---
id: a77dbc43c33f39daa4429b4f
title: Boo who
isRequired: true
challengeType: 5
videoUrl: ''
localeTitle: 嘘谁
---
## Description
检查值是否归类为布尔基元。返回true或false。布尔基元是true和false。如果卡住，请记得使用Read-Search-Ask 。尝试配对程序。编写自己的代码。
## Instructions
## Tests
```yml
tests:
- text: booWho(true)应该返回true。
testString: 'assert.strictEqual(booWho(true), true, "booWho(true) should return true.");'
- text: booWho(false)应该返回true。
testString: 'assert.strictEqual(booWho(false), true, "booWho(false) should return true.");'
- text: 'booWho([1, 2, 3])应该返回false。'
testString: 'assert.strictEqual(booWho([1, 2, 3]), false, "booWho([1, 2, 3]) should return false.");'
- text: 'booWho([].slice)应该返回false。'
testString: 'assert.strictEqual(booWho([].slice), false, "booWho([].slice) should return false.");'
- text: 'booWho({ "a": 1 })应该返回false。'
testString: 'assert.strictEqual(booWho({ "a": 1 }), false, "booWho({ "a": 1 }) should return false.");'
- text: booWho(1)应该返回false。
testString: 'assert.strictEqual(booWho(1), false, "booWho(1) should return false.");'
- text: booWho(NaN)应该返回false。
testString: 'assert.strictEqual(booWho(NaN), false, "booWho(NaN) should return false.");'
- text: booWho("a")应该返回false。
testString: 'assert.strictEqual(booWho("a"), false, "booWho("a") should return false.");'
- text: booWho("true")应该返回false。
testString: 'assert.strictEqual(booWho("true"), false, "booWho("true") should return false.");'
- text: booWho("false")应该返回false。
testString: 'assert.strictEqual(booWho("false"), false, "booWho("false") should return false.");'
```
## Challenge Seed
```js
function booWho(bool) {
// What is the new fad diet for ghost developers? The Boolean.
return bool;
}
booWho(null);
```
## Solution
```js
// solution required
```