ES6導入/導出無法使用變量？ 流星

Question

為什么這項工作

export var Tasks = new Mongo.Collection('tasks');

但這不是嗎？

var Tasks = new Mongo.Collection('tasks');
export Tasks

Answer 1

因為這不是導出變量的標准方法。 檢查文檔 ：

export { name1, name2, …, nameN };
export { variable1 as name1, variable2 as name2, …, nameN };
export let name1, name2, …, nameN; // also var
export let name1 = …, name2 = …, …, nameN; // also var, const

export default expression;
export default function (…) { … } // also class, function*
export default function name1(…) { … } // also class, function*
export { name1 as default, … };

export * from …;
export { name1, name2, …, nameN } from …;
export { import1 as name1, import2 as name2, …, nameN } from …;

所以你可以做的是

export { Tasks };

Answer 2

嘗試以下語法：

var Tasks = new Mongo.Collection('tasks');
export { Tasks }

我也建議使用camelCase作為變量名。

Answer 3

使用export const Tasks = new Meteor.Collection('tasks');的最佳實踐export const Tasks = new Meteor.Collection('tasks');