Marks the image for observation by the PerformanceElementTiming API. The value given becomes an identifier for the observed image Chemisches element. See also the elementtiming attribute page. Try it Yourself » If a browser cannot find an image, it will display the value of the alt attribute: The value of https://juliusxsdnx.theideasblog.com/29220400/untersuchen-sie-diesen-bericht-über-image