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<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>