class Log {
public lastData = ""
printMax5(data: string) {
this.lastData = data
if (data.length > 5) {
data = data.substring(0, 5)
}
console.log(`data is ${data}`)
}
}
let log = new Log()
log.printMax5("1234567")
//printed "12345"
console.log("lastData is " + log.lastData)