我尝试从 react native 中的另一个 js 文件导入 JS 文件中的数组数据，并尝试检查 react native 中的数组长度

Question

TypeError: undefined is not an object (evaluating '_kurals.default.length') i got this error.

export const kurals =[];
import kurals from './kurals';
 console.log(`data1.length`, kurals.length);

Answer 1

If you want to import it as a default, like you did with import kurals from './kurals'; , then it must be exported as default:

export default [];

Since you exported it with export const kurals = [];then it's a property of the exported object and you need to destructure it:

import { kurals } from './kurals';