58 lines
2.0 KiB
Markdown
58 lines
2.0 KiB
Markdown
---
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id: 587d7fb5367417b2b2512c03
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challengeType: 2
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forumTopicId: 301531
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title: 用插入字符可以使用依赖项的最新次要版本
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---
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## Description
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<section id='description'>
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和上一个挑战中我们学到的波浪符号（~）来安装最新的修订版依赖一样，使用插入符号（^）允许 npm 来安装功能更新。它们的不同之处在于：插入符号（^）允许次版本和修订版更新。
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此刻，你项目中的 moment 依赖包的版本应该是 ~2.10.2，这意味着 npm 可以安装 2.10.x 版的 moment，如果使用插入符号（^）来替换版本号的前缀，那么 npm 可以安装的版本则是 2.x.x。
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```json
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"package": "^1.3.8"
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```
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这会更新 package 到任意的 1.x.x 版本。
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</section>
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## Instructions
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<section id='instructions'>
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使用插入符号（^）为依赖项中的 moment 版本添加前缀，允许 npm 更新依赖包到任意向下兼容的新功能版。
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请注意，原本的版本号不用更改。
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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: "'dependencies' 应包含 'moment'。"
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testString: 'getUserInput => $.get(getUserInput(''url'') + ''/_api/package.json'').then(data => { var packJson = JSON.parse(data); assert.property(packJson.dependencies, ''moment'', ''"dependencies" does not include "moment"''); }, xhr => { throw new Error(xhr.responseText); })'
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- text: "'moment' 的版本应匹配 '^2.x.x'。"
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testString: 'getUserInput => $.get(getUserInput(''url'') + ''/_api/package.json'').then(data => { var packJson = JSON.parse(data); assert.match(packJson.dependencies.moment, /^\^2\./, ''Wrong version of "moment". It should be ^2.10.2''); }, xhr => { throw new Error(xhr.responseText); })'
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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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</section>
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## Solution
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<section id='solution'>
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```js
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/**
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Backend challenges don't need solutions,
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because they would need to be tested against a full working project.
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Please check our contributing guidelines to learn more.
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*/
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```
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</section>
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