Object.freeze()方法将冻结对象，以防止向其添加新属性。此方法防止修改现有属性，属性和值。
Object.freeze - 语法
Object.freeze(obj)
Object.freeze - 参数
obj:要冻结的对象。
Object.freeze - 返回值
此方法返回传递给函数的对象。
浏览器支持
| Chrome | 45.0 |
| Edge | 12.0 |
| Firefox | 32.0 |
| Opera | no |
例子1
const object1 = { property1: 22 }; const object2 = Object.freeze(object1); object2.property1 = 33; // Throws an error in strict mode console.log(object2.property1);
输出:
22
例子2
const obj1 = { property1: freeze}; const obj2 = Object.freeze(obj1); obj2.property1 = new_data; console.log(obj2.property1);
输出:
" freeze "
例子3
var obj = { prop: function() {}, name: charry }; console.log(obj); obj.name = karri; delete obj.prop; console.log(obj); var o = Object.freeze(obj); obj.name = chris; console.log(obj);
输出:
[object Object] {
name: "charry",
prop: function() {}
}
[object Object] {
name: "karri"
}
[object Object] {
name: "karri"
}
