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rahulraghavankklm/Get week number

Forked from IamSilviu/Get week number
Created July 31, 2018 09:41
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JavaScript Get week number.
Raw
Get week number
Date.prototype.getWeek = function () {
var onejan = new Date(this.getFullYear(), 0, 1);
return Math.ceil((((this - onejan) / 86400000) + onejan.getDay() + 1) / 7);
};
var myDate = new Date("2001-02-02");
myDate.getWeek(); //=> 5
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