GeolocationPosition：coords 屬性
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2020年7月.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
GeolocationPosition 介面的 coords 唯讀屬性會回傳一個代表地理位置的 GeolocationCoordinates 物件。該物件包含了位置（即地球上的經度與緯度）、高度以及相關物件的速度，並重新分組於回傳值之中。它也包含了關於這些數值的準確度訊息。