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HTMLTimeElement: dateTime property - Web APIs | MDN
HTMLTimeElement: dateTime property Baseline Widely available
The
dateTime
property of the HTMLTimeElement
interface is a string that reflects the datetime
HTML attribute, containing a machine-readable form of the element's date and
time value.
// Assumes there is <time id="t"> element in the HTML
const t = document.getElementById("t");
t.dateTime = "6w 5h 34m 5s";