2021-05-05 10:13:49 -07:00
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---
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id: 587d7fb5367417b2b2512c03
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title: 用脫字符(^)來使用依賴項的最新次要版本
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challengeType: 2
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forumTopicId: 301531
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dashedName: use-the-caret-character-to-use-the-latest-minor-version-of-a-dependency
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---
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# --description--
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和上一個挑戰中我們學到的用波浪號來安裝最新的修訂版依賴一樣,脫字符(`^`)也允許 npm 來安裝功能更新。 它們的不同之處在於:脫字符允許次版本和修訂版更新。
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現在項目中的 moment 依賴包的版本應該是“~2.10.2”,這意味着 npm 可以安裝最新的 2.10.x 版的 moment, 如果使用脫字符(^)來替換版本號的前綴,那麼 npm 可以將 moment 升級安裝到任何 2.x.x 的版本。
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```json
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"package": "^1.3.8"
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```
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這會將依賴包更新到任意的 1.x.x 版本。
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# --instructions--
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在依賴項中,使用脫字符(`^`)爲 moment 的版本添加前綴,允許 npm 更新依賴包到任意新的次版本。
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2021-09-18 11:22:53 -07:00
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**注意:** 原來的版本號不用更改。
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2021-05-05 10:13:49 -07:00
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# --hints--
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“dependencies”字段中應包含“moment”
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```js
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(getUserInput) =>
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$.get(getUserInput('url') + '/_api/package.json').then(
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(data) => {
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var packJson = JSON.parse(data);
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assert.property(
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packJson.dependencies,
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'moment',
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'"dependencies" does not include "moment"'
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);
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},
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(xhr) => {
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throw new Error(xhr.responseText);
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}
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);
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```
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“moment”的版本應是“^2.x.x”
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```js
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(getUserInput) =>
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$.get(getUserInput('url') + '/_api/package.json').then(
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(data) => {
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var packJson = JSON.parse(data);
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assert.match(
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packJson.dependencies.moment,
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/^\^2\./,
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'Wrong version of "moment". It should be ^2.10.2'
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);
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},
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(xhr) => {
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throw new Error(xhr.responseText);
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}
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);
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```
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# --solutions--
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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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