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23 lines
526 B
23 lines
526 B
3 years ago
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'use strict';
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const builtinModules = require('builtin-modules');
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const moduleSet = new Set(builtinModules);
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const NODE_PROTOCOL = 'node:';
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module.exports = moduleName => {
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if (typeof moduleName !== 'string') {
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throw new TypeError('Expected a string');
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}
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if (moduleName.startsWith(NODE_PROTOCOL)) {
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moduleName = moduleName.slice(NODE_PROTOCOL.length);
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}
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const slashIndex = moduleName.indexOf('/');
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if (slashIndex !== -1) {
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moduleName = moduleName.slice(0, slashIndex);
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}
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return moduleSet.has(moduleName);
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};
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