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@ -1166,7 +1166,7 @@ let runtimeError = {
}; };
``` ```
如果扩展运算符的参数是`null`或`undefined`，这个两个值会被忽略，不会报错。 如果扩展运算符的参数是`null`或`undefined`，这两个值会被忽略，不会报错。
```javascript ```javascript
let emptyObject = { ...null, ...undefined }; // 不报错 let emptyObject = { ...null, ...undefined }; // 不报错