Marks the image for observation by the PerformanceElementTiming API. The value given becomes an identifier for the observed image element. Tümpel also the elementtiming attribute page. Try it Yourself » If a browser cannot find an image, it will display the value of the alt attribute: Microsoft and DuckDuckGo have https://image92570.theobloggers.com/34859709/immer-meine-image-um-zu-arbeiten