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window.customElements.define('gitea-absolute-date', class extends HTMLElement {
static observedAttributes = ['date', 'year', 'month', 'weekday', 'day'];
update = () => {
const year = this.getAttribute('year') ?? '';
const month = this.getAttribute('month') ?? '';
const weekday = this.getAttribute('weekday') ?? '';
const day = this.getAttribute('day') ?? '';
const lang = this.closest('[lang]')?.getAttribute('lang') ||
this.ownerDocument.documentElement.getAttribute('lang') ||
'';
// only extract the `yyyy-mm-dd` part. When converting to Date, it will become midnight UTC and when rendered
// as localized date, will have a offset towards UTC, which we remove to shift the timestamp to midnight in the
// localized date. We should eventually use `Temporal.PlainDate` which will make the correction unnecessary.
// - https://stackoverflow.com/a/14569783/808699
// - https://tc39.es/proposal-temporal/docs/plaindate.html
const date = new Date(this.getAttribute('date').substring(0, 10));
const correctedDate = new Date(date.getTime() - date.getTimezoneOffset() * -60000);
if (!this.shadowRoot) this.attachShadow({mode: 'open'});
this.shadowRoot.textContent = correctedDate.toLocaleString(lang ?? [], {
...(year && {year}),
...(month && {month}),
...(weekday && {weekday}),
...(day && {day}),
});
};
attributeChangedCallback(_name, oldValue, newValue) {
if (!this.initialized || oldValue === newValue) return;
this.update();
}
connectedCallback() {
this.initialized = false;
this.update();
this.initialized = true;
}
});
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