open.js

open: function(filePath) {
        return new Promise(
            function(resolve, reject) {
                const zip = new StreamZip({
                    file: filePath,
                    storeEntries: true
                })

                zip.on('ready', () => {
                    var chunks = []
                    var content = ''
                    zip.stream('word/document.xml', (err, stream) => {
                        if (err) {
                            reject(err)
                        }
                        stream.on('data', function(chunk) {
                            chunks.push(chunk)
                        })
                        stream.on('end', function() {
                            content = Buffer.concat(chunks)
                            zip.close()
                            resolve(content.toString())
                        })
                    })
                })
            }
        )
    }