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Parse CSS classes more acurrately with AST parser #6

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Parse CSS classes more acurrately with AST parser #6

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cec0f24
Don't add unique prefix to empty string classNames
constgen Apr 19, 2019
08666b2
Don't check for an external path
constgen Apr 19, 2019
397314e
increase version to 0.2.81
nairinarinyan May 6, 2019
2c7951e
Use CSS AST parser instead of Regular Expressions
constgen Jul 21, 2019
c511cd7
Merge branch 'master' into css-ast-parser
constgen Jul 21, 2019
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4 changes: 3 additions & 1 deletion package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -23,5 +23,7 @@
"@types/webpack": "^4.4.24",
"typescript": "^3.3.1"
},
"dependencies": {}
"dependencies": {
"css-tree": "^1.0.0-alpha.33"
}
}
26 changes: 14 additions & 12 deletions src/style-loader.ts
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Original file line number Diff line number Diff line change
@@ -1,21 +1,23 @@
import csstree from 'css-tree';
import { createDirHash } from './lib/dirhash';
import { LoaderContext } from './options';

export default function styleLoader(this: LoaderContext, source: string): string {
const { globalsPrefix = 'app' } = this.query;
const [dirName, dirHash] = createDirHash(this.context);
const ast = csstree.parse(source);

const classLineRegex = /(.*(\..*?)(?<!;)$)/gm;
const classRegex = new RegExp(`(?<=\\.)((?!${globalsPrefix}-)\\w+[\\w-]*\\b)`, 'g');

if (!source.match(classLineRegex)) {
return source;
}
csstree.walk(ast, {
visit: 'ClassSelector',
enter: function(node) {
const className = node.name

const [dirName, dirHash] = createDirHash(this.context);
if (className.startsWith(globalsPrefix)) return;
node.name = `${dirName}-${dirHash}-${className}`;
}
});

return source.replace(classLineRegex, matchingLine =>
matchingLine.replace(classRegex, className =>
`${dirName}-${dirHash}-${className}`
)
);
return csstree.generate(ast, {
sourceMap: false // if true, returns object instead of string
});
};