fun); </script> <style > *{ margin:0; padding:0; } .container{ height:100vh; width:100vw; bcakground-color:#f0f0f0; } </style>帮我检查以上代码并改正

在代码中，`bcakground-color`应该改为`background-color`，以修正样式错误。此外，需要将组件导入语句放入`<script>`标签中，并且将组件添加到模板中，以便正确地渲染组件。修改后的代码如下：

<template>
  <div class="container" ref="container">
    <HelloWorld />
    <TheWelcome />
  </div>
</template>

<script>
  import * as THREE from "three";
  import { ref } from "vue";
  import { onMounted } from "vue";
  import { OrbitControls } from "three/examples/jsm/controls/OrbitControls";
  import HelloWorld from './components/HelloWorld.vue';
  import TheWelcome from './components/TheWelcome.vue';

  const scene = new THREE.Scene();
  const camera = new THREE.PerspectiveCamera(
    75,
    window.innerWidth / window.innerHeight,
    0.1,
    1000
  );
  camera.position.z = 5;
  const renderer = new THREE.WebGLRenderer();
  renderer.setSize(window.innerWidth, window.innerHeight);
  const geometry = new THREE.BoxGeometry(1, 1, 1);
  const material = new THREE.MeshBasicMaterial({ color: 0x00ff00 });
  const cube = new THREE.Mesh(geometry, material);
  scene.add(cube);

  function render() {
    renderer.render(scene, camera);
    requestAnimationFrame(render);
  }

  const container = ref(null);

  function fun() {
    const controls = new OrbitControls(camera, container.value);
    controls.enableDamping = true;
    container.value.appendChild(renderer.domElement);
    render();
  }

  export default {
    components: {
      HelloWorld,
      TheWelcome
    },
    setup() {
      onMounted(fun);
    },
    setup() {
      onMounted(fun);
    },
  };
</script>

<style>
  * {
    margin: 0;
    padding: 0;
  }

  .container {
    height: 100vh;
    width: 100vw;
    background-color: #f0f0f0;
  }
</style>