class Log {
constructor() {
this.lastData = "";
}
printMax5(data) {
this.lastData = data;
if (data.length > 5) {
data = data.substring(0, 5);
}
console.log(data);
}
}
let log = new Log();
log.printMax5("1234567");
//printed "12345"
console.log("log.lastData = " + log.lastData);