如何告诉节点使用特定的已安装软件包版本？

Question

如果我的系统上安装了foo软件包的1.1和1.2版本，并且bar.js需要foo软件包，是否有一种方法可以调用node bar.js以便该节点使用foo的1.1版本？

Answer 1

NPM packages that are local to the project stay in node_modules and don't update unless you explicitly update them yourself. You can use NPM's semantic versioning to manage the granularity of your dependencies on a per-project basis. Here's a semver cheat sheet: https://semver.npmjs.com/

With that in mind, where this breaks down is if you're installing modules globally (which you should not be doing unless the package owner tells you to, eg Grunt or Angular-CLI). If you are using global modules and you don't need to be, you should fix that ;)

If you find that semantic versioning is causing conflicts for dependencies within your project (eg foo requires bar 1.0 and faa requires bar 1.1) OR you are concerned about the risk of breaking dependency changes, take a look at Yarn .