HTMLGeolocationElement: initialPermissionStatus property

Value

An enumerated value, which can be one of:

granted

The user previously granted permission for the browser to use the geolocation feature, either via the <geolocation> element or some other mechanism. When using the <geolocation> element, this means that the user previously pressed the rendered button and selected an "allow" option.

If the <geolocation> element has its autolocate attribute set to true, and permission was previously granted, the browser will start to request location data as soon as the page loads, without requiring the user to press the button.

denied

The user previously denied permission for the browser to use the geolocation feature, either via the <geolocation> element or some other mechanism. When using the <geolocation> element, this means that the user previously pressed the rendered button and selected a "don't allow" option.

prompt

The user has not previously granted or denied permission for the browser to use the geolocation feature. When using the <geolocation> element, this means that the user has not previously pressed the rendered button.

Examples

Basic usage

<geolocation></geolocation>

const geo = document.querySelector("geolocation");
console.log(geo.initialPermissionStatus);
// "granted" if the user previously granted permission before reloading the page

Using initial permission status to inform the user on page load

In this example, we use initial permission status to print an appropriate message to the screen informing the user what action the <geolocation> button will perform.

HTML

We include a <geolocation> element and two <p> elements, one to output permission status messages to, and one to output location data to.

<geolocation>
  Your browser doesn't support the <code>&lt;geolocation&gt;</code> element.
</geolocation>
<p id="status"></p>
<p id="output"></p>

JavaScript

In our JavaScript, we start by grabbing references to all three of our HTML elements:

const statusElem = document.querySelector("#status");
const outputElem = document.querySelector("#output");
const geo = document.querySelector("geolocation");

Next, we include an if...else if structure that checks what the initialPermissionStatus is, and prints a status message to the screen to inform the user what the status is, what they need to do to use the app, and what the button will do when pressed.

if (geo.initialPermissionStatus === "prompt") {
  statusElem.textContent =
    "Please press the button to allow access to your location data and start requesting it.";
} else if (geo.initialPermissionStatus === "denied") {
  statusElem.textContent =
    "Permission previously denied. Please press the button to allow access to your location data and start requesting it.";
} else if (geo.initialPermissionStatus === "granted") {
  statusElem.textContent =
    "Permission previously granted. Please press the button to start requesting location data.";
}

Finally, we we add a location event listener to the HTMLGeolocationElement object, to detect when the location data request is returned. If the data is returned successfully, we access it via the HTMLGeolocationElement.position property, and print the latitude and longitude values to the output paragraph. If the data request fails, we access the error via the HTMLGeolocationElement.error property and print it to the output paragraph.

geo.addEventListener("location", () => {
  statusElem.textContent = "Data requested";
  if (geo.position) {
    outputElem.textContent += `(${geo.position.coords.latitude},${geo.position.coords.longitude}), `;
  } else if (geo.error) {
    outputElem.textContent += `${geo.error.message}, `;
  }
});

Result

See the example running live (source code). Try selecting the <geolocation> button multiple times, choosing a different option from the resulting dialog each time and reloading the page, to see how the output message changes to reflect the situation.

Specifications

Browser compatibility

See also

• <geolocation> element