501 lines
15 KiB
JavaScript
501 lines
15 KiB
JavaScript
var caniuse = require('caniuse-db/data.json').agents;
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var path = require('path');
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var fs = require('fs');
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var FLOAT = /^\d+(\.\d+)?$/;
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function uniq(array) {
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var filtered = [];
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for ( var i = 0; i < array.length; i++ ) {
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if ( filtered.indexOf(array[i]) === -1 ) filtered.push(array[i]);
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}
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return filtered;
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}
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function BrowserslistError(message) {
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this.name = 'BrowserslistError';
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this.message = message || '';
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if ( Error.captureStackTrace ) {
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Error.captureStackTrace(this, BrowserslistError);
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}
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}
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BrowserslistError.prototype = Error.prototype;
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function error(name) {
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var obj = new BrowserslistError(name);
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obj.browserslist = true;
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throw obj;
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}
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// Helpers
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var normalize = function (versions) {
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return versions.filter(function (version) {
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return typeof version === 'string';
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});
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};
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var fillUsage = function (result, name, data) {
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for ( var i in data ) {
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result[name + ' ' + i] = data[i];
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}
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};
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// Return array of browsers by selection queries:
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//
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// browserslist('IE >= 10, IE 8') //=> ['ie 11', 'ie 10', 'ie 8']
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var browserslist = function (selections, opts) {
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if ( typeof opts === 'undefined' ) opts = { };
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if ( typeof selections === 'undefined' || selections === null ) {
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if ( process.env.BROWSERSLIST ) {
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selections = process.env.BROWSERSLIST;
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} else if ( opts.config || process.env.BROWSERSLIST_CONFIG ) {
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var file = opts.config || process.env.BROWSERSLIST_CONFIG;
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if ( fs.existsSync(file) && fs.statSync(file).isFile() ) {
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selections = browserslist.parseConfig( fs.readFileSync(file) );
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} else {
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error('Can\'t read ' + file + ' config');
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}
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} else {
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var config = browserslist.readConfig(opts.path);
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if ( config !== false ) {
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selections = config;
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} else {
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selections = browserslist.defaults;
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}
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}
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}
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if ( typeof selections === 'string' ) {
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selections = selections.split(/,\s*/);
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}
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if ( opts.stats || process.env.BROWSERSLIST_STATS ) {
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browserslist.usage.custom = { };
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var stats = opts.stats || process.env.BROWSERSLIST_STATS;
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if ( typeof stats === 'string' ) {
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try {
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stats = JSON.parse(fs.readFileSync(stats));
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} catch (e) {
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error('Can\'t read ' + stats);
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}
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}
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if ( 'dataByBrowser' in stats ) {
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// Allow to use the data as-is from the caniuse.com website
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stats = stats.dataByBrowser;
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}
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for ( var browser in stats ) {
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fillUsage(browserslist.usage.custom, browser, stats[browser]);
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}
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}
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var result = [];
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var exclude, query, match, array, used;
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selections.forEach(function (selection) {
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if ( selection.trim() === '' ) return;
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exclude = false;
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used = false;
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if ( selection.indexOf('not ') === 0 ) {
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selection = selection.slice(4);
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exclude = true;
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}
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for ( var i in browserslist.queries ) {
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query = browserslist.queries[i];
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match = selection.match(query.regexp);
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if ( match ) {
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array = query.select.apply(browserslist, match.slice(1));
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if ( exclude ) {
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result = result.filter(function (j) {
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return array.indexOf(j) === -1;
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});
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} else {
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result = result.concat(array);
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}
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used = true;
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break;
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}
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}
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if ( !used ) {
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error('Unknown browser query `' + selection + '`');
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}
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});
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result = uniq(result);
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return result.filter(function (i) {
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var version = i.split(' ')[1];
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if ( version === '0' ) {
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var name = i.split(' ')[0];
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return !result.some(function (j) {
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return j !== i && j.split(' ')[0] === name;
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});
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} else {
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return true;
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}
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}).sort(function (name1, name2) {
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name1 = name1.split(' ');
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name2 = name2.split(' ');
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if ( name1[0] === name2[0] ) {
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if ( FLOAT.test(name1[1]) && FLOAT.test(name2[1]) ) {
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var d = parseFloat(name2[1]) - parseFloat(name1[1]);
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if ( d > 0 ) {
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return 1;
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} else if ( d < 0 ) {
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return -1;
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} else {
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return 0;
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}
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} else {
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return name2[1].localeCompare(name1[1]);
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}
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} else {
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return name1[0].localeCompare(name2[0]);
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}
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});
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};
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var normalizeVersion = function (data, version) {
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if ( data.versions.indexOf(version) !== -1 ) {
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return version;
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} else {
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return browserslist.versionAliases[data.name][version];
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}
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};
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var loadCountryStatistics = function (country) {
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if (!browserslist.usage[country]) {
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var usage = { };
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var data = require(
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'caniuse-db/region-usage-json/' + country + '.json');
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for ( var i in data.data ) {
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fillUsage(usage, i, data.data[i]);
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}
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browserslist.usage[country] = usage;
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}
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};
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// Will be filled by Can I Use data below
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browserslist.data = { };
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browserslist.usage = {
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global: { },
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custom: null
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};
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// Default browsers query
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browserslist.defaults = [
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'> 1%',
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'last 2 versions',
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'Firefox ESR'
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];
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// What browsers will be used in `last n version` query
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browserslist.major = ['safari', 'opera', 'ios_saf', 'ie_mob', 'ie',
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'edge', 'firefox', 'chrome'];
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// Browser names aliases
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browserslist.aliases = {
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fx: 'firefox',
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ff: 'firefox',
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ios: 'ios_saf',
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explorer: 'ie',
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blackberry: 'bb',
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explorermobile: 'ie_mob',
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operamini: 'op_mini',
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operamobile: 'op_mob',
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chromeandroid: 'and_chr',
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firefoxandroid: 'and_ff',
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ucandroid: 'and_uc'
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};
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// Aliases to work with joined versions like `ios_saf 7.0-7.1`
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browserslist.versionAliases = { };
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// Get browser data by alias or case insensitive name
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browserslist.byName = function (name) {
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name = name.toLowerCase();
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name = browserslist.aliases[name] || name;
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return browserslist.data[name];
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};
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// Get browser data by alias or case insensitive name and throw error
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// on unknown browser
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browserslist.checkName = function (name) {
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var data = browserslist.byName(name);
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if ( !data ) error('Unknown browser ' + name);
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return data;
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};
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// Find config, read file and parse it
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browserslist.readConfig = function (from) {
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if ( from === false ) return false;
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if ( !fs.readFileSync || !fs.existsSync || !fs.statSync ) return false;
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if ( typeof from === 'undefined' ) from = '.';
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var dirs = path.resolve(from).split(path.sep);
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var config;
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while ( dirs.length ) {
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config = dirs.concat(['browserslist']).join(path.sep);
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if ( fs.existsSync(config) && fs.statSync(config).isFile() ) {
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return browserslist.parseConfig( fs.readFileSync(config) );
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}
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dirs.pop();
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}
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return false;
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};
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// Return browsers market coverage
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browserslist.coverage = function (browsers, country) {
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if (country && country !== 'global') {
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country = country.toUpperCase();
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loadCountryStatistics(country);
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} else {
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country = 'global'; // Default value
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}
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return browsers.reduce(function (all, i) {
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var usage = browserslist.usage[country][i];
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if (usage === undefined) {
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// Sometimes, Caniuse consolidates country usage data into a single
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// "version 0" entry. This is usually when there is only 1 version.
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usage = browserslist.usage[country][i.replace(/ [\d.]+$/, ' 0')];
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}
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return all + (usage || 0);
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}, 0);
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};
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// Return array of queries from config content
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browserslist.parseConfig = function (string) {
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return string.toString()
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.replace(/#[^\n]*/g, '')
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.split(/\n/)
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.map(function (i) {
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return i.trim();
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}).filter(function (i) {
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return i !== '';
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});
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};
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browserslist.queries = {
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lastVersions: {
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regexp: /^last\s+(\d+)\s+versions?$/i,
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select: function (versions) {
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var selected = [];
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browserslist.major.forEach(function (name) {
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var data = browserslist.byName(name);
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if ( !data ) return;
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var array = data.released.slice(-versions);
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array = array.map(function (v) {
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return data.name + ' ' + v;
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});
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selected = selected.concat(array);
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});
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return selected;
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}
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},
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lastByBrowser: {
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regexp: /^last\s+(\d+)\s+(\w+)\s+versions?$/i,
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select: function (versions, name) {
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var data = browserslist.checkName(name);
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return data.released.slice(-versions).map(function (v) {
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return data.name + ' ' + v;
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});
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}
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},
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globalStatistics: {
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regexp: /^>\s*(\d*\.?\d+)%$/,
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select: function (popularity) {
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popularity = parseFloat(popularity);
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var result = [];
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for ( var version in browserslist.usage.global ) {
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if ( browserslist.usage.global[version] > popularity ) {
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result.push(version);
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}
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}
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return result;
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}
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},
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customStatistics: {
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regexp: /^>\s*(\d*\.?\d+)%\s+in\s+my\s+stats$/,
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select: function (popularity) {
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popularity = parseFloat(popularity);
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var result = [];
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var usage = browserslist.usage.custom;
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if ( !usage ) {
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error('Custom usage statistics was not provided');
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}
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for ( var version in usage ) {
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if ( usage[version] > popularity ) {
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result.push(version);
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}
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}
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return result;
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}
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},
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countryStatistics: {
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regexp: /^>\s*(\d*\.?\d+)%\s+in\s+(\w\w)$/,
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select: function (popularity, country) {
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popularity = parseFloat(popularity);
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country = country.toUpperCase();
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var result = [];
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loadCountryStatistics(country);
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var usage = browserslist.usage[country];
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for ( var version in usage ) {
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if ( usage[version] > popularity ) {
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result.push(version);
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}
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}
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return result;
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}
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},
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range: {
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regexp: /^(\w+)\s+([\d\.]+)\s*-\s*([\d\.]+)$/i,
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select: function (name, from, to) {
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var data = browserslist.checkName(name);
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from = parseFloat(normalizeVersion(data, from) || from);
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to = parseFloat(normalizeVersion(data, to) || to);
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var filter = function (v) {
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var parsed = parseFloat(v);
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return parsed >= from && parsed <= to;
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};
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return data.released.filter(filter).map(function (v) {
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return data.name + ' ' + v;
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});
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}
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},
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versions: {
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regexp: /^(\w+)\s*(>=?|<=?)\s*([\d\.]+)$/,
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select: function (name, sign, version) {
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var data = browserslist.checkName(name);
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var alias = normalizeVersion(data, version);
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if ( alias ) {
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version = alias;
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}
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version = parseFloat(version);
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var filter;
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if ( sign === '>' ) {
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filter = function (v) {
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return parseFloat(v) > version;
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};
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} else if ( sign === '>=' ) {
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filter = function (v) {
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return parseFloat(v) >= version;
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};
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} else if ( sign === '<' ) {
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filter = function (v) {
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return parseFloat(v) < version;
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};
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} else if ( sign === '<=' ) {
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filter = function (v) {
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return parseFloat(v) <= version;
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};
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}
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return data.released.filter(filter).map(function (v) {
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return data.name + ' ' + v;
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});
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}
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},
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esr: {
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regexp: /^(firefox|ff|fx)\s+esr$/i,
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select: function () {
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return ['firefox 45'];
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}
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},
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opMini: {
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regexp: /(operamini|op_mini)\s+all/i,
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select: function () {
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return ['op_mini all'];
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}
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},
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direct: {
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regexp: /^(\w+)\s+(tp|[\d\.]+)$/i,
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select: function (name, version) {
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if ( /tp/i.test(version) ) version = 'TP';
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var data = browserslist.checkName(name);
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var alias = normalizeVersion(data, version);
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if ( alias ) {
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version = alias;
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} else {
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if ( version.indexOf('.') === -1 ) {
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alias = version + '.0';
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} else if ( /\.0$/.test(version) ) {
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alias = version.replace(/\.0$/, '');
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}
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alias = normalizeVersion(data, alias);
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if ( alias ) {
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version = alias;
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} else {
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error('Unknown version ' + version + ' of ' + name);
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}
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}
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return [data.name + ' ' + version];
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}
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},
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defaults: {
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regexp: /^defaults$/i,
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select: function () {
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return browserslist(browserslist.defaults);
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}
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}
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};
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// Get and convert Can I Use data
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(function () {
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for ( var name in caniuse ) {
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browserslist.data[name] = {
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name: name,
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versions: normalize(caniuse[name].versions),
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released: normalize(caniuse[name].versions.slice(0, -3))
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};
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fillUsage(browserslist.usage.global, name, caniuse[name].usage_global);
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browserslist.versionAliases[name] = { };
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for ( var i = 0; i < caniuse[name].versions.length; i++ ) {
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if ( !caniuse[name].versions[i] ) continue;
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var full = caniuse[name].versions[i];
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if ( full.indexOf('-') !== -1 ) {
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var interval = full.split('-');
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for ( var j = 0; j < interval.length; j++ ) {
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browserslist.versionAliases[name][interval[j]] = full;
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}
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}
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}
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}
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}());
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module.exports = browserslist;
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