Optimize Elm code with uglify-js 3

[David-Klemenc]

Quick Summary: Instructions for optimization script should be updated for the new backwards incompatible version of uglify-js

SSCCE

#!/bin/sh

set -e

js="app.js"
min="app.min.js"

elm make --optimize --output=$js $@

# piping no longer needed !?
uglifyjs $js --compress "pure_funcs=[F2,F3,F4,F5,F6,F7,F8,F9,A2,A3,A4,A5,A6,A7,A8,A9],pure_getters,keep_fargs=false,unsafe_comps,unsafe" --mangle --output $min

echo "Initial size: $(cat $js | wc -c) bytes  ($js)"
echo "Minified size:$(cat $min | wc -c) bytes  ($min)"
echo "Gzipped size: $(cat $min | gzip -c | wc -c) bytes"

• Elm: 0.19.1

Additional Details

With the new version of uglify-js (tested with uglify-js 3.10.0) piping is no longer needed (I tested with a 20 kloc elm program - and it works as expected)

Pages that should be updated:

• How to optimize Elm code
• Minification

EDIT

Switched to terser

# ...
terser $js --compress "pure_funcs=[F2,F3,F4,F5,F6,F7,F8,F9,A2,A3,A4,A5,A6,A7,A8,A9],pure_getters,keep_fargs=false,unsafe_comps,unsafe" --mangle --output=$min
# ...

as per PR#2076

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