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yarnをインストールします。
◆環境| OS | Windows 10 Home 20H2 64bit OS x64 プロセッサ |
|---|
yarn
yarn(ヤーン)はNode.jsの公式のnpmと互換性があるJavaScriptのパッケージマネージャーとのことです。
npmよりyarnの方が良いらしいです。
PowerShellでのchocolateyを使ったyarnのインストールコマンドです。
choco install yarn -y
PowerShellを管理者で実行しコマンドを実行します。
PS C:\Windows\system32> choco install yarn -y
Chocolatey v0.11.3
Installing the following packages:
yarn
By installing, you accept licenses for the packages.
Progress: Downloading yarn 1.22.15... 100%
yarn v1.22.15 [Approved]
yarn package files install completed. Performing other installation s
teps.
Downloading yarn
from 'https://yarnpkg.com/downloads/1.22.15/yarn-1.22.15.msi'
Progress: 100% - Completed download of C:\Users\xxxxx\AppData\Local\T
emp\chocolatey\yarn\1.22.15\yarn-1.22.15.msi (1.6 MB).
Download of yarn-1.22.15.msi (1.6 MB) completed.
Hashes match.
Installing yarn...
yarn has been installed.
#< CLIXML
<Objs Version="1.1.0.1" xmlns="http://schemas.microsoft.com/powershel
l/2004/04"><Obj S="progress" RefId="0"><TN RefId="0"><T>System.Mana
gement.Automation.PSCustomObject</T><T>System.Object</T></TN><MS><I
:
略 40～50行
:
0
Only an exit code of non-zero will fail the package by default. Set
`--failonstderr` if you want error messages to also fail a script. S
ee
`choco -h` for details.
yarn may be able to be automatically uninstalled.
Environment Vars (like PATH) have changed. Close/reopen your shell to
see the changes (or in powershell/cmd.exe just type `refreshenv`).
The install of yarn was successful.
Software installed as 'msi', install location is likely default.
Chocolatey installed 1/1 packages.
See the log for details (C:\ProgramData\chocolatey\logs\chocolatey.l
og).
PS C:\Windows\system32>
Chocolatey v0.11.3
Installing the following packages:
yarn
By installing, you accept licenses for the packages.
Progress: Downloading yarn 1.22.15... 100%
yarn v1.22.15 [Approved]
yarn package files install completed. Performing other installation s
teps.Downloading yarn
from 'https://yarnpkg.com/downloads/1.22.15/yarn-1.22.15.msi'
Progress: 100% - Completed download of C:\Users\xxxxx\AppData\Local\T
emp\chocolatey\yarn\1.22.15\yarn-1.22.15.msi (1.6 MB).Download of yarn-1.22.15.msi (1.6 MB) completed.
Hashes match.
Installing yarn...
yarn has been installed.
#< CLIXML
<Objs Version="1.1.0.1" xmlns="http://schemas.microsoft.com/powershel
l/2004/04"><Obj S="progress" RefId="0"><TN RefId="0"><T>System.Management.Automation.PSCustomObject</T><T>System.Object</T></TN><MS><I:
略 40～50行
:
0
Only an exit code of non-zero will fail the package by default. Set
`--failonstderr` if you want error messages to also fail a script. S
ee`choco -h` for details.
yarn may be able to be automatically uninstalled.
Environment Vars (like PATH) have changed. Close/reopen your shell to
see the changes (or in powershell/cmd.exe just type `refreshenv`).
The install of yarn was successful.
Software installed as 'msi', install location is likely default.
Chocolatey installed 1/1 packages.
See the log for details (C:\ProgramData\chocolatey\logs\chocolatey.l
og).PS C:\Windows\system32>
赤い文字の行が40～50行ぐらいどばっと出たので何かエラーが発生したのかと思いましたが「The install of yarn was successful.」と表示されているので正常にインストールされたのでしょうか。
環境変数が変更されたのでシェル(PowerShell or cmd)を閉じて再度開いてくださいと表示されているので、いったんPowerShellを閉じて開きなおします。
バージョンを確認します。
PS C:\Windows\system32> yarn --version
1.22.15
PS C:\Windows\system32>
1.22.15
PS C:\Windows\system32>
2025/11/22 追記
yarnのバージョンは1.22.22になっていました。
> yarn --version
1.22.22
1.22.22
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