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93 lines
2.2 KiB
93 lines
2.2 KiB
2 months ago
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'use strict';
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const browserslist = require('browserslist');
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const { compare, has } = require('./helpers');
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const external = require('./external');
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const aliases = new Map([
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['and_chr', 'chrome-android'],
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['and_ff', 'firefox-android'],
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['ie_mob', 'ie'],
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['ios_saf', 'ios'],
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['oculus', 'quest'],
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['op_mob', 'opera-android'],
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// TODO: Remove from `core-js@4`
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['opera_mobile', 'opera-android'],
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['react', 'react-native'],
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['reactnative', 'react-native'],
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]);
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const validTargets = new Set([
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'android',
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'bun',
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'chrome',
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'chrome-android',
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'deno',
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'edge',
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'electron',
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'firefox',
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'firefox-android',
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'hermes',
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'ie',
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'ios',
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'node',
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'opera',
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'opera-android',
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'phantom',
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'quest',
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'react-native',
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'rhino',
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'safari',
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'samsung',
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]);
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const toLowerKeys = function (object) {
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return Object.entries(object).reduce((accumulator, [key, value]) => {
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accumulator[key.toLowerCase()] = value;
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return accumulator;
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}, {});
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};
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module.exports = function (targets) {
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const { browsers, esmodules, node, ...rest } = (typeof targets != 'object' || Array.isArray(targets))
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? { browsers: targets } : toLowerKeys(targets);
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const list = Object.entries(rest);
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if (browsers) {
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if (typeof browsers == 'string' || Array.isArray(browsers)) {
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list.push(...browserslist(browsers).map(it => it.split(' ')));
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} else {
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list.push(...Object.entries(browsers));
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}
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}
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if (esmodules) {
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list.push(...Object.entries(external.modules));
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}
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if (node) {
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list.push(['node', node === 'current' ? process.versions.node : node]);
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}
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const normalized = list.map(([engine, version]) => {
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if (has(browserslist.aliases, engine)) {
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engine = browserslist.aliases[engine];
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}
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if (aliases.has(engine)) {
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engine = aliases.get(engine);
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}
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return [engine, String(version)];
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}).filter(([engine]) => {
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return validTargets.has(engine);
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}).sort(([a], [b]) => {
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return a < b ? -1 : a > b ? 1 : 0;
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});
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const reducedByMinVersion = new Map();
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for (const [engine, version] of normalized) {
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if (!reducedByMinVersion.has(engine) || compare(version, '<=', reducedByMinVersion.get(engine))) {
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reducedByMinVersion.set(engine, version);
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}
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}
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return reducedByMinVersion;
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};
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