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Include only necessary fonts for target environment specified by Browserslist (#1674)

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* Include only necessary fonts for target environment specified by Browserslist

Allow WOFF and WOFF2 to be controlled using environment variables

* Fix links

* Fix merge error

* Update dependencies

* Replace uglifyjs-webpack-plugin with terser-webpack-plugin

* Do not set `targets` if !isESMBuild
This commit is contained in:
ylemkimon
2018-12-03 07:51:13 +09:00
committed by Kevin Barabash
parent 64745b5c8a
commit ce3840d4ce
6 changed files with 96 additions and 94 deletions
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30
webpack.common.js
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@@ -1,8 +1,14 @@
// @flow
const path = require('path');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const TerserPlugin = require('terser-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const browserslist = require('browserslist')();
const caniuse = require('caniuse-lite');
// from the least supported to the most supported
const fonts = ['woff2', 'woff', 'ttf'];
/*::
type Target = {|
name: string, // the name of output JS/CSS
@@ -53,11 +59,19 @@ function createConfig(target /*: Target */, dev /*: boolean */,
});
}
const lessOptions = {};
if (process.env.USE_TTF === "false") {
lessOptions.modifyVars = {
'use-ttf': false,
};
// use only necessary fonts, overridable by environment variables
const lessOptions = {modifyVars: {}};
let isCovered = false;
for (const font of fonts) {
const override = process.env[`USE_${font.toUpperCase()}`];
const useFont = override === "true" || override !== "false" && !isCovered;
lessOptions.modifyVars[`use-${font}`] = useFont;
const support = caniuse.feature(caniuse.features[font]).stats;
isCovered = isCovered || useFont && browserslist.every(browser => {
const [name, version] = browser.split(' ');
return !support[name] || support[name][version] === 'y';
});
}
return {
@@ -123,8 +137,8 @@ function createConfig(target /*: Target */, dev /*: boolean */,
optimization: {
minimize,
minimizer: [
new UglifyJsPlugin({
uglifyOptions: {
new TerserPlugin({
terserOptions: {
output: {
ascii_only: true,
},