Add days to JavaScript Date

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Tue Jul 07 2020 12:33:19 GMT+0000 (Coordinated Universal Time)

Date.prototype.addDays = function(days) {
    var date = new Date(this.valueOf());
    date.setDate(date.getDate() + days);
    return date;
}

var date = new Date();

alert(date.addDays(5));

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https://stackoverflow.com/questions/563406/add-days-to-javascript-date

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Add days to JavaScript Date

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