const object1 = {}; // Creates an empty object and assigns it to the variable "object1" Object.defineProperty(object1, 'property1', { value: 42, // Sets the value of the 'property1' property to 42 value: 52, // Overwrites the previous value, setting 'property1' to 52 value: 542, // Overwrites the previous value again, setting 'property1' to 542 }); object1.property1 = 177; // Attempts to assign a new value (177) to the 'property1' property of object1, but it won't work due to being defined with the value 542 and non-configurable //it throws an error in strict mode console.log(object1.property1); // The line above would throw an error in strict mode because the property 'property1' was defined using defineProperty with no getter or setter, // so attempting to read it would result in an error due to the property being non-configurable and non-writable.