使用Vue封装一个checkbox、checkboxGroup组件

1. checkbox.vue 组件

<template>
  <label class="one-checkbox" :class="{' is-checked':isChecked}">
      <span class="one-check_input">
          <span class="one-check_inner"></span>
          <input type="checkbox" 
          class="one-checkbox_original"
          :name="name"
          v-model="model"
          :value="label">
      </span>
      <span class="one-checkbox_label">
        <slot></slot>
        <template v-if="!$slots.default">
            {{label}}
        </template>
      </span>
  </label>
</template>
<script>
export default {
    name:'oneCheckbox',
    data(){
        return {
           
        }
    },
    inject:{
        CheckboxGroup: {
            default:''
        }
    },
    props:{
        label: {
            type: String,
            default: ''
        },
        value: {
            type: Boolean,
            default: false
        },
        name: {
            type: String,
            default: ''
        }
    },
    computed:{
        model:{
            get(){
                // return this.value
                return this.isGroup ? this.CheckboxGroup.value : this.value
            },
            set(value) {
                // this.$emit('input',value)
                this.isGroup ? this.CheckboxGroup.$emit('input',value) : this.$emit('input',value)
                console.log('value:',value);
            },
        },
        isGroup(){
            return !!this.CheckboxGroup
        },  
        isChecked(){
            // 如果有group包裹，判断label是否在model中
            // 如果没有group包裹，直接使用model
            return this.isGroup ? this.model.includes(this.label) : this.model
        }
    }
}
</script>

<style lang="scss" scoped>
.one-checkbox{
    color: #606266;
    font-weight: 500;
    font-size: 14px;
    position: relative;
    cursor: pointer;
    display: inline-block;
    white-space: nowrap;
    user-select: none;
    margin-right: 30px;
    .one-checkbox_input{
      white-space: nowrap;
      cursor: pointer;
      outline: none;
      display: inline-block;
      line-height: 1;
      position: relative;
      vertical-align: middle;
      .one-checkbox_inner{
        display: inline-block;
        position: relative;
        border: 1px solid #dcdfe6;
        border-radius: 2px;
        box-sizing: border-box;
        width: 14px;
        height: 14px;
        background-color: #fff;
        z-index: 1;
        transition: border-color .25s cubic-bezier(.71,-.46,.29,1.46),background-color .25s,cubic-bezier(.71,-.46,.29,1.46);
        &:after{
          box-sizing: content-box;
          content: '';
          border: 1px solid #ffffff;
          border-left: 0;
          border-top: 0;
          height: 7px;
          left: 4px;
          position: absolute;
          top: 1px;
          transform: rotate(45deg) scaleY(0);
          width: 3px;
          transition: transform .15s ease-in .05s;
          transform-origin: center;
        }
      }
      .one-checkbox_original{
        opacity: 0;
        outline: none;
        position: absolute;
        left: 10px;
        margin: 0;
        width: 0;
        height: 0;
        z-index: -1;
      }
    }
    .one-checkbox_label{
      display: inline-block;
      padding-left: 10px;
      line-height: 19px;
      font-size: 14px;
    }
  }
  // 选中的样式
  .one-checkbox.is-checked{
    .one-checkbox_input{
      .one-checkbox_inner{
        background-color: #409eff;
        border-color: #409eff;
      }
      &:after{
        transform: rotate(45deg) scaleY(1);
      }
    }
    .one-checkbox_label{
      color: #409eff;
    }
  }
</style>

---

2. checkbox-group.vue 组件

<template>
  <div class="one-checkbox-group">
      <slot></slot>
    </div>
</template>

<script>
export default {
    name:'oneCheckboxGroup',
    props:{
        value:{
            type: Array
        }
    },
    provide(){
        return {
            CheckboxGroup: this
        }
    }
}
</script>

<style>

</style>

3. App.vue中使用：

<one-checkbox-group  v-model="hobby">
    <one-checkbox 
    label="抽烟" 
   >
    </one-checkbox>
    <one-checkbox 
    label="喝酒" 
   >
    </one-checkbox>
    <one-checkbox 
    label="烫头" 
   >
    </one-checkbox>
</one-checkbox-group>

data(){
    return {
      hobby:['抽烟','喝酒','烫头'] 
    }
  }