<template>
    <el-button v-on="$listeners" v-bind="$attrs" :loading="loading" @click="myClick">
        <slot></slot>
    </el-button>
</template>

<script>
export default {
    name: 'mButton',
    inheritAttrs: false,
    props: {
        debounce: {
            type: [Boolean, Number]
        }
    },
    data() {
        return {
            timer: 0,
            loading: false
        }
    },
    methods: {
        myClick() {
            if (!this.debounce) return
            this.loading = true
            clearTimeout(this.timer)
            this.timer = setTimeout(
                () => {
                    this.loading = false
                },
                typeof this.debounce === 'boolean' ? 500 : this.debounce
            )
        }
    }
}
</script>

<template>
  <el-form :disabled="disabled">
    <el-transfer
      v-bind="$attrs"
      v-on="$listeners"
    />
  </el-form>
</template>
<script>
export default {
  // 自定义穿梭框
  name: 'CustomTransfer',
  props: {
    // 禁用属性
    disabled: {
      type: Boolean,
      default: false
    }
  }
}
</script>

<template>
  <div>
    <el-image-viewer
      ref="elImageViewer"
      v-bind="$attrs"
      v-on="$listeners"
    />
  </div>
</template>

<script>
import ElImageViewer from 'element-ui/packages/image/src/image-viewer'

export default {
  name: 'ImagePreview',
  components: { ElImageViewer },
  props: {
    // 点击mask是否隐藏大图
    maskhide: {
      type: Boolean,
      default: true
    }
  },
  mounted() {
    if (this.maskhide) {
      this.addHideToMask()
    }
  },
  methods: {
    addHideToMask() {
      this.$viewer = this.$refs.elImageViewer
      if (this.$viewer) {
        // 获取遮罩层元素
        const mask = this.$viewer.$el.querySelector('.el-image-viewer__mask')
        if (mask) {
          // 遮罩层增加点击事件，关闭预览
          mask.addEventListener('click', this.hide)
          // hook卸载事件，移除之前添加在mask元素的事件
          this.$once('hook:beforeMount', () => {
            mask && mask.removeEventListener('click', this.hide)
          })
        }
      }
    },
    hide() {
      this.$viewer && this.$viewer.hide()
    }
  }
}
</script>

<style lang="scss" scoped>
::v-deep .el-image-viewer__btn.el-image-viewer__close {
  color: #fff;
}
</style>