40 lines
1.3 KiB
TypeScript
40 lines
1.3 KiB
TypeScript
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/**
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* 将 UTC ISO 字符串转换为北京时间（UTC+8）的日期/日期时间字符串
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*/
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const BJ_OFFSET = 8 * 60 * 60 * 1000 // UTC+8
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function _parse(iso: string | null | undefined): Date | null {
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if (!iso) return null
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const d = new Date(iso)
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return isNaN(d.getTime()) ? null : d
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}
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/** "2026-07-11" */
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export function toBeijingDate(iso: string | null | undefined): string {
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const d = _parse(iso)
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if (!d) return ''
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return new Date(d.getTime() + BJ_OFFSET).toISOString().slice(0, 10)
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}
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/** "2026-07-11 20:30" */
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export function toBeijingDateTime(iso: string | null | undefined): string {
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const d = _parse(iso)
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if (!d) return ''
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return new Date(d.getTime() + BJ_OFFSET).toISOString().slice(0, 16).replace('T', ' ')
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}
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/** "2026-07-11 20:30" （别名） */
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export const formatDateTime = toBeijingDateTime
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/** 相对时间：刚刚 / N 分钟前 / N 小时前 / N 天前 */
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export function relativeTime(iso: string | null | undefined): string {
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if (!iso) return ''
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const diff = Math.floor((Date.now() - new Date(iso).getTime()) / 1000)
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if (diff < 60) return '刚刚'
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if (diff < 3600) return `${Math.floor(diff / 60)} 分钟前`
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if (diff < 86400) return `${Math.floor(diff / 3600)} 小时前`
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if (diff < 2592000) return `${Math.floor(diff / 86400)} 天前`
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return iso.slice(0, 10)
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}
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