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DefaultResolver.js
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DefaultResolver.js
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// @flow
import {Resolver} from '@parcel/plugin';
import NodeResolver from '@parcel/node-resolver-core';
// Throw user friendly errors on special webpack loader syntax
// ex. `imports-loader?$=jquery!./example.js`
const WEBPACK_IMPORT_REGEX = /^\w+-loader(?:\?\S*)?!/;
export default (new Resolver({
resolve({dependency, options, specifier}) {
if (WEBPACK_IMPORT_REGEX.test(dependency.specifier)) {
throw new Error(
`The import path: ${dependency.specifier} is using webpack specific loader import syntax, which isn't supported by Parcel.`,
);
}
const resolver = new NodeResolver({
fs: options.inputFS,
projectRoot: options.projectRoot,
// Extensions are always required in URL dependencies.
extensions:
dependency.specifierType === 'commonjs' ||
dependency.specifierType === 'esm'
? ['ts', 'tsx', 'js', 'jsx', 'json']
: [],
mainFields: ['source', 'browser', 'module', 'main'],
});
return resolver.resolve({
filename: specifier,
specifierType: dependency.specifierType,
parent: dependency.resolveFrom,
env: dependency.env,
sourcePath: dependency.sourcePath,
});
},
}): Resolver);