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334 lines
8.2 KiB
334 lines
8.2 KiB
3 years ago
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Sergey Melyukov @smelukov
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*/
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"use strict";
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const browserslist = require("browserslist");
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const path = require("path");
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/** @typedef {import("./target").ApiTargetProperties} ApiTargetProperties */
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/** @typedef {import("./target").EcmaTargetProperties} EcmaTargetProperties */
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/** @typedef {import("./target").PlatformTargetProperties} PlatformTargetProperties */
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// [[C:]/path/to/config][:env]
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const inputRx = /^(?:((?:[A-Z]:)?[/\\].*?))?(?::(.+?))?$/i;
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/**
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* @typedef {Object} BrowserslistHandlerConfig
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* @property {string=} configPath
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* @property {string=} env
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* @property {string=} query
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*/
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/**
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* @param {string} input input string
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* @param {string} context the context directory
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* @returns {BrowserslistHandlerConfig} config
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*/
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const parse = (input, context) => {
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if (!input) {
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return {};
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}
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if (path.isAbsolute(input)) {
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const [, configPath, env] = inputRx.exec(input) || [];
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return { configPath, env };
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}
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const config = browserslist.findConfig(context);
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if (config && Object.keys(config).includes(input)) {
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return { env: input };
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}
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return { query: input };
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};
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/**
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* @param {string} input input string
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* @param {string} context the context directory
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* @returns {string[] | undefined} selected browsers
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*/
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const load = (input, context) => {
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const { configPath, env, query } = parse(input, context);
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// if a query is specified, then use it, else
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// if a path to a config is specified then load it, else
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// find a nearest config
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const config = query
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? query
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: configPath
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? browserslist.loadConfig({
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config: configPath,
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env
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})
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: browserslist.loadConfig({ path: context, env });
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if (!config) return null;
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return browserslist(config);
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};
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/**
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* @param {string[]} browsers supported browsers list
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* @returns {EcmaTargetProperties & PlatformTargetProperties & ApiTargetProperties} target properties
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*/
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const resolve = browsers => {
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/**
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* Checks all against a version number
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* @param {Record<string, number | [number, number]>} versions first supported version
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* @returns {boolean} true if supports
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*/
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const rawChecker = versions => {
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return browsers.every(v => {
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const [name, parsedVersion] = v.split(" ");
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if (!name) return false;
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const requiredVersion = versions[name];
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if (!requiredVersion) return false;
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const [parsedMajor, parserMinor] =
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// safari TP supports all features for normal safari
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parsedVersion === "TP"
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? [Infinity, Infinity]
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: parsedVersion.split(".");
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if (typeof requiredVersion === "number") {
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return +parsedMajor >= requiredVersion;
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}
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return requiredVersion[0] === +parsedMajor
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? +parserMinor >= requiredVersion[1]
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: +parsedMajor > requiredVersion[0];
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});
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};
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const anyNode = browsers.some(b => /^node /.test(b));
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const anyBrowser = browsers.some(b => /^(?!node)/.test(b));
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const browserProperty = !anyBrowser ? false : anyNode ? null : true;
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const nodeProperty = !anyNode ? false : anyBrowser ? null : true;
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// Internet Explorer Mobile, Blackberry browser and Opera Mini are very old browsers, they do not support new features
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const es6DynamicImport = rawChecker({
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chrome: 63,
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and_chr: 63,
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edge: 79,
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firefox: 67,
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and_ff: 67,
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// ie: Not supported
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opera: 50,
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op_mob: 46,
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safari: [11, 1],
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ios_saf: [11, 3],
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samsung: [8, 2],
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android: 63,
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and_qq: [10, 4],
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// baidu: Not supported
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// and_uc: Not supported
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// kaios: Not supported
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node: [12, 17]
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});
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return {
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const: rawChecker({
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chrome: 49,
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and_chr: 49,
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edge: 12,
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// Prior to Firefox 13, <code>const</code> is implemented, but re-assignment is not failing.
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// Prior to Firefox 46, a <code>TypeError</code> was thrown on redeclaration instead of a <code>SyntaxError</code>.
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firefox: 36,
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and_ff: 36,
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// Not supported in for-in and for-of loops
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// ie: Not supported
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opera: 36,
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op_mob: 36,
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safari: [10, 0],
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ios_saf: [10, 0],
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// Before 5.0 supported correctly in strict mode, otherwise supported without block scope
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samsung: [5, 0],
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android: 37,
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and_qq: [10, 4],
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// Supported correctly in strict mode, otherwise supported without block scope
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// baidu: Not supported
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and_uc: [12, 12],
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kaios: [2, 5],
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node: [6, 0]
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}),
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arrowFunction: rawChecker({
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chrome: 45,
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and_chr: 45,
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edge: 12,
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// The initial implementation of arrow functions in Firefox made them automatically strict. This has been changed as of Firefox 24. The use of <code>'use strict';</code> is now required.
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// Prior to Firefox 39, a line terminator (<code>\\n</code>) was incorrectly allowed after arrow function arguments. This has been fixed to conform to the ES2015 specification and code like <code>() \\n => {}</code> will now throw a <code>SyntaxError</code> in this and later versions.
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firefox: 39,
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and_ff: 39,
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// ie: Not supported,
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opera: 32,
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op_mob: 32,
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safari: 10,
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ios_saf: 10,
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samsung: [5, 0],
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android: 45,
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and_qq: [10, 4],
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baidu: [7, 12],
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and_uc: [12, 12],
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kaios: [2, 5],
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node: [6, 0]
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}),
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forOf: rawChecker({
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chrome: 38,
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and_chr: 38,
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edge: 12,
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// Prior to Firefox 51, using the for...of loop construct with the const keyword threw a SyntaxError ("missing = in const declaration").
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firefox: 51,
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and_ff: 51,
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// ie: Not supported,
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opera: 25,
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op_mob: 25,
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safari: 7,
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ios_saf: 7,
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samsung: [3, 0],
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android: 38,
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// and_qq: Unknown support
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// baidu: Unknown support
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// and_uc: Unknown support
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// kaios: Unknown support
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node: [0, 12]
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}),
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destructuring: rawChecker({
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chrome: 49,
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and_chr: 49,
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edge: 14,
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firefox: 41,
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and_ff: 41,
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// ie: Not supported,
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opera: 36,
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op_mob: 36,
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safari: 8,
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ios_saf: 8,
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samsung: [5, 0],
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android: 49,
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// and_qq: Unknown support
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// baidu: Unknown support
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// and_uc: Unknown support
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// kaios: Unknown support
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node: [6, 0]
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}),
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bigIntLiteral: rawChecker({
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chrome: 67,
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and_chr: 67,
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edge: 79,
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firefox: 68,
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and_ff: 68,
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// ie: Not supported,
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opera: 54,
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op_mob: 48,
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safari: 14,
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ios_saf: 14,
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samsung: [9, 2],
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android: 67,
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// and_qq: Not supported
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// baidu: Not supported
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// and_uc: Not supported
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// kaios: Not supported
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node: [10, 4]
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}),
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// Support syntax `import` and `export` and no limitations and bugs on Node.js
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// Not include `export * as namespace`
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module: rawChecker({
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chrome: 61,
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and_chr: 61,
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edge: 16,
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firefox: 60,
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and_ff: 60,
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// ie: Not supported,
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opera: 48,
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op_mob: 45,
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safari: [10, 1],
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ios_saf: [10, 3],
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samsung: [8, 0],
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android: 61,
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and_qq: [10, 4],
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// baidu: Not supported
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// and_uc: Not supported
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// kaios: Not supported
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node: [12, 17]
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}),
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dynamicImport: es6DynamicImport,
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dynamicImportInWorker: es6DynamicImport && !anyNode,
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// browserslist does not have info about globalThis
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// so this is based on mdn-browser-compat-data
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globalThis: rawChecker({
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chrome: 71,
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and_chr: 71,
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edge: 79,
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firefox: 65,
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and_ff: 65,
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// ie: Not supported,
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opera: 58,
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op_mob: 50,
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safari: [12, 1],
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ios_saf: [12, 2],
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samsung: [10, 1],
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android: 71,
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// and_qq: Unknown support
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// baidu: Unknown support
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// and_uc: Unknown support
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// kaios: Unknown support
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node: 12
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}),
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optionalChaining: rawChecker({
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chrome: 80,
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and_chr: 80,
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edge: 80,
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firefox: 74,
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and_ff: 79,
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// ie: Not supported,
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opera: 67,
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op_mob: 64,
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safari: [13, 1],
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ios_saf: [13, 4],
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samsung: 13,
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android: 80,
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// and_qq: Not supported
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// baidu: Not supported
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// and_uc: Not supported
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// kaios: Not supported
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node: 14
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}),
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templateLiteral: rawChecker({
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chrome: 41,
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and_chr: 41,
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edge: 13,
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firefox: 34,
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and_ff: 34,
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// ie: Not supported,
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opera: 29,
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op_mob: 64,
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safari: [9, 1],
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ios_saf: 9,
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samsung: 4,
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android: 41,
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and_qq: [10, 4],
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baidu: [7, 12],
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and_uc: [12, 12],
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kaios: [2, 5],
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node: 4
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}),
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browser: browserProperty,
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electron: false,
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node: nodeProperty,
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nwjs: false,
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web: browserProperty,
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webworker: false,
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document: browserProperty,
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fetchWasm: browserProperty,
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global: nodeProperty,
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importScripts: false,
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importScriptsInWorker: true,
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nodeBuiltins: nodeProperty,
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require: nodeProperty
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};
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};
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module.exports = {
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resolve,
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load
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};
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