JezK
Edit File: browserslist
#!/usr/bin/env node var updateDb = require('update-browserslist-db') var fs = require('fs') var browserslist = require('./') var pkg = require('./package.json') var args = process.argv.slice(2) var USAGE = 'Usage:\n' + ' npx browserslist\n' + ' npx browserslist "QUERIES"\n' + ' npx browserslist --json "QUERIES"\n' + ' npx browserslist --config="path/to/browserlist/file"\n' + ' npx browserslist --coverage "QUERIES"\n' + ' npx browserslist --coverage=US "QUERIES"\n' + ' npx browserslist --coverage=US,RU,global "QUERIES"\n' + ' npx browserslist --env="environment name defined in config"\n' + ' npx browserslist --stats="path/to/browserlist/stats/file"\n' + ' npx browserslist --mobile-to-desktop\n' + ' npx browserslist --ignore-unknown-versions\n' function isArg(arg) { return args.some(function (str) { return str === arg || str.indexOf(arg + '=') === 0 }) } function error(msg) { process.stderr.write('browserslist: ' + msg + '\n') process.exit(1) } if (isArg('--help') || isArg('-h')) { process.stdout.write(pkg.description + '.\n\n' + USAGE + '\n') } else if (isArg('--version') || isArg('-v')) { process.stdout.write('browserslist ' + pkg.version + '\n') } else if (isArg('--update-db')) { /* c8 ignore next 3 */ updateDb(function (str) { process.stdout.write(str) }) } else { var mode = 'browsers' var opts = {} var queries var areas for (var i = 0; i < args.length; i++) { if (args[i][0] !== '-') { queries = args[i].replace(/^["']|["']$/g, '') continue } var arg = args[i].split('=') var name = arg[0] var value = arg[1] if (value) value = value.replace(/^["']|["']$/g, '') if (name === '--config' || name === '-b') { opts.config = value } else if (name === '--env' || name === '-e') { opts.env = value } else if (name === '--stats' || name === '-s') { opts.stats = value } else if (name === '--coverage' || name === '-c') { if (mode !== 'json') mode = 'coverage' if (value) { areas = value.split(',') } else { areas = ['global'] } } else if (name === '--json') { mode = 'json' } else if (name === '--mobile-to-desktop') { /* c8 ignore next */ opts.mobileToDesktop = true } else if (name === '--ignore-unknown-versions') { /* c8 ignore next */ opts.ignoreUnknownVersions = true } else { error('Unknown arguments ' + args[i] + '.\n\n' + USAGE) } } var browsers try { browsers = browserslist(queries, opts) } catch (e) { if (e.name === 'BrowserslistError') { error(e.message) } /* c8 ignore start */ else { throw e } /* c8 ignore end */ } var coverage if (mode === 'browsers') { browsers.forEach(function (browser) { process.stdout.write(browser + '\n') }) } else if (areas) { coverage = areas.map(function (area) { var stats if (area !== 'global') { stats = area } else if (opts.stats) { stats = JSON.parse(fs.readFileSync(opts.stats)) } var result = browserslist.coverage(browsers, stats) var round = Math.round(result * 100) / 100.0 return [area, round] }) if (mode === 'coverage') { var prefix = 'These browsers account for ' process.stdout.write(prefix) coverage.forEach(function (data, index) { var area = data[0] var round = data[1] var end = 'globally' if (area && area !== 'global') { end = 'in the ' + area.toUpperCase() } else if (opts.stats) { end = 'in custom statistics' } if (index !== 0) { process.stdout.write(prefix.replace(/./g, ' ')) } process.stdout.write(round + '% of all users ' + end + '\n') }) } } if (mode === 'json') { var data = { browsers: browsers } if (coverage) { data.coverage = coverage.reduce(function (object, j) { object[j[0]] = j[1] return object }, {}) } process.stdout.write(JSON.stringify(data, null, ' ') + '\n') } }