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JavaScript Object.defineProperty() 方法
tryjsref_object_defineproperty2
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<!DOCTYPE html> <html> <body> <h1>JavaSript Objects</h1> <h2>The defineProperty() Method</h2> <p id="demo"></p> <script> // Create an Object: const person = { firstName: "John", lastName : "Doe", language : "NO", }; // Change a Property: Object.defineProperty(person, "language", { value: "EN", writable : true, enumerable : false, configurable : true }); // Enumerate Properties let txt = ""; for (let x in person) { txt += person[x] + "<br>"; } document.getElementById("demo").innerHTML = txt; </script> </body> </html>