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---
id: 587d7db4367417b2b2512b90
title: 同时用多种模式匹配文字字符串
challengeType: 1
forumTopicId: 301345
dashedName: match-a-literal-string-with-different-possibilities
---
# --description--
使用正则表达式`/coding/`,你可以在其他字符串中查找`"coding"`
这对于搜寻单个字符串非常有用,但仅限于一种匹配模式。你可以使用`|`操作符来匹配多个规则。
此操作符匹配操作符前面或后面的字符。例如,如果你想匹配`"yes"``"no"`,你需要的正则表达式是`/yes|no/`
你还可以匹配多个规则,这可以通过添加更多的匹配模式来实现。这些匹配模式将包含更多的`|`操作符来分隔它们,比如`/yes|no|maybe/`
# --instructions--
完成正则表达式`petRegex`以匹配`"dog"``"cat"``"bird"`或者`"fish"`
# --hints--
对于字符串`'John has a pet dog.'`,你的正则表达式`petRegex``test`方法应该返回`true`
```js
assert(petRegex.test('John has a pet dog.'));
```
对于字符串`'Emma has a pet rock.'`,你的正则表达式`petRegex``test`方法应该返回`false`
```js
assert(!petRegex.test('Emma has a pet rock.'));
```
对于字符串`'Emma has a pet bird.'`,你的正则表达式`petRegex``test`方法应该返回`true`
```js
assert(petRegex.test('Emma has a pet bird.'));
```
对于字符串`'Liz has a pet cat.'`,你的正则表达式`petRegex``test`方法应该返回`true`
```js
assert(petRegex.test('Liz has a pet cat.'));
```
对于字符串`'Kara has a pet dolphin.'`,你的正则表达式`petRegex``test`方法应该返回`false`
```js
assert(!petRegex.test('Kara has a pet dolphin.'));
```
对于字符串`'Alice has a pet fish.'`,你的正则表达式`petRegex``test`方法应该返回`true`
```js
assert(petRegex.test('Alice has a pet fish.'));
```
对于字符串`'Jimmy has a pet computer.'`,你的正则表达式`petRegex``test`方法应该返回`false`
```js
assert(!petRegex.test('Jimmy has a pet computer.'));
```
# --seed--
## --seed-contents--
```js
let petString = "James has a pet cat.";
let petRegex = /change/; // Change this line
let result = petRegex.test(petString);
```
# --solutions--
```js
let petString = "James has a pet cat.";
let petRegex = /dog|cat|bird|fish/; // Change this line
let result = petRegex.test(petString);
```