[6a3a178] | 1 | 'use strict';
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| 2 | const browserslist = require('browserslist');
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| 3 | const { compare, has } = require('./helpers');
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| 4 | const external = require('./external');
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| 5 |
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| 6 | const aliases = new Map([
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| 7 | ['and_chr', 'chrome'],
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| 8 | ['and_ff', 'firefox'],
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| 9 | ['ie_mob', 'ie'],
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| 10 | ['ios_saf', 'ios'],
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| 11 | ['op_mob', 'opera_mobile'],
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| 12 | ]);
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| 13 |
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| 14 | const validTargets = new Set([
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| 15 | 'android',
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| 16 | 'chrome',
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| 17 | 'deno',
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| 18 | 'edge',
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| 19 | 'electron',
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| 20 | 'firefox',
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| 21 | 'ie',
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| 22 | 'ios',
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| 23 | 'node',
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| 24 | 'opera',
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| 25 | 'opera_mobile',
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| 26 | 'phantom',
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| 27 | 'rhino',
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| 28 | 'safari',
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| 29 | 'samsung',
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| 30 | ]);
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| 31 |
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| 32 | module.exports = function (targets) {
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| 33 | if (typeof targets !== 'object' || Array.isArray(targets)) {
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| 34 | targets = { browsers: targets };
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| 35 | }
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| 36 |
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| 37 | const { browsers, esmodules, node, ...rest } = targets;
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| 38 | const list = Object.entries(rest);
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| 39 |
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| 40 | if (browsers) {
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| 41 | if (typeof browsers === 'string' || Array.isArray(browsers)) {
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| 42 | list.push(...browserslist(browsers).map(it => it.split(' ')));
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| 43 | } else {
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| 44 | list.push(...Object.entries(browsers));
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| 45 | }
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| 46 | }
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| 47 | if (esmodules) {
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| 48 | list.push(...Object.entries(external.modules));
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| 49 | }
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| 50 | if (node) {
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| 51 | list.push(['node', node === 'current' ? process.versions.node : node]);
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| 52 | }
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| 53 |
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| 54 | const normalized = list.map(([engine, version]) => {
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| 55 | if (has(browserslist.aliases, engine)) {
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| 56 | engine = browserslist.aliases[engine];
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| 57 | }
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| 58 | if (aliases.has(engine)) {
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| 59 | engine = aliases.get(engine);
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| 60 | }
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| 61 | return [engine, String(version)];
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| 62 | }).filter(([engine]) => {
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| 63 | return validTargets.has(engine);
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| 64 | }).sort(([a], [b]) => {
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| 65 | return a < b ? -1 : a > b ? 1 : 0;
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| 66 | });
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| 67 |
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| 68 | const reducedByMinVersion = new Map();
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| 69 | for (const [engine, version] of normalized) {
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| 70 | if (!reducedByMinVersion.has(engine) || compare(version, '<=', reducedByMinVersion.get(engine))) {
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| 71 | reducedByMinVersion.set(engine, version);
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| 72 | }
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| 73 | }
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| 74 |
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| 75 | return reducedByMinVersion;
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| 76 | };
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