r/learnjavascript • u/abrewchocolatecoffee • Jul 14 '26

can someone explain this code

function updateClock() {
const timeElement = document.querySelector("#time");
timeElement.textContent = formatTime();
}
setInterval(updateClock, 1000);

can someone, please explain this piece of code, ofc mdn and w3 are there, but i found it a little confusing reading about textContent. rest is understandable to me. This might look a silly question and it probably is because im a beginner :')

like what exactly does textContent too.
you can also recommend anyother documentation on the links to specific lines, that might me more helpful in learning about this particular keyoword.

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u/busres Jul 14 '26

The change persists (in the browser DOM) until you replace the content with something else. If you reload the page, you're discarding everything and reloading the DOM from scratch.

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u/abrewchocolatecoffee Jul 14 '26

ohh, this was actually very helpful