This is a simple example of a WASM file generated using Go. You can change the following slider to modify a gray scale for this gopher. This image manipulation is not done using JS, is actually performed by a Go program running into your browser.
Find more in this Medium blog post here
Execute:
make start
To compile Go program into a .wasm file and serve it through nginx listening in port :8080
Then go to http://localhost:8080.
