Compile Godot for HTML5 easily

build_javascript.sh

#!/bin/sh -x

# This script must be run from a GNU/Linux system with the Emscripten SDK
# installed and configured.

# Place this script at the root of your Godot Git clone.
# CC0 1.0 Universal


export EMSCRIPTEN_ROOT="/opt/emsdk/emscripten/master"

# Build Godot for HTML5 in debug and release mode
scons p=javascript -j$(nproc) verbose=no tools=no target=release
scons p=javascript -j$(nproc) verbose=no tools=no target=release_debug

cd bin/

# Copy files around to prepare the export templates
# TODO: Check if folder exists before attempting to create it
mkdir javascript_debug/
mkdir javascript_release/
cp godot.javascript.opt.debug.js javascript_debug/godot.js
cp godot.javascript.opt.debug.html.mem javascript_debug/godot.mem
cp ../tools/dist/html_fs/* javascript_debug/

cp godot.javascript.opt.js javascript_release/godot.js
cp godot.javascript.opt.html.mem javascript_release/godot.mem
cp ../tools/dist/html_fs/* javascript_release/

# Compress into .zip to make the export template
cd javascript_debug/
zip -r9 ../javascript_debug.zip *
cd ../javascript_release/
zip -r9 ../javascript_release.zip *

# Copy to Godot's templates folder
cd ../
cp javascript_debug.zip javascript_release.zip $HOME/.godot/templates/

How to compile in Windows?