Node.js - HK5

hk5.js

let width = 200;

function delayPrintWidth(ms) {
    let w = width
    setTimeout(() => console.log(w), ms)
}

delayPrintWidth(1000); // 預期印 200
width = 300;
delayPrintWidth(2000); // 預期印 300
width = 400;
delayPrintWidth(3000); // 預期印 400

output

200
300
400