Deprecated js库

我们在install一些库的时候， 可能会看到一些提示， 表明这个js库已经废弃了， 让大家去用xx库的。

0524$ npm i jQuery 
npm WARN deprecated jQuery@1.7.4: This is deprecated. Please use 'jquery' (all lowercase).
npm WARN saveError ENOENT: no such file or directory, open '/Volumes/Code/test/0524/package.json'
npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN enoent ENOENT: no such file or directory, open '/Volumes/Code/test/0524/package.json'
npm WARN 0524 No description
npm WARN 0524 No repository field.
npm WARN 0524 No README data
npm WARN 0524 No license field.

+ jQuery@1.7.4
added 1 package from 1 contributor in 0.298s

---

其实很简单， 发布前在package.json中添加一个字段 deprecated，就可以了

// package.json

{
    ...
    "deprecated": "This is deprecated. Please use 'jquery' (all lowercase)."
}

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