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对象以键/值对的形式编写。键/值对称为属性。例如，
const student = {
name: 'John',
age: 22
}在这里，name: 'John' 和 age: 22 是 student 对象的两个属性。
示例：从对象中移除属性
// program to remove a property from an object
// creating an object
const student = {
name: 'John',
age: 20,
hobbies: ['reading', 'games', 'coding'],
greet: function() {
console.log('Hello everyone.');
},
score: {
maths: 90,
science: 80
}
};
// deleting a property from an object
delete student.greet;
delete student['score'];
console.log(student);输出
{
age: 20,
hobbies: ["reading", "games", "coding"],
name: "John"
}
在上面的程序中，delete 运算符用于从对象中移除属性。
您可以使用 . 或 [ ] 结合 delete 运算符从对象中移除属性。
注意：不应将 delete 运算符用于预定义的 JavaScript 对象属性。
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