Follow along with the video below to see how to install our site as a web app on your home screen.
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var element = document.getElementById("myImage");
var style = window.getComputedStyle(element);
if (style.display === "none" || style.visibility === "hidden")
{
alert("Das Bild ist unsichtbar!");
}
var element = document.getElementById("myImage");
if (element.naturalWidth !== "undefined" && element.naturalWidth === 0)
{
alert("Das Bild wurde nicht korrekt geladen!");
}