Marks the image for observation by the PerformanceElementTiming API. The value given becomes an identifier for the observed image element. Weiher also the elementtiming attribute page. Try it Yourself » If a browser cannot find an image, it will display the value of the altbier attribute: By contrast, when you https://lorenzooajue.blogolenta.com/25655195/eine-unvoreingenommene-sicht-auf-image