增加注释

-/*
- * FileName: lb-render.vue
- * Remark: 自定义render
- * Project: lb-element-table
- * Author: 任超
- * File Created: Tuesday, 19th March 2019 10:15:30 am
- * Last Modified: Tuesday, 19th March 2019 10:15:32 am
- * Modified By: 任超
- */
-<script>
-export default {
-  name: 'LbRender',
-  functional: true,
-  props: {
-    scope: Object,
-    render: Function
-  },
-  render: (h, ctx) => {
-    return ctx.props.render ? ctx.props.render(h, ctx.props.scope) : ''
-  }
-}
-</script>

-export default {
-  selection: {
-    renderHeader: (h, { store }) => {
-      return (
-        <el-checkbox
-          disabled={store.states.data && store.states.data.length === 0}
-          indeterminate={
-            store.states.selection.length > 0 && !store.states.isAllSelected
-          }
-          nativeOn-click={store.toggleAllSelection}
-          value={store.states.isAllSelected}
-        />
-      )
-    },
-    renderCell: (h, { row, column, store, $index }) => {
-      return (
-        <el-checkbox
-          nativeOn-click={event => event.stopPropagation()}
-          value={store.isSelected(row)}
-          disabled={
-            column.selectable
-              ? !column.selectable.call(null, row, $index)
-              : false
-          }
-          on-input={() => {
-            store.commit('rowSelectedChanged', row)
-          }}
-        />
-      )
-    },
-    sortable: false,
-    resizable: false
-  },
-  index: {
-    renderHeader: (h, scope) => {
-      return <span>{scope.column.label || '#'}</span>
-    },
-    renderCell: (h, { $index, column }) => {
-      let i = $index + 1
-      const index = column.index
-
-      if (typeof index === 'number') {
-        i = $index + index
-      } else if (typeof index === 'function') {
-        i = index($index)
-      }
-
-      return <div>{i}</div>
-    },
-    sortable: false
-  },
-  expand: {
-    renderHeader: (h, scope) => {
-      return <span>{scope.column.label || ''}</span>
-    },
-    renderCell: (h, { row, store }, proxy) => {
-      const expanded = store.states.expandRows.indexOf(row) > -1
-      return (
-        <div
-          class={
-            'el-table__expand-icon ' +
-            (expanded ? 'el-table__expand-icon--expanded' : '')
-          }
-          on-click={e => proxy.handleExpandClick(row, e)}
-        >
-          <i class='el-icon el-icon-arrow-right' />
-        </div>
-      )
-    },
-    sortable: false,
-    resizable: false,
-    className: 'el-table__expand-column'
-  }
-}

-## 这是对于element-table 进行的二次封装 
-
-### 文档地址
-
-<!-- table 已经全局注册不需要每个页面单独注册 -->
-
-[Windows/Mac/Linux 全平台客户端](https://github.liubing.me/lb-element-table/zh/guide/)