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Compress away all unused tokens in ESM bundle #1507

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Merged
merged 2 commits into from
Aug 27, 2021
Merged

Compress away all unused tokens in ESM bundle #1507

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19a7be4
Compress away all unused tokens in ESM bundle
calebeby Aug 27, 2021
8215216
Make the output a little more readable
calebeby Aug 27, 2021
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5 changes: 5 additions & 0 deletions .changeset/tasty-bugs-talk.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
'@cloudfour/patterns': minor
---

Compress away all unused tokens in ESM bundle
13 changes: 12 additions & 1 deletion gulpfile.js/tasks/build-scripts.js
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Expand Up @@ -40,6 +40,13 @@ const createVirtualRootEntry = async () => {
.join('\n');
};

/** @type {import('terser').MinifyOptions} */
const terserESMOpts = {
compress: { passes: 6, join_vars: false, sequences: false },
module: true,
mangle: false,
};

// The \0 is used to prevent the module name from being a real module name
const virtualRootModule = '\0virtual-root-module';
const virtualRootPlugin = () => ({
Expand All @@ -60,7 +67,11 @@ const buildJS = async () => {
],
});
await Promise.all([
bundle.write({ format: 'esm', file: path.join(outDir, `${pathName}.mjs`) }),
bundle.write({
format: 'esm',
file: path.join(outDir, `${pathName}.mjs`),
plugins: terser(terserESMOpts),
}),
bundle.write({
format: 'umd',
name: globalName,
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