Customize js Read file Excel Import to Kintone

i want read file excel by customize js for get data import to kintone. please help me!

 Would you like to import the data from an excel file?
If so,  please refer the following link  “Importing Records from a File”, which explains how to do it without customizing a Kintone app with a Javascript file.
 Please make sure that you have the permission “Import from file” on your app to perform the task.