78 lines
1.9 KiB
Markdown
78 lines
1.9 KiB
Markdown
---
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id: 587d7fb4367417b2b2512c00
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title: 使用 npm 的外部包擴展項目
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challengeType: 2
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forumTopicId: 301527
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dashedName: expand-your-project-with-external-packages-from-npm
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---
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# --description--
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強大的依賴管理特性是使用包管理器的最大原因之一。 每當在新的計算機上開始一個項目時，無需手動，npm 會自動安裝所有的依賴項。 但是 npm 如何準確地知道項目需要哪些依賴呢？ 來看看 package.json 文件中 `dependencies` 這一部分。
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在這部分，你的項目需要按照下面這種格式來存儲依賴包：
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```json
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"dependencies": {
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"package-name": "version",
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"express": "4.14.0"
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}
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```
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# --instructions--
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在 package.json 文件的 `dependencies` 字段中添加一個版本號爲“2.14.0”的“moment”包。
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**注意：** Moment 是一個非常方便地用來處理時間和日期的庫。
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# --hints--
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“dependencies”字段應該包含“moment”
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```js
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(getUserInput) =>
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$.get(getUserInput('url') + '/_api/package.json').then(
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(data) => {
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var packJson = JSON.parse(data);
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assert.property(
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packJson.dependencies,
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'moment',
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'"dependencies" does not include "moment"'
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);
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},
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(xhr) => {
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throw new Error(xhr.responseText);
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}
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);
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```
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“moment”的版本應該是“2.14.0”
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```js
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(getUserInput) =>
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$.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\.14\.0/,
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'Wrong version of "moment" installed. It should be 2.14.0'
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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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