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---
id: aaa48de84e1ecc7c742e1124
title: Palindrome Checker
isRequired: true
challengeType: 5
videoUrl: ''
localeTitle: 回文检查
---
## Description
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< section id = "description" > 如果给定的字符串是回文，则返回< code > true</ code > 。否则，返回< code > false</ code > 。 < dfn > 回文</ dfn > 是一个单词或句子，其拼写方式与前后相同，忽略标点符号，大小写和间距。 < strong > 注意</ strong > < br > 您需要删除< strong > 所有非字母数字字符</ strong > （标点符号，空格和符号）并将所有内容转换为相同的大小写（小写或大写）以检查回文。我们会通过字符串具有不同的格式，如< code > " racecar" </ code > ， < code > " RaceCar" </ code > 和< code > " race CAR" </ code > 等等。我们还将传递带有特殊符号的字符串，例如< code > " 2A3*3a2" </ code > ， < code > " 2A3 3a2" </ code > 和< code > " 2_A3*3#A2 " </ code > 。如果卡住，请记得使用< a href = "https://www.freecodecamp.org/forum/t/how-to-get-help-when-you-are-stuck-coding/19514" target = "_blank" > Read-Search-Ask</ a > 。编写自己的代码。 </ section >
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## Instructions
< section id = "instructions" >
< / section >
## Tests
< section id = 'tests' >
```yml
tests:
- text: < code > palindrome(" eye" )</ code > 应该返回一个布尔值。
testString: 'assert(typeof palindrome("eye") === "boolean", "< code > palindrome("eye")< / code > should return a boolean.");'
- text: < code > palindrome(" eye" )</ code > 应该返回true。
testString: 'assert(palindrome("eye") === true, "< code > palindrome("eye")< / code > should return true.");'
- text: < code > palindrome(" _eye" )</ code > 应该返回true。
testString: 'assert(palindrome("_eye") === true, "< code > palindrome("_eye")< / code > should return true.");'
- text: < code > palindrome(" race car" )</ code > 应该返回true。
testString: 'assert(palindrome("race car") === true, "< code > palindrome("race car")< / code > should return true.");'
- text: < code > palindrome(" not a palindrome" )</ code > 应该返回false。
testString: 'assert(palindrome("not a palindrome") === false, "< code > palindrome("not a palindrome")< / code > should return false.");'
- text: '< code > palindrome(" A man, a plan, a canal. Panama" )</ code > 应该回归真实。'
testString: 'assert(palindrome("A man, a plan, a canal. Panama") === true, "< code > palindrome("A man, a plan, a canal. Panama")< / code > should return true.");'
- text: < code > palindrome(" never odd or even" )</ code > 应该返回true。
testString: 'assert(palindrome("never odd or even") === true, "< code > palindrome("never odd or even")< / code > should return true.");'
- text: < code > palindrome(" nope" )</ code > 应该返回false。
testString: 'assert(palindrome("nope") === false, "< code > palindrome("nope")< / code > should return false.");'
- text: < code > palindrome(" almostomla" )</ code > 应该返回false。
testString: 'assert(palindrome("almostomla") === false, "< code > palindrome("almostomla")< / code > should return false.");'
- text: '< code > palindrome(" My age is 0, 0 si ega ym." )</ code > 应该返回true。'
testString: 'assert(palindrome("My age is 0, 0 si ega ym.") === true, "< code > palindrome("My age is 0, 0 si ega ym.")< / code > should return true.");'
- text: < code > palindrome(" 1 eye for of 1 eye." )</ code > 应该返回假。
testString: 'assert(palindrome("1 eye for of 1 eye.") === false, "< code > palindrome("1 eye for of 1 eye.")< / code > should return false.");'
- text: '< code > palindrome(" 0_0 (: /-\ :) 0-0" )</ code > 应该返回true。'
testString: 'assert(palindrome("0_0 (: /-\ :) 0-0") === true, "< code > palindrome("0_0 (: /-\ :) 0-0")</ code > should return true.");'
- text: < code > palindrome(" five|\_/|four" )</ code > 应该返回false。
testString: 'assert(palindrome("five|\_/|four") === false, "< code > palindrome("five|\_/|four")</ code > should return false.");'
```
< / section >
## Challenge Seed
< section id = 'challengeSeed' >
< div id = 'js-seed' >
```js
function palindrome(str) {
// Good luck!
return true;
}
palindrome("eye");
```
< / div >
< / section >
## Solution
< section id = 'solution' >
```js
// solution required
```
< / section >
