elsanussi-s-mneina/How_to_get_gopher_js_running_on_Mac_OS_BigSur.txt

## How_to_get_gopher_js_running_on_Mac_OS_BigSur.txt
Notes on Gopherjs installation on MacOS BigSur:

First you must know the version number to know if these notes are relevant to you:
% sw_vers
ProductName:	macOS
ProductVersion:	11.6.1
BuildVersion:	20G224

% go version
go version go1.17.5 darwin/amd64

% ~/go/bin/gopherjs version
GopherJS 1.17.1+go1.17.3


1. You must have already added ~/go/bin to your PATH environment variable. This is where Go installs executables when you run the "go install" command.
2. run:
  go install github.com/gopherjs/gopherjs@latest
Don't do the instructions they suggest. go get is deprecated the way it was indicated in the ReadMe file.
3. Run the following three commands. These are indicated in the readme, but they still use the deprecated go get instead of go install. I have fixed that in the following three lines.

go install golang.org/dl/go1.17.1@latest
go1.17.1 download

export GOPHERJS_GOROOT="$(~/go/bin/go1.17.1 env GOROOT)"

5. This is how you would generate an exampleAlert.js (javascript) file from a Go program.
gopherjs build -m exampleAlert.go


Note here are the contents of the exampleAlert.go program (after the cat command)
% cat exampleAlert.go
package main

import (
	"syscall/js"
)

func main() {
	//fmt.Println("Hello, playground")
	js.Global().Call("alert", "Hello, JavaScript")
	println("Hello, JS console")
}

5. Create an HTML file for example "index.html", be sure to import the javascript file.

% cat index.html
<html>
	<head>
		<title>Hello alert example</title>
	</head>
	<body>
		<script src="exampleAlert.js"></script>
	</body>
</html>


4. On MacOS BigSur, do not use the fmt package because you will get a runtime error. According to the Issue on Github for gopherJS you should set the GOOS variable to linux, but I have not verified this working. They will fix this in the next version of GopherJS.

Notes written on December 22, 2021
This work (this text file) is licensed under a Creative Commons Attribution 4.0 International License.
	Notes on Gopherjs installation on MacOS BigSur:

	First you must know the version number to know if these notes are relevant to you:
	% sw_vers
	ProductName: macOS
	ProductVersion: 11.6.1
	BuildVersion: 20G224

	% go version
	go version go1.17.5 darwin/amd64

	% ~/go/bin/gopherjs version
	GopherJS 1.17.1+go1.17.3


	1. You must have already added ~/go/bin to your PATH environment variable. This is where Go installs executables when you run the "go install" command.
	2. run:
	go install github.com/gopherjs/gopherjs@latest
	Don't do the instructions they suggest. go get is deprecated the way it was indicated in the ReadMe file.
	3. Run the following three commands. These are indicated in the readme, but they still use the deprecated go get instead of go install. I have fixed that in the following three lines.

	go install golang.org/dl/go1.17.1@latest
	go1.17.1 download

	export GOPHERJS_GOROOT="$(~/go/bin/go1.17.1 env GOROOT)"

	5. This is how you would generate an exampleAlert.js (javascript) file from a Go program.
	gopherjs build -m exampleAlert.go


	Note here are the contents of the exampleAlert.go program (after the cat command)
	% cat exampleAlert.go
	package main

	import (
	"syscall/js"
	)

	func main() {
	//fmt.Println("Hello, playground")
	js.Global().Call("alert", "Hello, JavaScript")
	println("Hello, JS console")
	}

	5. Create an HTML file for example "index.html", be sure to import the javascript file.

	% cat index.html
	<html>
	<head>
	<title>Hello alert example</title>
	</head>
	<body>
	<script src="exampleAlert.js"></script>
	</body>
	</html>




	4. On MacOS BigSur, do not use the fmt package because you will get a runtime error. According to the Issue on Github for gopherJS you should set the GOOS variable to linux, but I have not verified this working. They will fix this in the next version of GopherJS.

	Notes written on December 22, 2021
	This work (this text file) is licensed under a Creative Commons Attribution 4.0 International License.