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Javascript New Window With Dynamic Content And Blank Url, Event Listeners Not Called

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Case 1: var printWindow = window.open('', 'print_window'); if(printWindow) { printWindow.addEventListener('load', function(){alert(1);}, false); //Everything works but this l

Solution 1:

You've some document context problems. Have a look up to documentation and dummy examples for window.open.

Also inspect below snippet and give attention that how alert function should be called from different window namespace. 

<!DOCTYPE html><html><head><title></title></head><body><buttonid="window_opener">Click me to load a new window</button><scripttype="text/javascript">document.getElementById("window_opener").addEventListener('click', function(){
    var badDocumentString = "<html><head><title>print window</title></head><body>I live in child window</body></html>";
    var child = window.open()
    childdoc = child.document
    childdoc.write(badDocumentString);
    childdoc.close();
    child.addEventListener("load", function(){
      child.alert("zeee germans"); //attention here
    });
  })
</script></body></html>

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