Property or method "Reflect" is not defined on the instance
时间: 2023-09-29 15:05:43 浏览: 84
The error message you mentioned usually occurs when you are trying to use the `Reflect` object in JavaScript, but it is not defined or accessible in the current context.
The `Reflect` object is a built-in object in JavaScript that provides methods for interceptable JavaScript operations. It includes static methods that can be used to perform meta-programming tasks, like creating proxies, defining property descriptors, etc.
To resolve the error, you need to ensure that your environment supports the ECMAScript 2015 (ES6) standard, as that's when the `Reflect` object was introduced. If you are using an older version of JavaScript, you may need to update your environment or use a transpiler like Babel to convert your code to a compatible version.
If you are already using ES6 or a compatible environment, make sure that you have imported or accessed the `Reflect` object correctly. You can import it using the following statement:
```javascript
import Reflect from 'core-js/es/reflect';
```
Or, if you are running the code in a browser environment, ensure that it supports the `Reflect` object natively.