Add support for excel exporting

We need an additional property in downloadOptions for user to specify csv or excel format when exporting only filtered data.

[jaime-ez]

Hi, I’m just gonna leave here a comment with a solution for exporting excel files in case anyone finds it useful:

import { saveAs } from 'file-saver'
import { write, utils } from 'xlsx'

// on the table component
                      onDownload: (buildHead, buildBody, columns, values) => {
                        const fileType = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=UTF-8'
                        const fileExtension = '.xlsx'
                        // build the json, this is one way to do it
                        const json = reduce(values, (result, val) => {
                          const temp = {}
                          forEach(val.data, (v, idx) => {
                            temp[columns[idx].name] = v
                          })
                          result.push(temp)
                          return result
                        }, [])

                        const fileName = `$yourFileName`
                        const ws = utils.json_to_sheet(json)
                        const wb = { Sheets: { 'data': ws }, SheetNames: ['data'] }
                        const excelBuffer = write(wb, { bookType: 'xlsx', type: 'array' })
                        const data = new Blob([excelBuffer], { type: fileType })
                        saveAs(data, fileName + fileExtension)
                        // cancel default  CSV download from table
                        return false
                     }

If this should be somehwere else please let me know to make a pull.

Best

[jaime-ez]

Oh yes sorry, I was using lodash’s reduce. Thanks for the label customization