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<html><body><h1>JavaScript Objects</h1><h2>The Object.isSealed() Method</h2><p id="demo"></p><script> // Create Object const person = { firstName: "John", lastName: "Doe" }; // Seal Object Object.seal(person); // This will return true let answer = Object.isSealed(person) document.getElementById("demo").innerHTML = answer;</script></body><!-- /js/tryit.asp?filename=tryjs_object_issealed Thu, 06 Feb 2025 19:15:31 GMT --></html>