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Fix interaction with other plugins #647

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merged 3 commits into from Apr 12, 2021
Merged

Fix interaction with other plugins #647

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48aa446
test: Add (failing) test for working with other plugins
rluba Apr 7, 2021
d967fa1
fix: PurgeCSS must run on exit to work with other plugins
rluba Apr 7, 2021
62cbf1c
chore: cleanup
rluba Apr 7, 2021
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3 changes: 3 additions & 0 deletions packages/postcss-purgecss/__tests__/fixtures/expected/other-plugins.css
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@@ -0,0 +1,3 @@
.prefixed-used-class {
color: black;
}
11 changes: 11 additions & 0 deletions packages/postcss-purgecss/__tests__/fixtures/src/other-plugins/other-plugins.css
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@@ -0,0 +1,11 @@
.used-class {
color: black;
}

.unused-class {
color: black;
}

.another-one-not-found {
color: black;
}
8 changes: 8 additions & 0 deletions packages/postcss-purgecss/__tests__/fixtures/src/other-plugins/other-plugins.html
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@@ -0,0 +1,8 @@
<html>

<body>

<div class="prefixed-used-class"></div>
</body>

</html>
27 changes: 27 additions & 0 deletions packages/postcss-purgecss/__tests__/index.test.ts
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Expand Up @@ -82,4 +82,31 @@ describe("Purgecss postcss plugin", () => {
done();
});
});

it(`lets other plugins transform selectors before purging`, async () => {
const input = fs
.readFileSync(`${__dirname}/fixtures/src/other-plugins/other-plugins.css`)
.toString();
const expected = fs
.readFileSync(`${__dirname}/fixtures/expected/other-plugins.css`)
.toString();
const result = await postcss([
{
postcssPlugin: "postcss-test-prefixer",
Rule(rule) {
if (rule.selector.startsWith(".")) {
rule.selector = ".prefixed-" + rule.selector.slice(1);
}
},
},
purgeCSSPlugin({
content: [`${__dirname}/fixtures/src/other-plugins/other-plugins.html`],
fontFace: true,
keyframes: true,
}),
]).process(input, { from: undefined });

expect(result.css).toBe(expected);
expect(result.warnings().length).toBe(0);
});
});
2 changes: 1 addition & 1 deletion packages/postcss-purgecss/src/index.ts
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Expand Up @@ -77,7 +77,7 @@ const purgeCSSPlugin: postcss.PluginCreator<UserDefinedOptions> = function (
throw new Error("PurgeCSS plugin does not have the correct options");
return {
postcssPlugin: PLUGIN_NAME,
Once(root, helpers) {
OnceExit(root, helpers) {
return purgeCSS(opts, root, helpers);
},
};
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