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<!DOCTYPE html> <html> <body> <h1>Demo: instanceof operator</h1> <p id="p1">f1 instanceof func1 = </p> <p id="p2">f1 instanceof func2 = </p> <p id="p3">f1 instanceof Object = </p> <script> function func1(){ }; function func2(){ }; var f1 = new func1(); document.getElementById("p1").innerHTML += f1 instanceof func1; document.getElementById("p2").innerHTML += f1 instanceof func2; document.getElementById("p3").innerHTML += f1 instanceof Object; </script> </body> </html>
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