Question

如果我使用下面给出的new Getproduct().execute();来执行extension URL { func appendingNonEscapedQueryItems(_ queryItems: [URLQueryItem]) -> URL { let url = self var urlString = url.absoluteString for queryItem in queryItems { let queryName = queryItem.name guard let queryValue = queryItem.value else { continue } let query = queryName + "=" + queryValue if queryItem == queryItems.first { urlString = urlString + "?" + query } else { urlString = urlString + "&" + query } } return URL(string: urlString)! } } ... let requestURL = components.url!.appendingNonEscapedQueryItems(queryItems) print("URL \(requestURL)")，那么即使我指定了版本package.json，也会安装npm install（请参阅下面的react-15.4.2）。

这怎么可能？

为什么会这样？

我该如何避免这种情况？

npm ls的内容：

15.3.2

package.json给出：

{
  "name": "sbt-demo",
  "version": "0.1.0",
  "description": "Webpack configuration for sbt-demo",
  "license": "GPL-3.0",
  "scripts": {
    "build": "webpack --config webpack.config.prod.js",
    "dist": "webpack --config webpack.config.prod.js"
  },
  "devDependencies": {
    "compression-webpack-plugin": "^0.2.0",
    "css-loader": "^0.23.0",
    "file-loader": "^0.8.4",
    "ghooks": "^1.3.2",
    "gulp-decompress": "^1.1.0",
    "image-webpack-loader": "^1.6.1",
    "imagemin": "^4.0.0",
    "lodash": "^4.14.1",
    "node-libs-browser": "^0.5.2",
    "react-hot-loader": "^1.2.7",
    "style-loader": "^0.13.0",
    "url-loader": "^0.5.6",
    "webpack": "^1.9.10",
    "webpack-dev-server": "^1.9.0"
  },
  "dependencies": {
    "highlight.js": "8.9.1",
    "material-ui": "^0.15.2",
    "react": "^15.3.2",
    "react-addons-create-fragment": "15.3.2",
    "react-addons-css-transition-group": "15.3.2",
    "react-addons-pure-render-mixin": "15.3.2",
    "react-addons-transition-group": "15.3.2",
    "react-addons-update": "15.3.2",
    "react-dom": "^15.3.2",
    "react-geomicons": "^2.0.4",
    "react-grid-layout": "^0.13.9",
    "react-infinite": "^0.7.1",
    "react-select": "^1.0.0-beta",
    "react-sortable-hoc": "^0.2.0",
    "react-spinner": "^0.2.3",
    "react-tagsinput": "^3.0.3",
    "react-tap-event-plugin": "^1.0.0",
    "svg-loader": "0.0.2"
  }
}

Answer 1

因为你给了＆＃34;反应＆＃34;插入符号"react": "^15.3.2"它将始终获取小于16.0.0的最新版本。

要获得确切的反应版本，请在版本"react": "15.3.2"之前删除插入符。

但是，通过这样做，您必须手动检查/更改使用react的其他依赖项的版本依赖性。因为它们可能与您指定的反应版本不兼容。

有关官方文档，请参阅https://docs.npmjs.com/misc/semver#caret-ranges-123-025-004。

npm安装的版本与package.json中指定的版本不同，这怎么可能？怎么解决这个问题？

1 个答案: