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index.js
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index.js
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import { indexDependencyDependency } from "./index-dependency";
import "./index.css";
indexDependencyDependency();
it("correct module order with \"sideEffects\": [\"*.css\"]", function (done) {
const postOrder = __STATS__.modules
.filter(mod => mod.name.endsWith(".css"))
.map(mod => ({ module: mod.name, postOrderIndex: mod.postOrderIndex }));
console.log(postOrder);
// this is the order we'd get if we don't use `"sideEffects": ["*.css"]` in package.json
// since mini-css-extract-plugin loads .css modules in postOrder order
// our css classes would be index-dependency-dependency.css (least important) -> index-dependency.css -> index.css
expect(postOrder).toStrictEqual([
{ module: "./index.css", postOrderIndex: 5 },
{ module: "./index-dependency.css", postOrderIndex: 3 },
{ module: "./index-dependency-dependency.css", postOrderIndex: 1 }
]);
// this is the actual order with `"sideEffects": ["*.css"]`
const actualOrder = [
{ module: './index.css', postOrderIndex: 1 },
// bug: index-dependency-depednency.css will override index.css, even though in reality it was imported first
{ module: './index-dependency-dependency.css', postOrderIndex: 2 },
// another bug: index-dependency.css is missing from the bundle entirely, even though it should be loaded
{ module: './index-dependency.css', postOrderIndex: null }
]
done();
});