Vue3.0 implements encapsulation of checkbox components

<!-- Basic component style -->
<template>
  <div class="xtx-checkbox" @click="changeChecked()">
    <i v-if="checked" class="iconfont icon-checked"></i>
    <i v-else class="iconfont icon-unchecked"></i>
    <span v-if="$slots.default"><slot /></span>
  </div>
</template>

<script>
import { ref } from 'vue'
export default {
  name: 'XtxCheckbox',
  setup () {
    const checked = ref(false)
    const changeChecked = () => {
      checked.value = !checked.value
    }
    return { checked, changeChecked }
  }
}
</script>

<style scoped lang="less"> 
 // The style can be changed as appropriate.xtx-checkbox {
  display: inline-block;
  margin-right: 2px;
  .icon-checked {
    color: @xtxColor;
    ~ span {
      color: @xtxColor;
    }
  }
  i {
    position: relative;
    top: 1px;
  }
  span {
    margin-left: 2px;
  }
}
</style>
// Note: If you need to use it globally, you need to register it as a global component

<!-- Implement the v-model directive -->
... Omit the structure <script>
import { toRef } from 'vue'
export default {
  name: 'XtxCheckbox',
  props: {
    modelValue: { // The default binding value of v-model is modelValue
      type: Boolean,
      default: false
    }
  },
  setup (props, { emit }) {
    const checked = toRef(props, 'modelValue') // Define checked to store the received boolean value const changeChecked = () => {
      emit('update:modelValue', !checked.value) // Pass the value to the parent component to check the checkbox}
    return { checked, changeChecked }
  }
}
</script>
... Elliptical style

<!-- Basic Usage -->
<!-- Custom checkbox test -->
<xtx-checkbox v-model="checked">Custom checkbox</xtx-checkbox>
<script>
import { ref } from 'vue'
export default {
  name: 'SubCategory',
  setup () {
    const checked = ref(true)
    return { checked }
  }
}
</script> 

<!-- @vueuse/core function writing -->
<template>
  <div class="xtx-checkbox" @click='checked=!checked'>
    <i v-if="checked" class="iconfont icon-checked"></i>
    <i v-else class="iconfont icon-unchecked"></i>
    <span>
      <slot />
    </span>
  </div>
</template>

<script>
import { useVModel } from '@vueuse/core' // requires npm i @vueuse/core or yarn add @vueuse/core
export default {
  name: 'XtxCheckbox',
  props: {
    modelValue: {
      type: Boolean,
      default: false
    }
  },
  setup (props, { emit }) {
    // Get the value of modelValue passed by the parent component const checked = useVModel(props, 'modelValue', emit)
    return { checked }
  }
}
</script>


// Usage method as above <xtx-checkbox v-model="checked">Custom checkbox</xtx-checkbox>
<script>
import { ref } from 'vue'
export default {
  name: 'SubCategory',
  setup () {
    const checked = ref(true)
    return { checked }
  }
}
</script>