install npm install file-split-merge --save
const fileSplitMerge = require('file-split-merge'); fileSplitMerge.split('/Users/mn/Desktop/zipfile.zip', 100).then(console.log); fileSplitMerge.merge( [ '/Users/mn/Desktop/zipfile.zip_0', '/Users/mn/Desktop/zipfile.zip_1', '/Users/mn/Desktop/zipfile.zip_2' ], '/Users/mn/Desktop/zipfile-new.zip' ).then(console.log)- write down the test code