解决npm ERR! Cannot read properties of null (reading ‘pickAlgorithm‘)(解决口苦最快的方法)

解决npm ERR! Cannot read properties of null (reading ‘pickAlgorithm‘) 文章目录1. 复现问题2. 分析问题3. 解决问题

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1. 复现问题

今天准备克隆Redis桌面(GUI)管理客户端，故按照官方文档给出的指令运行时，如下图所示：

但在执行指令npm install --platform=win32却报出如下图错误：

PS D:\Software\RedisDesktopManager\AnotherRedisDesktopManager> npm install --platform=win32npm WARN config global `--global`, `--local` are deprecated. Use `--location=global` instead.npm WARN deprecated chokidar@2.1.8: Chokidar 2 does not receive security updates since 2019. Upgrade to chokidar 3 with 15x fewer dependenciesnpm WARN deprecated chokidar@2.1.8: Chokidar 2 does not receive security updates since 2019. Upgrade to chokidar 3 with 15x fewer dependenciesnpm WARN deprecated stable@0.1.8: Modern JS already guarantees Array#sort() is a stable sort, so this library is deprecated. See the compatibility table on MDN: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort#browser_compatibilitynpm WARN deprecated electron-osx-sign@0.5.0: Please use @electron/osx-sign moving forward. Be aware the API is slightly differentnpm WARN deprecated querystring@0.2.0: The querystring API is considered Legacy. new code should use the URLSearchParams API instead.npm WARN deprecated uuid@3.4.0: Please upgrade to version 7 or higher. Older versions may use Math.random() in certain circumstances, which is known to be problematic. See https://v8.dev/blog/math-random for details.npm WARN deprecated debug@4.1.1: Debug versions >=3.2.0 <3.2.7 || >=4 <4.3.1 have a low-severity ReDos regression when used in a Node.js environment. It is recommended you upgrade to 3.2.7 or 4.3.1. (https://github.com/visionmedia/debug/issues/797)npm WARN deprecated browserslist@1.7.7: Browserslist 2 could fail on reading Browserslist >3.0 config used in other tools.npm WARN deprecated browserslist@1.7.7: Browserslist 2 could fail on reading Browserslist >3.0 config used in other tools.npm WARN deprecated browserslist@1.7.7: Browserslist 2 could fail on reading Browserslist >3.0 config used in other tools.npm WARN deprecated svgo@0.7.2: This SVGO version is no longer supported. Upgrade to v2.x.x.npm WARN deprecated debug@4.1.1: Debug versions >=3.2.0 <3.2.7 || >=4 <4.3.1 have a low-severity ReDos regression when used in a Node.js environment. It is recommended you upgrade to 3.2.7 or 4.3.1. (https://github.com/visionmedia/debug/issues/797)npm WARN deprecated svgo@1.3.2: This SVGO version is no longer supported. Upgrade to v2.x.x.npm ERR! Cannot read properties of null (reading 'pickAlgorithm')npm ERR! A complete log of this run can be found in:npm ERR! C:\Users\zxy\AppData\Local\npm-cache\_logs\2022-11-04T07_24_57_963Z-debug-0.log

注意看上述错误的倒数第3行，即Cannot read properties of null (reading 'pickAlgorithm')

2. 分析问题

Cannot read properties of null (reading 'pickAlgorithm')翻译成中文就是无法读取 null 的属性（读取 'pickAlgorithm'）

但是，我在运行指令npm install --platform=win32时，并没有涉及pickAlgorithm字段呀，于是，通过查找资料可得如下解决方案:

方案1

重新安装node解决，这并没有解决我的问题，舍弃。

方案2

删了node models重新下。

或者直接下载CNPM（淘宝镜像）进行安装CNPM安装办法：

npm install -g cnpm -registry=https://registry.npm.taobao.org

查看cnpm是否真安装成功:

cnpm -v

这种方式也没有解决我的问题。

于是，使用如下第3种方案解决了我的问题。

3. 解决问题在终端输入指令npm cache clear --force，如下所示：PS D:\Software\RedisDesktopManager\AnotherRedisDesktopManager> npm cache clear --forcenpm WARN config global `--global`, `--local` are deprecated. Use `--location=global` instead.npm WARN using --force Recommended protections disabled.再次执行指令npm install --platform=win32，即可完成安装，如下所示：PS D:\Software\RedisDesktopManager\AnotherRedisDesktopManager> npm install --platform=win32npm WARN config global `--global`, `--local` are deprecated. Use `--location=global` instead.npm WARN deprecated uuid@3.4.0: Please upgrade to version 7 or higher. Older versions may use Math.random() in certain circumstances, which is known to be problematic. See https://v8.dev/blog/math-random for details.npm WARN deprecated browserslist@2.11.3: Browserslist 2 could fail on reading Browserslist >3.0 config used in other tools.npm WARN deprecated debug@4.1.1: Debug versions >=3.2.0 <3.2.7 || >=4 <4.3.1 have a low-severity ReDos regression when used in a Node.js environment. It is recommended you upgrade to 3.2.7 or 4.3.1. (https://github.com/visionmedia/debug/issues/797)npm WARN deprecated uuid@3.3.2: Please upgrade to version 7 or higher. Older versions may use Math.random() in certain circumstances, which is known to be problematic. See https://v8.dev/blog/math-random for details.npm WARN deprecated electron-osx-sign@0.5.0: Please use @electron/osx-sign moving forward. Be aware the API is slightly differentnpm WARN deprecated svgo@0.7.2: This SVGO version is no longer supported. Upgrade to v2.x.x.npm WARN deprecated browserslist@1.7.7: Browserslist 2 could fail on reading Browserslist >3.0 config used in other tools.npm WARN deprecated chokidar@2.1.8: Chokidar 2 does not receive security updates since 2019. Upgrade to chokidar 3 with 15x fewer dependenciesnpm WARN deprecated browserslist@1.7.7: Browserslist 2 could fail on reading Browserslist >3.0 config used in other tools.npm WARN deprecated browserslist@1.7.7: Browserslist 2 could fail on reading Browserslist >3.0 config used in other tools.npm WARN deprecated svgo@1.3.2: This SVGO version is no longer supported. Upgrade to v2.x.x.added 706 packages, and changed 55 packages in 2m93 packages are looking for funding run `npm fund` for details输入npm start启动程序，如下图所示：

此时，报出另外一个错误，即 Cannot find module 'D:\Software\RedisDesktopManager\AnotherRedisDesktopManager\node_modules\fs.realpath\index.js'. Please verify that the package.json has a valid "main" entry。

即在当前目录下找不到index.js文件，于是，我们去当前目录下区创建该文件即可：

创建index.js文件后，再次执行npm start指令，即可启动程序了，如下所示：