JavaScript - minify js files with google-closure-compiler under npm on Windows

In this short article, we would like to show how to use google-closure-compiler to compile js files to minified versions (*.min.js) on Windows.

The article contains two parts:

1. usage npm / npx,
2. installation with npm.

Simple usage:

npx google-closure-compiler --js=input.js --js_output_file=output.min.js

Note: online version is available here.

Check out this article - JavaScript - minify js files with Google Closure Compiler Service (online)

Compression result:

Note: go to instalation section if you are using compiler first time.

Installation example

In this section, we can see how to install google-closure-compiler using npm. It can take few seconds so be patient until installation will succeed.

Run the following command:

npm install -g google-closure-compiler

Where -g means global installation.

Example output:

C:\Users\john\AppData\Roaming\npm\google-closure-compiler -> C:\Users\john\AppData\Roaming\npm\node_modules\google-closure-compiler\cli.js
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: google-closure-compiler-osx@^20200920.0.0 (node_modules\google-closure-compiler\node_modules\google-closure-compiler-osx):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for google-closure-compiler-osx@20200920.0.0: wanted {"os":"darwin","arch":"x64,x86"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: google-closure-compiler-linux@^20200920.0.0 (node_modules\google-closure-compiler\node_modules\google-closure-compiler-linux):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for google-closure-compiler-linux@20200920.0.0: wanted {"os":"linux","arch":"x64,x86"} (current: {"os":"win32","arch":"x64"})

+ google-closure-compiler@20200920.0.0
added 28 packages from 73 contributors in 271.338s

See also

1. JavaScript - compress js files with terser

References

1. google-closure-compiler online version