【element-ui】el-table实现跨页多选

1、el-table添加属性row-key
2、el-table-column添加属性reserve-selection为true

<el-table :row-key="getRowKey">
	<el-table-column
	  type="selection"
	  :reserve-selection="true"
	  @selection-change="selectionChange">
	el-table-column>
el-table>

getRowKey (row) {
  return row.id
},
selectionChange (val) {
  this.currentSelection = val
}