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Fix JSX CSS Modules classes (#31)

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Drew Powers 2021-03-26 13:26:36 -06:00 committed by GitHub
parent 3ddd3594f0
commit c7b03776ee
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2 changed files with 18 additions and 13 deletions
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2
examples/snowpack/astro/pages/index.astro
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@ -78,7 +78,7 @@ let description = 'Snowpack is a lightning-fast frontend build tool, designed fo
</a>
<div class="content markdown-body feature-list">
<div class="top">
<div class={'t' + 'o' + 'p'}>
<h2 id="what-is-snowpack%3F">What is Snowpack?</h2>
<p>
<strong>Snowpack is a lightning-fast frontend build tool, designed

29
src/compiler/optimize/styles.ts
View file

@ -182,7 +182,7 @@ export default function ({ filename, fileID }: { filename: string; fileID: strin
},
},
async finalize() {
const allCssModules = new Map<string, string>(); // note: this may theoretically have conflicts, but when written, it shouldn’t because we’re processing everything per-component (if we change this to run across the whole document at once, revisit this)
const allCssModules: Record<string, string> = {}; // note: this may theoretically have conflicts, but when written, it shouldn’t because we’re processing everything per-component (if we change this to run across the whole document at once, revisit this)
const styleTransforms = await Promise.all(styleTransformPromises);
if (!rootNode) {
@ -194,7 +194,7 @@ export default function ({ filename, fileID }: { filename: string; fileID: strin
if (styleNodes[n].attributes) {
// 1a. Add to global CSS Module class list for step 2
for (const [k, v] of result.cssModules) {
allCssModules.set(k, v);
allCssModules[k] = v;
}
// 1b. Inject final CSS
@ -231,16 +231,21 @@ export default function ({ filename, fileID }: { filename: string; fileID: strin
if (node.attributes[j].name !== 'class') continue;
const attr = node.attributes[j];
for (let k = 0; k < attr.value.length; k++) {
if (attr.value[k].type !== 'Text') continue;
const elementClassNames = (attr.value[k].raw as string)
.split(' ')
.map((c) => {
let className = c.trim();
return allCssModules.get(className) || className; // if className matches exactly, replace; otherwise keep original
})
.join(' ');
attr.value[k].raw = elementClassNames;
attr.value[k].data = elementClassNames;
if (attr.value[k].type === 'Text') {
// This class is standard HTML (`class="foo"`). Replace only the classes that match
const elementClassNames = (attr.value[k].raw as string)
.split(' ')
.map((c) => {
let className = c.trim();
return allCssModules[className] || className; // if className matches exactly, replace; otherwise keep original
})
.join(' ');
attr.value[k].raw = elementClassNames;
attr.value[k].data = elementClassNames;
} else if (attr.value[k].type === 'MustacheTag' && attr.value[k]) {
// This class is an expression, so it’s more difficult (`className={'some' + 'expression'}`). We pass all CSS Module names to the expression, and let it find a match, if any
attr.value[k].content = `(${attr.value[k].content}).split(' ').map((className) => (${JSON.stringify(allCssModules)})[className] || className).join(' ')`;
}
}
}
}