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<!DOCTYPE html> <html> <body> <h1>The Document Object</h1> <h2>The strictErrorChecking Property</h2> <p>The strictErrorChecking for this document is:</p> <p id="demo"></p> <p>The strictErrorChecking property is deprecated. It returns <b>undefined</b> in all new browsers.</p> <script> document.getElementById("demo").innerHTML = document.strictErrorChecking; </script> </body> </html>
