Virtualized Table beta ​

<template>
  <el-table-v2
    :columns="columns"
    :data="data"
    :width="700"
    :height="400"
    fixed
  />
</template>

<script lang="ts" setup>
const generateColumns = (length = 10, prefix = 'column-', props?: any) =>
  Array.from({ length }).map((_, columnIndex) => ({
    ...props,
    key: `${prefix}${columnIndex}`,
    dataKey: `${prefix}${columnIndex}`,
    title: `Column ${columnIndex}`,
    width: 150,
  }))

const generateData = (
  columns: ReturnType<typeof generateColumns>,
  length = 200,
  prefix = 'row-'
) =>
  Array.from({ length }).map((_, rowIndex) => {
    return columns.reduce(
      (rowData, column, columnIndex) => {
        rowData[column.dataKey] = `Row ${rowIndex} - Col ${columnIndex}`
        return rowData
      },
      {
        id: `${prefix}${rowIndex}`,
        parentId: null,
      }
    )
  })

const columns = generateColumns(10)
const data = generateData(columns, 1000)
</script>

<template>
  <div style="height: 400px">
    <el-auto-resizer>
      <template #default="{ height, width }">
        <el-table-v2
          :columns="columns"
          :data="data"
          :width="width"
          :height="height"
          fixed
        />
      </template>
    </el-auto-resizer>
  </div>
</template>

<script lang="ts" setup>
const generateColumns = (length = 10, prefix = 'column-', props?: any) =>
  Array.from({ length }).map((_, columnIndex) => ({
    ...props,
    key: `${prefix}${columnIndex}`,
    dataKey: `${prefix}${columnIndex}`,
    title: `Column ${columnIndex}`,
    width: 150,
  }))

const generateData = (
  columns: ReturnType<typeof generateColumns>,
  length = 200,
  prefix = 'row-'
) =>
  Array.from({ length }).map((_, rowIndex) => {
    return columns.reduce(
      (rowData, column, columnIndex) => {
        rowData[column.dataKey] = `Row ${rowIndex} - Col ${columnIndex}`
        return rowData
      },
      {
        id: `${prefix}${rowIndex}`,
        parentId: null,
      }
    )
  })

const columns = generateColumns(10)
const data = generateData(columns, 200)
</script>

<template>
  <el-table-v2
    :columns="columns"
    :data="data"
    :width="700"
    :height="400"
    fixed
  />
</template>

<script lang="tsx" setup>
import { ref } from 'vue'
import dayjs from 'dayjs'
import {
  ElButton,
  ElIcon,
  ElTag,
  ElTooltip,
  TableV2FixedDir,
} from 'element-plus'
import { Timer } from '@element-plus/icons-vue'

import type { Column } from 'element-plus'

let id = 0

const dataGenerator = () => ({
  id: `random-id-${++id}`,
  name: 'Tom',
  date: '2020-10-1',
})

const columns: Column<any>[] = [
  {
    key: 'date',
    title: 'Date',
    dataKey: 'date',
    width: 150,
    fixed: TableV2FixedDir.LEFT,
    cellRenderer: ({ cellData: date }) => (
      <ElTooltip content={dayjs(date).format('YYYY/MM/DD')}>
        {
          <span class="flex items-center">
            <ElIcon class="mr-3">
              <Timer />
            </ElIcon>
            {dayjs(date).format('YYYY/MM/DD')}
          </span>
        }
      </ElTooltip>
    ),
  },
  {
    key: 'name',
    title: 'Name',
    dataKey: 'name',
    width: 150,
    align: 'center',
    cellRenderer: ({ cellData: name }) => <ElTag>{name}</ElTag>,
  },
  {
    key: 'operations',
    title: 'Operations',
    cellRenderer: () => (
      <>
        <ElButton size="small">Edit</ElButton>
        <ElButton size="small" type="danger">
          Delete
        </ElButton>
      </>
    ),
    width: 150,
    align: 'center',
  },
]

const data = ref(Array.from({ length: 200 }).map(dataGenerator))
</script>

<template>
  <div style="height: 400px">
    <el-auto-resizer>
      <template #default="{ height, width }">
        <el-table-v2
          :columns="columns"
          :data="data"
          :width="width"
          :height="height"
          fixed
        />
      </template>
    </el-auto-resizer>
  </div>
</template>

<script lang="tsx" setup>
import { ref, unref } from 'vue'
import { ElCheckbox } from 'element-plus'

import type { FunctionalComponent } from 'vue'
import type { CheckboxValueType, Column } from 'element-plus'

type SelectionCellProps = {
  value: boolean
  intermediate?: boolean
  onChange: (value: CheckboxValueType) => void
}

const SelectionCell: FunctionalComponent<SelectionCellProps> = ({
  value,
  intermediate = false,
  onChange,
}) => {
  return (
    <ElCheckbox
      onChange={onChange}
      modelValue={value}
      indeterminate={intermediate}
    />
  )
}

const generateColumns = (length = 10, prefix = 'column-', props?: any) =>
  Array.from({ length }).map((_, columnIndex) => ({
    ...props,
    key: `${prefix}${columnIndex}`,
    dataKey: `${prefix}${columnIndex}`,
    title: `Column ${columnIndex}`,
    width: 150,
  }))

const generateData = (
  columns: ReturnType<typeof generateColumns>,
  length = 200,
  prefix = 'row-'
) =>
  Array.from({ length }).map((_, rowIndex) => {
    return columns.reduce(
      (rowData, column, columnIndex) => {
        rowData[column.dataKey] = `Row ${rowIndex} - Col ${columnIndex}`
        return rowData
      },
      {
        id: `${prefix}${rowIndex}`,
        checked: false,
        parentId: null,
      }
    )
  })

const columns: Column<any>[] = generateColumns(10)
columns.unshift({
  key: 'selection',
  width: 50,
  cellRenderer: ({ rowData }) => {
    const onChange = (value: CheckboxValueType) => (rowData.checked = value)
    return <SelectionCell value={rowData.checked} onChange={onChange} />
  },

  headerCellRenderer: () => {
    const _data = unref(data)
    const onChange = (value: CheckboxValueType) =>
      (data.value = _data.map((row) => {
        row.checked = value
        return row
      }))
    const allSelected = _data.every((row) => row.checked)
    const containsChecked = _data.some((row) => row.checked)

    return (
      <SelectionCell
        value={allSelected}
        intermediate={containsChecked && !allSelected}
        onChange={onChange}
      />
    )
  },
})

const data = ref(generateData(columns, 200))
</script>

<template>
  <div style="height: 400px">
    <el-auto-resizer>
      <template #default="{ height, width }">
        <el-table-v2
          :columns="columns"
          :data="data"
          :width="width"
          :height="height"
          fixed
        />
      </template>
    </el-auto-resizer>
  </div>
</template>

<script lang="tsx" setup>
import { ref, withKeys } from 'vue'
import { ElInput } from 'element-plus'

import type { FunctionalComponent } from 'vue'
import type { Column, InputInstance } from 'element-plus'

type SelectionCellProps = {
  value: string
  intermediate?: boolean
  onChange: (value: string) => void
  onBlur: () => void
  onKeydownEnter: () => void
  forwardRef: (el: InputInstance) => void
}

const InputCell: FunctionalComponent<SelectionCellProps> = ({
  value,
  onChange,
  onBlur,
  onKeydownEnter,
  forwardRef,
}) => {
  return (
    <ElInput
      ref={forwardRef as any}
      onInput={onChange}
      onBlur={onBlur}
      onKeydown={withKeys(onKeydownEnter, ['enter'])}
      modelValue={value}
    />
  )
}

const generateColumns = (length = 10, prefix = 'column-', props?: any) =>
  Array.from({ length }).map((_, columnIndex) => ({
    ...props,
    key: `${prefix}${columnIndex}`,
    dataKey: `${prefix}${columnIndex}`,
    title: `Column ${columnIndex}`,
    width: 150,
  }))

const generateData = (
  columns: ReturnType<typeof generateColumns>,
  length = 200,
  prefix = 'row-'
) =>
  Array.from({ length }).map((_, rowIndex) => {
    return columns.reduce(
      (rowData, column, columnIndex) => {
        rowData[column.dataKey] = `Row ${rowIndex} - Col ${columnIndex}`
        return rowData
      },
      {
        id: `${prefix}${rowIndex}`,
        editing: false,
        parentId: null,
      }
    )
  })

const columns: Column<any>[] = generateColumns(10)
columns[0] = {
  ...columns[0],
  title: 'Editable Column',
  cellRenderer: ({ rowData, column }) => {
    const onChange = (value: string) => {
      rowData[column.dataKey!] = value
    }
    const onEnterEditMode = () => {
      rowData.editing = true
    }

    const onExitEditMode = () => (rowData.editing = false)
    const input = ref()
    const setRef = (el) => {
      input.value = el
      if (el) {
        el.focus?.()
      }
    }

    return rowData.editing ? (
      <InputCell
        forwardRef={setRef}
        value={rowData[column.dataKey!]}
        onChange={onChange}
        onBlur={onExitEditMode}
        onKeydownEnter={onExitEditMode}
      />
    ) : (
      <div class="table-v2-inline-editing-trigger" onClick={onEnterEditMode}>
        {rowData[column.dataKey!]}
      </div>
    )
  },
}

const data = ref(generateData(columns, 200))
</script>

<style>
.table-v2-inline-editing-trigger {
  border: 1px transparent dotted;
  padding: 4px;
}

.table-v2-inline-editing-trigger:hover {
  border-color: var(--el-color-primary);
}
</style>

<template>
  <el-table-v2
    :columns="columns"
    :data="data"
    :row-class="rowClass"
    :width="700"
    :height="400"
  />
</template>

<script lang="tsx" setup>
import { ref } from 'vue'
import dayjs from 'dayjs'
import {
  ElButton,
  ElIcon,
  ElTag,
  ElTooltip,
  TableV2FixedDir,
} from 'element-plus'
import { Timer } from '@element-plus/icons-vue'

import type { Column, RowClassNameGetter } from 'element-plus'

let id = 0

const dataGenerator = () => ({
  id: `random-id-${++id}`,
  name: 'Tom',
  date: '2020-10-1',
})

const columns: Column<any>[] = [
  {
    key: 'date',
    title: 'Date',
    dataKey: 'date',
    width: 150,
    fixed: TableV2FixedDir.LEFT,
    cellRenderer: ({ cellData: date }) => (
      <ElTooltip content={dayjs(date).format('YYYY/MM/DD')}>
        {
          <span class="flex items-center">
            <ElIcon class="mr-3">
              <Timer />
            </ElIcon>
            {dayjs(date).format('YYYY/MM/DD')}
          </span>
        }
      </ElTooltip>
    ),
  },
  {
    key: 'name',
    title: 'Name',
    dataKey: 'name',
    width: 150,
    align: 'center',
    cellRenderer: ({ cellData: name }) => <ElTag>{name}</ElTag>,
  },
  {
    key: 'operations',
    title: 'Operations',
    cellRenderer: () => (
      <>
        <ElButton size="small">Edit</ElButton>
        <ElButton size="small" type="danger">
          Delete
        </ElButton>
      </>
    ),
    width: 150,
    align: 'center',
    flexGrow: 1,
  },
]

const data = ref(Array.from({ length: 200 }).map(dataGenerator))

const rowClass = ({ rowIndex }: Parameters<RowClassNameGetter<any>>[0]) => {
  if (rowIndex % 10 === 5) {
    return 'bg-red-100'
  } else if (rowIndex % 10 === 0) {
    return 'bg-blue-200'
  }
  return ''
}
</script>

<template>
  <el-table-v2
    :columns="columns"
    :data="tableData"
    :fixed-data="fixedData"
    :width="700"
    :height="400"
    :row-class="rowClass"
    fixed
    @scroll="onScroll"
  />
</template>

<script lang="ts" setup>
import { computed, ref } from 'vue'

const generateColumns = (length = 10, prefix = 'column-', props?: any) =>
  Array.from({ length }).map((_, columnIndex) => ({
    ...props,
    key: `${prefix}${columnIndex}`,
    dataKey: `${prefix}${columnIndex}`,
    title: `Column ${columnIndex}`,
    width: 150,
  }))

const generateData = (
  columns: ReturnType<typeof generateColumns>,
  length = 200,
  prefix = 'row-'
) =>
  Array.from({ length }).map((_, rowIndex) => {
    return columns.reduce(
      (rowData, column, columnIndex) => {
        rowData[column.dataKey] = `Row ${rowIndex} - Col ${columnIndex}`
        return rowData
      },
      {
        id: `${prefix}${rowIndex}`,
        parentId: null,
      }
    )
  })

const columns = generateColumns(10)
const data = generateData(columns, 200)

const rowClass = ({ rowIndex }) => {
  if (rowIndex < 0 || (rowIndex + 1) % 5 === 0) return 'sticky-row'
}

const stickyIndex = ref(0)

const fixedData = computed(() =>
  data.slice(stickyIndex.value, stickyIndex.value + 1)
)

const tableData = computed(() => {
  return data.slice(1)
})

const onScroll = ({ scrollTop }) => {
  stickyIndex.value = Math.floor(scrollTop / 250) * 5
}
</script>

<style>
.el-el-table-v2__fixed-header-row {
  background-color: var(--el-color-primary-light-5);
  font-weight: bold;
}
</style>

<template>
  <el-table-v2
    :columns="columns"
    :data="data"
    :sort-by="sortBy"
    :width="700"
    :height="400"
    fixed
    @column-sort="onSort"
  />
</template>

<script lang="ts" setup>
import { ref } from 'vue'
import { TableV2FixedDir, TableV2SortOrder } from 'element-plus'

import type { SortBy } from 'element-plus'

const generateColumns = (length = 10, prefix = 'column-', props?: any) =>
  Array.from({ length }).map((_, columnIndex) => ({
    ...props,
    key: `${prefix}${columnIndex}`,
    dataKey: `${prefix}${columnIndex}`,
    title: `Column ${columnIndex}`,
    width: 150,
  }))

const generateData = (
  columns: ReturnType<typeof generateColumns>,
  length = 200,
  prefix = 'row-'
) =>
  Array.from({ length }).map((_, rowIndex) => {
    return columns.reduce(
      (rowData, column, columnIndex) => {
        rowData[column.dataKey] = `Row ${rowIndex} - Col ${columnIndex}`
        return rowData
      },
      {
        id: `${prefix}${rowIndex}`,
        parentId: null,
      }
    )
  })

const columns = generateColumns(10)
let data = generateData(columns, 200)

columns[0].fixed = true
columns[1].fixed = TableV2FixedDir.LEFT
columns[9].fixed = TableV2FixedDir.RIGHT

for (let i = 0; i < 3; i++) columns[i].sortable = true

const sortBy = ref<SortBy>({
  key: 'column-0',
  order: TableV2SortOrder.ASC,
})

const onSort = (_sortBy: SortBy) => {
  data = data.reverse()
  sortBy.value = _sortBy
}
</script>

<template>
  <el-table-v2
    fixed
    :columns="fixedColumns"
    :data="data"
    :header-height="[50, 40, 50]"
    :header-class="headerClass"
    :width="700"
    :height="400"
  >
    <template #header="props">
      <customized-header v-bind="props" />
    </template>
  </el-table-v2>
</template>
<script lang="tsx" setup>
import { TableV2FixedDir, TableV2Placeholder } from 'element-plus'

import type { FunctionalComponent } from 'vue'
import type {
  HeaderClassNameGetter,
  TableV2CustomizedHeaderSlotParam,
} from 'element-plus'

const generateColumns = (length = 10, prefix = 'column-', props?: any) =>
  Array.from({ length }).map((_, columnIndex) => ({
    ...props,
    key: `${prefix}${columnIndex}`,
    dataKey: `${prefix}${columnIndex}`,
    title: `Column ${columnIndex}`,
    width: 150,
  }))

const generateData = (
  columns: ReturnType<typeof generateColumns>,
  length = 200,
  prefix = 'row-'
) =>
  Array.from({ length }).map((_, rowIndex) => {
    return columns.reduce(
      (rowData, column, columnIndex) => {
        rowData[column.dataKey] = `Row ${rowIndex} - Col ${columnIndex}`
        return rowData
      },
      {
        id: `${prefix}${rowIndex}`,
        parentId: null,
      }
    )
  })
const columns = generateColumns(15)
const data = generateData(columns, 200)

const fixedColumns = columns.map((column, columnIndex) => {
  let fixed: TableV2FixedDir | undefined = undefined
  if (columnIndex < 3) fixed = TableV2FixedDir.LEFT
  if (columnIndex > 12) fixed = TableV2FixedDir.RIGHT
  return { ...column, fixed, width: 100 }
})

const CustomizedHeader: FunctionalComponent<
  TableV2CustomizedHeaderSlotParam
> = ({ cells, columns, headerIndex }) => {
  if (headerIndex === 2) return cells

  const groupCells = [] as typeof cells
  let width = 0
  let idx = 0

  columns.forEach((column, columnIndex) => {
    if (column.placeholderSign === TableV2Placeholder)
      groupCells.push(cells[columnIndex])
    else {
      width += cells[columnIndex].props!.column.width
      idx++

      const nextColumn = columns[columnIndex + 1]
      if (
        columnIndex === columns.length - 1 ||
        nextColumn.placeholderSign === TableV2Placeholder ||
        idx === (headerIndex === 0 ? 4 : 2)
      ) {
        groupCells.push(
          <div
            class="flex items-center justify-center custom-header-cell"
            role="columnheader"
            style={{
              ...cells[columnIndex].props!.style,
              width: `${width}px`,
            }}
          >
            Group width {width}
          </div>
        )
        width = 0
        idx = 0
      }
    }
  })
  return groupCells
}

const headerClass = ({
  headerIndex,
}: Parameters<HeaderClassNameGetter<any>>[0]) => {
  if (headerIndex === 1) return 'el-primary-color'
  return ''
}
</script>

<style>
.el-el-table-v2__header-row .custom-header-cell {
  border-right: 1px solid var(--el-border-color);
}

.el-el-table-v2__header-row .custom-header-cell:last-child {
  border-right: none;
}

.el-primary-color {
  background-color: var(--el-color-primary);
  color: var(--el-color-white);
  font-size: 14px;
  font-weight: bold;
}

.el-primary-color .custom-header-cell {
  padding: 0 4px;
}
</style>

<template>
  <el-table-v2
    fixed
    :columns="fixedColumns"
    :data="data"
    :width="700"
    :height="400"
  />
</template>
<script lang="tsx" setup>
import { ref } from 'vue'
import {
  ElButton,
  ElCheckbox,
  ElIcon,
  ElPopover,
  TableV2FixedDir,
} from 'element-plus'
import { Filter } from '@element-plus/icons-vue'

import type { HeaderCellSlotProps } from 'element-plus'

const generateColumns = (length = 10, prefix = 'column-', props?: any) =>
  Array.from({ length }).map((_, columnIndex) => ({
    ...props,
    key: `${prefix}${columnIndex}`,
    dataKey: `${prefix}${columnIndex}`,
    title: `Column ${columnIndex}`,
    width: 150,
  }))

const generateData = (
  columns: ReturnType<typeof generateColumns>,
  length = 200,
  prefix = 'row-'
) =>
  Array.from({ length }).map((_, rowIndex) => {
    return columns.reduce(
      (rowData, column, columnIndex) => {
        rowData[column.dataKey] = `Row ${rowIndex} - Col ${columnIndex}`
        return rowData
      },
      {
        id: `${prefix}${rowIndex}`,
        parentId: null,
      }
    )
  })
const columns = generateColumns(10)
const data = ref(generateData(columns, 200))

const shouldFilter = ref(false)
const popoverRef = ref()

const onFilter = () => {
  popoverRef.value.hide()
  if (shouldFilter.value) {
    data.value = generateData(columns, 100, 'filtered-')
  } else {
    data.value = generateData(columns, 200)
  }
}

const onReset = () => {
  shouldFilter.value = false
  onFilter()
}

columns[0].headerCellRenderer = (props: HeaderCellSlotProps) => {
  return (
    <div class="flex items-center justify-center">
      <span class="mr-2 text-xs">{props.column.title}</span>
      <ElPopover ref={popoverRef} trigger="click" {...{ width: 200 }}>
        {{
          default: () => (
            <div class="filter-wrapper">
              <div class="filter-group">
                <ElCheckbox v-model={shouldFilter.value}>
                  Filter Text
                </ElCheckbox>
              </div>
              <div class="el-table-v2__demo-filter">
                <ElButton text onClick={onFilter}>
                  Confirm
                </ElButton>
                <ElButton text onClick={onReset}>
                  Reset
                </ElButton>
              </div>
            </div>
          ),
          reference: () => (
            <ElIcon class="cursor-pointer">
              <Filter />
            </ElIcon>
          ),
        }}
      </ElPopover>
    </div>
  )
}

const fixedColumns = columns.map((column, columnIndex) => {
  let fixed: TableV2FixedDir | undefined = undefined
  if (columnIndex < 2) fixed = TableV2FixedDir.LEFT
  if (columnIndex > 9) fixed = TableV2FixedDir.RIGHT
  return { ...column, fixed, width: 100 }
})
</script>

<style>
.el-table-v2__demo-filter {
  border-top: var(--el-border);
  margin: 12px -12px -12px;
  padding: 0 12px;
  display: flex;
  justify-content: space-between;
}
</style>

<template>
  <el-table-v2
    :columns="columns"
    :data="data"
    :sort-by="sortState"
    :width="700"
    :height="400"
    fixed
    @column-sort="onSort"
  />
</template>

<script lang="ts" setup>
import { ref } from 'vue'
import { TableV2SortOrder } from 'element-plus'
import type { SortBy } from 'element-plus'

const generateColumns = (length = 10, prefix = 'column-', props?: any) =>
  Array.from({ length }).map((_, columnIndex) => ({
    ...props,
    key: `${prefix}${columnIndex}`,
    dataKey: `${prefix}${columnIndex}`,
    title: `Column ${columnIndex}`,
    width: 150,
  }))

const generateData = (
  columns: ReturnType<typeof generateColumns>,
  length = 200,
  prefix = 'row-'
) =>
  Array.from({ length }).map((_, rowIndex) => {
    return columns.reduce(
      (rowData, column, columnIndex) => {
        rowData[column.dataKey] = `Row ${rowIndex} - Col ${columnIndex}`
        return rowData
      },
      {
        id: `${prefix}${rowIndex}`,
        parentId: null,
      }
    )
  })

const columns = generateColumns(10)
let data = generateData(columns, 200)

columns[0].sortable = true

const sortState = ref<SortBy>({
  key: 'column-0',
  order: TableV2SortOrder.ASC,
})

const onSort = (sortBy: SortBy) => {
  console.log(sortBy)
  data = data.reverse()
  sortState.value = sortBy
}
</script>

<template>
  <el-table-v2
    v-model:sort-state="sortState"
    :columns="columns"
    :data="data"
    :width="700"
    :height="400"
    fixed
    @column-sort="onSort"
  />
</template>

<script lang="ts" setup>
import { ref } from 'vue'
import { TableV2SortOrder } from 'element-plus'
import type { SortBy, SortState } from 'element-plus'

const generateColumns = (length = 10, prefix = 'column-', props?: any) =>
  Array.from({ length }).map((_, columnIndex) => ({
    ...props,
    key: `${prefix}${columnIndex}`,
    dataKey: `${prefix}${columnIndex}`,
    title: `Column ${columnIndex}`,
    width: 150,
  }))

const generateData = (
  columns: ReturnType<typeof generateColumns>,
  length = 200,
  prefix = 'row-'
) =>
  Array.from({ length }).map((_, rowIndex) => {
    return columns.reduce(
      (rowData, column, columnIndex) => {
        rowData[column.dataKey] = `Row ${rowIndex} - Col ${columnIndex}`
        return rowData
      },
      {
        id: `${prefix}${rowIndex}`,
        parentId: null,
      }
    )
  })

const columns = generateColumns(10)
const data = ref(generateData(columns, 200))

columns[0].sortable = true
columns[1].sortable = true

const sortState = ref<SortState>({
  'column-0': TableV2SortOrder.DESC,
  'column-1': TableV2SortOrder.ASC,
})

const onSort = ({ key, order }: SortBy) => {
  sortState.value[key] = order
  data.value = data.value.reverse()
}
</script>

<template>
  <div style="height: 400px">
    <el-auto-resizer>
      <template #default="{ height, width }">
        <el-table-v2
          :columns="columns"
          :cell-props="cellProps"
          :class="kls"
          :data="data"
          :width="width"
          :height="height"
        />
      </template>
    </el-auto-resizer>
  </div>
</template>

<script lang="ts" setup>
import { ref } from 'vue'

const generateColumns = (length = 10, prefix = 'column-', props?: any) =>
  Array.from({ length }).map((_, columnIndex) => ({
    ...props,
    key: `${prefix}${columnIndex}`,
    dataKey: `${prefix}${columnIndex}`,
    title: `Column ${columnIndex}`,
    width: 150,
  }))

const generateData = (
  columns: ReturnType<typeof generateColumns>,
  length = 200,
  prefix = 'row-'
) =>
  Array.from({ length }).map((_, rowIndex) => {
    return columns.reduce(
      (rowData, column, columnIndex) => {
        rowData[column.dataKey] = `Row ${rowIndex} - Col ${columnIndex}`
        return rowData
      },
      {
        id: `${prefix}${rowIndex}`,
        parentId: null,
      }
    )
  })

const columns = generateColumns(10)
columns.unshift({
  key: 'column-n-1',
  width: 50,
  title: 'Row No.',
  cellRenderer: ({ rowIndex }) => `${rowIndex + 1}`,
  align: 'center',
})
const data = generateData(columns, 200)

const cellProps = ({ columnIndex }) => {
  const key = `hovering-col-${columnIndex}`
  return {
    ['data-key']: key,
    onMouseenter: () => {
      kls.value = key
    },
    onMouseleave: () => {
      kls.value = ''
    },
  }
}

const kls = ref<string>('')
</script>

<style>
.hovering-col-0 [data-key='hovering-col-0'],
.hovering-col-1 [data-key='hovering-col-1'],
.hovering-col-2 [data-key='hovering-col-2'],
.hovering-col-3 [data-key='hovering-col-3'],
.hovering-col-4 [data-key='hovering-col-4'],
.hovering-col-5 [data-key='hovering-col-5'],
.hovering-col-6 [data-key='hovering-col-6'],
.hovering-col-7 [data-key='hovering-col-7'],
.hovering-col-8 [data-key='hovering-col-8'],
.hovering-col-9 [data-key='hovering-col-9'],
.hovering-col-10 [data-key='hovering-col-10'] {
  background: var(--el-table-row-hover-bg-color);
}

[data-key='hovering-col-0'] {
  font-weight: bold;
  user-select: none;
  pointer-events: none;
}
</style>