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fix current week calculation

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This commit is contained in:
Frank Adaemmer 2023-05-21 07:44:31 +02:00
parent fa8ac8c9d8
commit ccbaa079d3
1 changed files with 10 additions and 2 deletions
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12
index.html
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@ -1,5 +1,6 @@
<!DOCTYPE html>
<html>
<head>
<title>Mappersons</title>
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.3/dist/leaflet.css"
@ -70,8 +71,15 @@
<script src="jquery-ui.js"></script>
<script>
Date.prototype.getWeek = function () {
var onejan = new Date(this.getFullYear(), 0, 1);
return Math.ceil((((this - onejan) / 86400000) + onejan.getDay() + 1) / 7);
var d = new Date(Date.UTC(this.getFullYear(), this.getMonth(), this.getDate()));
// Set to nearest Thursday: current date + 4 - current day number
// Make Sunday's day number 7
d.setUTCDate(d.getUTCDate() + 4 - (d.getUTCDay() || 7));
// Get first day of year
var yearStart = new Date(Date.UTC(d.getUTCFullYear(), 0, 1));
// Calculate full weeks to nearest Thursday
var weekNo = Math.ceil((((d - yearStart) / 86400000) + 1) / 7);
return weekNo
}
// Set initial date to current calendar week and year
// Initialize slider with current calendar week and year