How to use 'javascript week number' in JavaScript
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4 function getWeek(d) { var a = new Date(d.getFullYear(), 0, 1); return Math.ceil(((d - a) / 864E5 + a.getDay() + 1) / 7); }
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276 function formatWeekNumber(num: number, weekLabel: string, locale: Locale, display?: 'numeric' | 'narrow' | 'short'): string { 277 let parts = [] 278 279 if (display === 'narrow') { 280 parts.push(weekLabel) 281 } else if (display === 'short') { 282 parts.push(weekLabel, ' ') 283 } 284 // otherwise, considered 'numeric' 285 286 parts.push(locale.simpleNumberFormat.format(num)) 287 288 if (locale.options.isRtl) { // TODO: use control characters instead? 289 parts.reverse() 290 } 291 292 return parts.join('') 293 }