Eric Bailey
71 lines
1.9 KiB
TypeScript
71 lines
1.9 KiB
TypeScript
const NOW = 5
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const MINUTE = 60
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const HOUR = MINUTE * 60
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const DAY = HOUR * 24
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const MONTH_30 = DAY * 30
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const MONTH = DAY * 30.41675 // This results in 365.001 days in a year, which is close enough for nearly all cases
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export function ago(date: number | string | Date): string {
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let ts: number
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if (typeof date === 'string') {
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ts = Number(new Date(date))
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} else if (date instanceof Date) {
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ts = Number(date)
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} else {
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ts = date
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}
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const diffSeconds = Math.floor((Date.now() - ts) / 1e3)
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if (diffSeconds < NOW) {
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return `now`
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} else if (diffSeconds < MINUTE) {
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return `${diffSeconds}s`
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} else if (diffSeconds < HOUR) {
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return `${Math.floor(diffSeconds / MINUTE)}m`
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} else if (diffSeconds < DAY) {
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return `${Math.floor(diffSeconds / HOUR)}h`
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} else if (diffSeconds < MONTH_30) {
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return `${Math.round(diffSeconds / DAY)}d`
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} else {
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let months = diffSeconds / MONTH
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if (months % 1 >= 0.9) {
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months = Math.ceil(months)
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} else {
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months = Math.floor(months)
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}
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if (months < 12) {
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return `${months}mo`
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} else {
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return new Date(ts).toLocaleDateString()
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}
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}
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}
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export function niceDate(date: number | string | Date) {
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const d = new Date(date)
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return `${d.toLocaleDateString('en-us', {
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year: 'numeric',
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month: 'short',
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day: 'numeric',
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})} at ${d.toLocaleTimeString(undefined, {
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hour: 'numeric',
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minute: '2-digit',
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})}`
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}
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export function getAge(birthDate: Date): number {
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var today = new Date()
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var age = today.getFullYear() - birthDate.getFullYear()
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var m = today.getMonth() - birthDate.getMonth()
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if (m < 0 || (m === 0 && today.getDate() < birthDate.getDate())) {
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age--
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}
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return age
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}
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export function toSimpleDateString(date: Date) {
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const mm = date.getMonth() + 1 // 0-indexed
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const dd = date.getDate()
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const yyyy = date.getFullYear()
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return `${yyyy}-${mm}-${dd}`
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}
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