Geolocation Viewer

the Geolocation Viewer Tool, specifically for requesting and displaying the user's geographical location. Here's a breakdown of what the selected code does: Element References: At the beginning, it retrieves references to various HTML elements by their IDs. These elements are where the latitude, longitude, accuracy, timestamp, and any error messages will be displayed, as well as the "Get My Location" button. Event Listener for the Button: The getLocationButton.addEventListener('click', ...) block sets up an event listener. This means that whenever the "Get My Location" button is clicked, the code inside this function will execute. Initial Display Update: When the button is clicked, it first clears any previous error messages and sets the text content of the output fields (latitude, longitude, accuracy, timestamp) to "Fetching..." to indicate that the location data is being retrieved. Geolocation API Check: It then checks if the navigator.geolocation object is available in the user's browser. This object is part of the Geolocation API and indicates whether the browser supports location services. getCurrentPosition() Call: If geolocation is supported, navigator.geolocation.getCurrentPosition() is called. This function attempts to get the device's current location. It takes three arguments: Success Callback: A function that runs if the location is successfully obtained. Inside this function, position.coords.latitude, position.coords.longitude, position.coords.accuracy, and position.timestamp are used to update the respective output fields in the UI. The latitude and longitude are formatted to 6 decimal places, accuracy to 2 decimal places, and the timestamp is converted to a human-readable local string. Error Callback: A function that runs if there's an error getting the location (e.g., user denies permission, location is unavailable). It uses a switch statement to determine the type of error (PERMISSION_DENIED, POSITION_UNAVAILABLE, TIMEOUT, UNKNOWN_ERROR) and displays a user-friendly error message in the errorMessage element. It also sets all location output fields to "N/A". Options Object: An optional object that provides configuration for the location request: enableHighAccuracy: true: Requests the most accurate location possible, which might use GPS if available. timeout: 5000: Sets a maximum time (5000 milliseconds or 5 seconds) to wait for a location. If a location isn't obtained within this time, the error callback with a TIMEOUT code is triggered. maximumAge: 0: Specifies that a cached position older than 0 milliseconds should not be used, forcing the browser to attempt to retrieve a fresh location. Geolocation Not Supported: If navigator.geolocation is not found (meaning the browser doesn't support the Geolocation API), it immediately displays an error message indicating this and sets all output fields to "Not supported".

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Created: May 21, 2025
By: kdjcody

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