files/en-us/web/api/htmlgeolocationelement/isvalid/index.md
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The isValid read-only property of the {{domxref("HTMLGeolocationElement")}} interface returns a boolean value indicating whether the associated {{htmlelement("geolocation")}} element is valid or invalid (blocked).
When a blocker is active on a <geolocation> element, it is prevented from functioning (invalid), either temporarily or permanently, depending on the reason.
You can return the reason why it is invalid via the {{domxref("HTMLGeolocationElement.invalidReason")}} property — see that page for a full list of possible reasons.
A boolean value:
true, the <geolocation> element is valid and functional, meaning that it can be used to request location data.false, the <geolocation> element is invalid and non-functional, meaning that it can't be used to request location data.Defaults to false.
<geolocation></geolocation>
const geo = document.querySelector("geolocation");
console.log(geo.isValid);
// true, provided the `<geolocation>` element is not blocked in some way
See the {{domxref("HTMLGeolocationElement.invalidReason")}} page for a more complete example involving isValid.
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