How to modify node_modules

 Why modify node_modules?

In normal development, it is rarely necessary to change the code in node_modules, but there are many cases that need to be modified.

For example, I encountered a scene last time, I used a middleware package for interface forwarding, but I encountered a problem: this package limits the uploaded file format

But in fact, I want to let go of uploading all file formats, so I am forced to modify the code of this package in node_modules and let go of its restrictions, so as to achieve the effect I want, so how should I change it? This is a problem


The first method: direct change

This is easy to understand, just go directly to node_modules, find the code of that package, modify the code in the corresponding place, and then restart the project to achieve the effect I want.

But in fact, this approach has too many disadvantages!


1. You can only use the code you modified locally, and your colleagues cannot use it

2. After the next npm i, the code of the package will be restored to its original state

So no one should do it? ? ?


The second: maintain a package independently

I use a package A, which restricts the format of the uploaded file, but I don't want to, I want to let go of the restriction, so how can I do it?


I can do this, I write a new package B, this new package B is actually a copy of package A, and after copying, I release the format restrictions in package B, and then push package B to npm

At this time, I don't need to use package A in my project, I just need to install package B that I maintain myself. This can actually achieve the effect, but it will increase the cost of maintenance. . .


The third type: patch-package

This is a tool specially used to modify the code of the package in node_modules, and it is very simple to use.

1. npm i patch-package


2.Modify node_modules

For example, if I want to modify package A, then I directly modify it in node_modules, and then execute

npx patch-package A

At this time, the patches directory will appear in the root directory of your project, and a patch file for package A will appear in it. 


Note: Remember to submit the patches directory to git or svn

In fact, at this time, you have already used your modified code locally, but the question is how to let your colleagues also synchronize to your modified code


3、"postinstall": "patch-package"

Add in the script of package.json

"postinstall":"patch-package"

The function of this command is: when your colleague executes npm i, it will automatically execute the npm run postinstall command, that is, execute patch-package. At this time, go back and read the patches directory just now, and match those patches to the corresponding in the bag.


For example, I just modified package A and submitted the patch file. Then when my colleague npm i, it will automatically execute the npm run postinstall command, then go to the pacthes directory to find the patch file of the corresponding package A, and put the patch into the package A of node_modules to achieve the effect of modifying the code synchronously! !

Popular posts from this blog

大学资料分享——广工计院各个科目实验报告、课设及期末复习资料！！

各位师弟师妹，我今年即将从广工毕业，因工作毕设都已差不多完成，整理资料时最终还是决定分享自己大学期间积累的各科资料。本人是广工计院一名本科生，在校绩点四年综合4.0左右，我相信这些资料对你们的学习和实验有非常大的实用性和价值。也真心希望大家能做好时间效率管理，一些不必要的课程不用浪费很多时间，把时间多留给自己所走的方向，希望各位师弟师妹好好利用我的资料，提升自己。如果本篇文章对你有帮助，请多来网站阅览并点击下页面的谷歌广告支持一下，十分感谢~~ 本博客除资源分享外还会 定期发布前端相关的行业动态、前端面试题系列等，后续也会逐步将自己的秋招总结发到谷歌博客上，同方向的师弟师妹们可以关注下，毕竟我也是在最寒冬秋招中获得好几个知名厂offer的，相信对你们将来的工作和面试也会非常实用 。 University special design: Specialised design IPV6 Experiment Report: GDUT IPV6 GDUT matlab digital signal processing experiment report: Matlab Experiment Report The latest operating system experiment and course design report: OS Experiment Report Virtualization and Cloud Computing-Hadoop Deployment Experiment Report: Hadoop Report GDUT C language programming experiment report 1-4: C language programming experiment report Summary of Physics Data of GDUT ： Physics GDUT DEA experiment + big assessment (source code, waveform diagram) + test paper information： EDA Data summary of GDUT Electrician： University Ele...
Read more

JAVA Traffic Signal Light Course Design (Source Code + Report + Video Demonstration)

Image
Table Of Contents topic details Simulate the logic of the traffic light management system at the intersection. 1. Randomly generate vehicles traveling along each route 2. Signal lights ignore yellow lights and only consider red and green lights. 3. It should be considered that vehicles turning left are controlled by signal lights, and vehicles turning right are not controlled by signal lights. 4. The specific signal light control logic is the same as that of ordinary traffic light control logic in real life, regardless of the control logic in special cases: North-south vehicles and east-west vehicles are released alternately. Vehicles waiting in the same direction should pass through vehicles first, and then vehicles turning left. 5. The time for each vehicle to pass through the intersection is 1 second (reminder: it can be simulated by thread sleep). 6. The time interval for randomly generating vehicles and the time interval for exchanging traffic lights i...
Read more

Win10 远程计算机或设备将不接受连接

Image
Table Of Contents 错误详情 当晚如平常一样开着clash，但谷歌浏览器显示此网站无法提供安全连接，按网上说的方法改https为http、清除SSL状态缓存、还原浏览器默认设置三个方法后还是没能解决，想起重启能解决99%的问题后果断重启电脑，这也是后面悲剧的开始。 电脑重启后，发现打开浏览器依然无法上网，且火狐浏览器等都出现了一样的问题，通过网络诊断得出原因：远程计算机或设备将不接受连接 百度后发现网上的解决方法千篇一律，都是通过Internet——属性——连接——局域网设置——为LAN使用代理服务器的选项去掉勾选就可恢复（也有说将所有复选框都取消勾选） 我满怀希望的尝试后发现然并卵，虽然提示网络状态已连接Internet但是上不了网。。。后来想了想，可能是因为自己用了翻墙上网然后没有退出就重启的关系（如果没用梯子的兄弟姐妹们可以先尝试我上述的方法，行不通的话再试试我后面的方法） 解决方法 可先尝试重新连接关机时使用的翻墙软件 并正常退出，即可访问网络，如果不行再按以下方法 。 非校园网 重置网络：Internet属性——高级——重置 用了科学上网的同学可能I nternet属性 的常规里主页地址会被篡改，可以手动输入成百度地址 设置完成后点确定，然后重启电脑，此时就能恢复访问了。但出错时如果是用着校园网没有退出科学上网就重启的话，此时用校园网还是上不了网，只能用手机开热点的网络上网，于是进一步摸索 校园网 1.先按非校园网方法重置网络 2.删除电脑科学上网的软件 3.重新认证校园网（可以改个密码重新登录） 呜呜，孩子终于又通网了 总结 科学上网时一定要正常进出网络，不能直接关电脑或者断网，否则IP地址还挂在外面网络回不来，所以记得科学上网时 正常退出后再重启电脑 。
Read more