71 lines
1.4 KiB
Markdown
71 lines
1.4 KiB
Markdown
---
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id: 5a24c314108439a4d403614e
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title: Define an Action Creator
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challengeType: 6
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isRequired: false
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forumTopicId: 301441
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localeTitle: 定义一个 Action Creator
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---
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## Description
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<section id='description'>
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创建 action 后要将 action 发送到 Redux store，以便它可以更新其状态。在 Redux 中，你可以定义动作创建器来完成此任务，action creator 只是一个返回动作的 JavaScript 函数，换句话说，action creator 创建表示动作事件的对象。
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</section>
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## Instructions
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<section id='instructions'>
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定义名为<code>actionCreator()</code>的函数，该函数在调用时返回<code>action</code>对象。
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: 函数<code>actionCreator</code>应该存在。
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testString: assert(typeof actionCreator === 'function');
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- text: 运行<code>actionCreator</code>函数应返回 action 对象。
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testString: assert(typeof action === 'object');
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- text: 返回的 action 应具有值为<code>LOGIN</code>的键值类型。
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testString: assert(action.type === 'LOGIN');
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='jsx-seed'>
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```jsx
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const action = {
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type: 'LOGIN'
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}
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// 在此处定义 action creator
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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const action = {
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type: 'LOGIN'
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}
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// 在此处定义 action creator:
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const actionCreator = () => {
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return action;
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};
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```
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</section>
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