---
title: Vector cross product
id: 594810f028c0303b75339ad2
challengeType: 5
videoUrl: ''
localeTitle: 矢量交叉产品
---

## Description
<section id="description">矢量被定义为具有三个维度，由三个数字的有序集合表示：（X，Y，Z）。 <p>任务： </p><pre> <code>Write a function that takes two vectors (arrays) as input and computes their cross product.</code> </pre><p>您的函数应在无效输入（即不同长度的向量）上返回<code>null</code> 。 </p><p></p></section>

## Instructions
<section id="instructions">
</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: dotProduct必须是一个函数
    testString: 'assert.equal(typeof crossProduct, "function", "dotProduct must be a function");'
  - text: dotProduct（）必须返回null
    testString: 'assert.equal(crossProduct(), null, "dotProduct() must return null");'
  - text: 'crossProduct（[1,2,3]，[4,5,6]）必须返回[-3,6，-3]。'
    testString: 'assert.deepEqual(res12, exp12, "crossProduct([1, 2, 3], [4, 5, 6]) must return [-3, 6, -3].");'

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
function crossProduct() {
    // Good luck!
}

```

</div>


### After Test
<div id='js-teardown'>

```js
console.info('after the test');
```

</div>

</section>

## Solution
<section id='solution'>

```js
// solution required
```
</section>