我有以下 2 个组件:
BasicMaintainer
// etc...
import GeneratingUnit from "./generating-unit";
class BasicMaintainer extends Component {
constructor(props) {
super(props);
// etc...
}
// etc...
handleOnSelectFile = event => {
here I want to use: GeneratingUnit.columns.length
}
GeneratingUnit
的另一个组件是:
import React from 'react';
//...code
export const columns = [
{name: 'ID', numeric: false, disablePadding: true, key: 'id'},
{name: 'NOMBRE', numeric: false, disablePadding: true, key: 'nombre'},
{name: 'DESCRIPCIÓN', numeric: false, disablePadding: true, key: 'descripcion'},
{name: 'IT UNIDAD GENERADORA', numeric: false, disablePadding: true, key: 'it_unidad_generadora'},
]
const GeneratingUnit = props => <div>
//code...
</div>
export default GeneratingUnit;
如何在handleOnSelectFile
组件中使用const columns
BasicMaintainer
?
将其导入到BasicMaintainer
文件中:
import GeneratingUnit, {columns} from "./generating-unit";
如果不修改此变量: 从组件中删除columns
变量,并将当前模块放入包含全局变量和函数的共享文件夹中,然后导入组件。
folder: shared
file: index.js
索引.js
export const columns = [
{name: 'ID', numeric: false, disablePadding: true, key: 'id'},
{name: 'NOMBRE', numeric: false, disablePadding: true, key: 'nombre'},
{name: 'DESCRIPCIÓN', numeric: false, disablePadding: true, key: 'descripcion'},
{name: 'IT UNIDAD GENERADORA', numeric: false, disablePadding: true, key: 'it_unidad_generadora'},
]
在组件中:
import { columns } from "./shared";