48 lines
1.2 KiB
JavaScript
48 lines
1.2 KiB
JavaScript
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// Manually “tree shaken” from:
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// <https://github.com/nodejs/node/blob/81a9a97/lib/internal/modules/esm/utils.js>
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// Last checked on: Apr 29, 2024.
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import {codes} from './errors.js'
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const {ERR_INVALID_ARG_VALUE} = codes
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// In Node itself these values are populated from CLI arguments, before any
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// user code runs.
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// Here we just define the defaults.
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const DEFAULT_CONDITIONS = Object.freeze(['node', 'import'])
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const DEFAULT_CONDITIONS_SET = new Set(DEFAULT_CONDITIONS)
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/**
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* Returns the default conditions for ES module loading.
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*/
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function getDefaultConditions() {
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return DEFAULT_CONDITIONS
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}
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/**
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* Returns the default conditions for ES module loading, as a Set.
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*/
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function getDefaultConditionsSet() {
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return DEFAULT_CONDITIONS_SET
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}
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/**
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* @param {Array<string>} [conditions]
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* @returns {Set<string>}
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*/
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export function getConditionsSet(conditions) {
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if (conditions !== undefined && conditions !== getDefaultConditions()) {
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if (!Array.isArray(conditions)) {
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throw new ERR_INVALID_ARG_VALUE(
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'conditions',
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conditions,
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'expected an array'
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)
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}
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return new Set(conditions)
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}
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return getDefaultConditionsSet()
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}
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