JavaScriptの日付計算

code:js

const src = "2025/4/10";

const dst = "2025/5/3";

const sd = new Date(src);

const dd = new Date(dst);

const date = (dd - sd) / (60*60*24*1000);

console.log(date);

code:dayCount.js

const dayCount = (start, end) => (new Date(end) - new Date(start)) / (60*60*24*1000);