Summary of vue's webpack -v error solution

Xiaobai learned about Vue, then learned about webpack, and then installed various

cnpm is a domestic source and is much faster than international sources. If you don’t know about cnpm, you can check it yourself.

cnpm install -g webpack

After a while, the installation is successful, and I want to check the version of webpack

It prompts me to install webpack-cli, so install it

cnpm install -g webpack-cli

It will be installed after a while. If you look at webpack -v again, the following error will be reported.

$ webpack -v
C:\Users\Administrator\AppData\Roaming\npm\node_modules\webpack-cli\lib\groups\resolveConfig.js:105
        for await (const resolvedOption of finalizedConfigs) {
            ^^^^^
SyntaxError: Unexpected reserved word
    at NativeCompileCache._moduleCompile (C:\Users\Administrator\AppData\Roaming\npm\node_modules\webpack-cli\node_modules\[email protected]@v8-compile-cache\v8-compile-cache.js:240:18)
    at Module._compile (C:\Users\Administrator\AppData\Roaming\npm\node_modules\webpack-cli\node_modules\[email protected]@v8-compile-cache\v8-compile-cache.js:184:36)
    at Object.Module._extensions..js (module.js:664:10)
    at Module.load (module.js:566:32)
    at tryModuleLoad (module.js:506:12)
    at Function.Module._load (module.js:498:3)
    at Module.require (module.js:597:17)
    at require (C:\Users\Administrator\AppData\Roaming\npm\node_modules\webpack-cli\node_modules\[email protected]@v8-compile-cache\v8-compile-cache.js:159:20)
    at Object.<anonymous> (C:\Users\Administrator\AppData\Roaming\npm\node_modules\webpack-cli\lib\webpack-cli.js:14:32)
    at Module._compile (C:\Users\Administrator\AppData\Roaming\npm\node_modules\webpack-cli\node_modules\[email protected]@v8-compile-cache\v8-compile-cache.js:192:30)

Use npm list --depth=0 -g to see which packages are installed.
I also printed out various versions, but reported two errors, which made me, as a programmer with many years of experience, very unhappy.

$ npm list --depth=0 -g
C:\Users\Administrator\AppData\Roaming\npm
[email protected]
+-- [email protected]
+-- [email protected]
-- [email protected]

npm ERR! error in C:\Users\Administrator\AppData\Roaming\npm\node_modules\webpack-cli\node_modules\_@[email protected]@@webpack-cli: ENOENT: no such file or directory, open 'C:\Users\Administrator\AppData\Roaming\npm\node_modules\webpack-cli\node_modules\_@[email protected]@@webpack-cli\package.json'
npm ERR! error in C:\Users\Administrator\AppData\Roaming\npm\node_modules\webpack-cli\node_modules\_@[email protected]@@webpack-cli: ENOENT: no such file or directory, open 'C:\Users\Administrator\AppData\Roaming\npm\node_modules\webpack-cli\node_modules\_@[email protected]@@webpack-cli\package.json'

So I took a closer look and found that the package.json file was missing, so I created a new one, and then it reported an error that it could not be read. Of course, empty content could not be read. I found the file in another directory where the path without the file was prompted, so I copied it to this level and tried to check the versions of each package. There was no error, but webpack -v still did not work and reported the above error. I think it might be a problem with the webpack and webpack-cli versions not matching.

Check the version command:

cnpm view webpack versions

There are too many printed versions to list here. I checked and found that the version on my computer is 4.19.0 and the latest one is 5.4.0.

cnpm view webpack-cli versions

The latest version of webpack-cli is 4.2.0.

It's probably due to version asymmetry.

Then I will uninstall webpack-cli and install it again.

cnpm uninstall weabpack-cli

It only prints "up to date in 0.029s", which seems not very useful. I use npm list --depth=0 -g to find that [email protected] is still there.

Then I looked up how to install the specified version of webpack-cli

Find an older version of the one you just watched.

cnpm install -g [email protected]

After a successful installation

Check npm list --depth=0 -g, the printing is normal and no error is reported.

$ npm list --depth=0 -g
C:\Users\Administrator\AppData\Roaming\npm
[email protected]
+-- [email protected]
+-- [email protected]
-- [email protected]

Then use webpack -v again, no error is reported, and it can be displayed normally

$ webpack -v
4.19.0

So far, the pit climbing is successful~

A long time ago, I read an article about the many pitfalls of different versions of node.js. The same is true for the versions of tools managed by npm. I haven't even learned it yet, and my learning is about to be wasted. The road of a programmer is so difficult! ! !

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