无法添加属性“X"，对象不可扩展 angular 9 [英] Cannot add property "X", object is not extensible angular 9

问题描述

从 Angular 8 更新到 Angular 9 几天后，我在很多地方都遇到了这个问题.早些时候它运行良好.

I have encountered this issue on many places after some days of updating from Angular 8 to Angular 9. Earlier it was working fine.

谁能帮我看看有什么问题.下面的示例代码

Can anyone help me what's the problem. Example code below

list.reduce((acc, curr) => {
        const obj = {};
        obj['x'] = curr['Y'];
});

推荐答案

我在这里参考 Ngrx 版本 8 到 9 的更改列表和迁移指南

I refer change list of Ngrx version 8 to 9 and migration guideline here

https://ngrx.io/guide/migration/v9

我发现有一个与 angular 9 的不变性相关的特殊变化.他们在那里定义了动作、状态和可序列化相关的不变性逻辑.我在这里尝试了他们建议的解决 Ngrx V9 更新问题的方法

As I found there is a special change related to immutability with angular 9. They have defined Action, state and serializability related immutability logic there. And I tried out the method that they have suggested to resolve those issues with Ngrx V9 update here

https://ngrx.io/guide/store/configuration/runtime-checks

@ngrx/store 附带五 (5) 个内置运行时检查.尝试禁用所有检查

@ngrx/store ships with five (5) built-in runtime checks. Try disabled all checks

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