/
formats.js
55 lines (46 loc) · 1.2 KB
/
formats.js
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'use strict';
const {
RegExpPrototypeTest,
} = primordials;
const { getOptionValue } = require('internal/options');
const experimentalWasmModules = getOptionValue('--experimental-wasm-modules');
const experimentalSpecifierResolution =
getOptionValue('--experimental-specifier-resolution');
const extensionFormatMap = {
'__proto__': null,
'.cjs': 'commonjs',
'.js': 'module',
'.json': 'json',
'.mjs': 'module',
};
const legacyExtensionFormatMap = {
'__proto__': null,
'.cjs': 'commonjs',
'.js': 'commonjs',
'.json': 'commonjs',
'.mjs': 'module',
'.node': 'commonjs',
};
if (experimentalWasmModules) {
extensionFormatMap['.wasm'] = legacyExtensionFormatMap['.wasm'] = 'wasm';
}
function mimeToFormat(mime) {
if (
RegExpPrototypeTest(
/\s*(text|application)\/javascript\s*(;\s*charset=utf-?8\s*)?/i,
mime
)
) return 'module';
if (mime === 'application/json') return 'json';
if (experimentalWasmModules && mime === 'application/wasm') return 'wasm';
return null;
}
function getLegacyExtensionFormat(ext) {
return legacyExtensionFormatMap[ext];
}
module.exports = {
extensionFormatMap,
getLegacyExtensionFormat,
legacyExtensionFormatMap,
mimeToFormat,
};