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var dates = [];
dates.push(new Date("2011-06-25")); // I change "/" to "-" in "2011/06/25"
dates.push(new Date("2011-06-26")); // because conosle log write dates
dates.push(new Date("2011-06-27")); // using "-".
dates.push(new Date("2011-06-28"));
var min= dates.sort((a,b)=>a-b)[0], max= dates.slice(-1)[0];
console.log({min,max});
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