<template>
  <input
  :value="text"
  @input="event => handleInput(event.target.value)">
</template>
<script setup>
import { ref } from 'vue';
let text = ref('')
function handleInput(newText) {
  text.value = newText;
  console.log('text:', text.value); // 用于測(cè)試數(shù)據(jù)是否發(fā)生了改變
}
</script>
<style scoped>
</style>

<input v-model="text">

<template>
  <input v-model="text" @input="changeInput">
</template>
<script setup>
import { ref } from 'vue';
let text = ref('')
// 不手動(dòng)修改，只是監(jiān)聽(tīng)文本框的值變化
function changeInput() {
  console.log('text的值發(fā)生了改變', text.value);
}
</script>
<style scoped>
</style>

<template>
  <textarea cols="30" rows="10" v-model="textContent"></textarea>
  <p>你當(dāng)前輸入的內(nèi)容為：{{ textContent }}</p>
</template>
<script setup>
import { ref } from 'vue'
const textContent = ref('')
</script>
<style scoped></style>

<template>
  <div>
    <input type="checkbox" v-model="checked" />
    <label for="checkbox">{{ checked }}</label>
  </div>
</template>
<script setup>
import { ref } from 'vue'
const checked = ref(true)
</script>
<style scoped></style>

<template>
  <div>
    <input
      type="checkbox"
      v-model="checked"
      :true-value="1"
      :false-value="0" />
    <!-- 這里的label通常為固定文本，修改為checked只是為了展示數(shù)據(jù)變化 -->
    <label for="checkbox">{{ checked }}</label>
  </div>
</template>
<script setup>
import { ref } from 'vue'
const checked = ref(1)
</script>
<style scoped></style>

<template>
  <div v-for="(item, index) in arr" :key="index">
    <label for="item.id">{{ item.title }}</label>
    <input type="checkbox" v-model="hobby" :id="item.id" :value="item.value" />
  </div>
  <p>{{ message }}</p>
</template>
<script setup>
import { ref, computed } from 'vue'
const hobby = ref([])
const arr = ref([
  { id: 'swim', title: '游泳', value: '游個(gè)泳' },
  { id: 'run', title: '跑步', value: '跑個(gè)步' },
  { id: 'game', title: '游戲', value: '玩?zhèn)€游戲' },
  { id: 'music', title: '音樂(lè)', value: '聽(tīng)個(gè)音樂(lè)' },
  { id: 'movie', title: '電影', value: '看個(gè)電影' }
])
const message = computed(() => {
  // 根據(jù) hobby 的值進(jìn)行二次計(jì)算
  if (hobby.value.length === 0) return '請(qǐng)選擇愛(ài)好'
  else return `您選擇了${hobby.value.join('、')}`
})
</script>
<style scoped></style>

<template>
  <input type="radio" id="male" v-model="gender" value="male" />
  <label for="male">男</label>
  <input type="radio" id="female" v-model="gender" value="female" />
  <label for="female">女</label>
</template>
<script setup>
import { ref } from 'vue'
const gender = ref('male')
</script>
<style scoped></style>

<template>
  <!-- 下拉列表列表是單選的話(huà)，v-model 綁定的值是一個(gè)字符串，這個(gè)字符串是 option 的 value 值 -->
  <select v-model="hometown1">
    <option value="" disabled>請(qǐng)選擇</option>
    <option v-for="(item, index) in hometownList" :key="index" :value="item.value">
      {{ item.label }}
    </option>
  </select>
  <p>您選擇的家鄉(xiāng)為：{{ hometown1 }}</p>
  <!-- 如果下拉列表是多選的話(huà)，v-model 綁定的值是一個(gè)數(shù)組，這個(gè)數(shù)組是 option 的 value 值組成的數(shù)組 -->
  <select v-model="hobbies" multiple>
    <option label="" disabled>請(qǐng)選擇</option>
    <option v-for="(item, index) in hobbyList" :key="index" :value="item.value">
      {{ item.label }}
    </option>
  </select>
  <p>按住 Ctrl (windows) / Command (Mac) 按鈕來(lái)選擇多個(gè)選項(xiàng)。</p>
  <p>您選擇的興趣為：{{ hobbies }}</p>
</template>
<script setup>
import { ref } from 'vue'
const hometown1 = ref('')
const hobbies = ref([])
const hometownList = ref([
  { value: '成都', label: '四川' },
  { value: '帝都', label: '北京' },
  { value: '魔都', label: '上海' },
  { value: '妖都', label: '廣州' },
  { value: '陪都', label: '重慶' }
])
const hobbyList = ref([
  { value: 'basketball', label: '籃球' },
  { value: 'football', label: '橄欖球' },
  { value: 'soccer', label: '足球' },
  { value: 'baseball', label: '排球' },
])
</script>
<style scoped></style>

<template>
  <!-- lazy修飾符演示 -->
  <input type="text" v-model.lazy="mess1" />
  <p>你輸入的是：{{ mess1 }}</p>
  <p>類(lèi)型為{{ typeof mess1 }}</p>
  <p>長(zhǎng)度為{{ mess1.length }}</p>
  <!-- number修飾符演示 -->
  <input type="text" v-model.number="mess2" />
  <p>你輸入的是：{{ mess2 }}</p>
  <p>類(lèi)型為{{ typeof mess2 }}</p>
  <p>長(zhǎng)度為{{ mess2.length }}</p>
  <!-- trim修飾符演示 -->
  <input type="text" v-model.trim="mess3" />
  <p>你輸入的是：{{ mess3 }}</p>
  <p>類(lèi)型為{{ typeof mess3 }}</p>
  <p>長(zhǎng)度為{{ mess3.length }}</p>
</template>
<script setup>
import { ref } from 'vue'
const mess1 = ref('')
const mess2 = ref('')
const mess3 = ref('')
</script>
<style scoped></style>