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fix(package): specify side-effects in package.json #383

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fix(package): specify side-effects in package.json #383

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11 changes: 8 additions & 3 deletions gulp/package-task.js
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,11 @@ export const packageTask = ((cache) => memoizeTask(cache, function bundle(target

export default packageTask;

const sideEffects = [
"./asynciterable/todomstream.mjs",
"./asynciterable/todomstream.js"
];

const createMainPackageJson = (target, format) => (orig) => ({
...createTypeScriptPackageJson(target, format)(orig),
bin: orig.bin,
Expand Down Expand Up @@ -48,7 +53,7 @@ const createMainPackageJson = (target, format) => (orig) => ({
},
'./*': createDualExport('*'),
},
sideEffects: false,
sideEffects,
esm: { mode: `all`, sourceMap: true }
});

Expand All @@ -60,7 +65,7 @@ const createTypeScriptPackageJson = (target, format) => (orig) => ({
types: `node.ts`,
browser: `dom.ts`,
type: 'module',
sideEffects: false,
sideEffects,
esm: { mode: `auto`, sourceMap: true },
dependencies: {
'@types/node': '*',
Expand Down Expand Up @@ -88,7 +93,7 @@ const createScopedPackageJSON = (target, format) => (({ name, ...orig }) =>
// set "module" if building scoped ESM target
module: format === 'esm' || format === 'cls' ? `node.js` : undefined,
// set "sideEffects" to false as a hint to Webpack that it's safe to tree-shake the ESM target
sideEffects: format === 'esm' || format === 'cls' ? false : undefined,
sideEffects: format === 'esm' || format === 'cls' ? sideEffects : undefined,
// include "esm" settings for https://www.npmjs.com/package/esm if building scoped ESM target
esm: format === `esm` ? { mode: `auto`, sourceMap: true } : undefined,
// set "types" to "dom" if building scoped UMD target, otherwise "node"
Expand Down