| 1 | /*
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| 2 | MIT License http://www.opensource.org/licenses/mit-license.php
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| 3 | Author Sergey Melyukov @smelukov
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| 4 | */
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| 5 |
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| 6 | "use strict";
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| 7 |
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| 8 | const path = require("path");
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| 9 | const browserslist = require("browserslist");
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| 10 |
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| 11 | /** @typedef {import("./target").ApiTargetProperties} ApiTargetProperties */
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| 12 | /** @typedef {import("./target").EcmaTargetProperties} EcmaTargetProperties */
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| 13 | /** @typedef {import("./target").PlatformTargetProperties} PlatformTargetProperties */
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| 14 |
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| 15 | // [[C:]/path/to/config][:env]
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| 16 | const inputRx = /^(?:((?:[A-Z]:)?[/\\].*?))?(?::(.+?))?$/i;
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| 17 |
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| 18 | /**
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| 19 | * Returns selected browsers.
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| 20 | * @param {string | null | undefined} input input string
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| 21 | * @param {string} context the context directory
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| 22 | * @returns {string[] | undefined} selected browsers
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| 23 | */
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| 24 | const load = (input, context) => {
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| 25 | // browserslist:path-to-config
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| 26 | // browserslist:path-to-config:env
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| 27 | if (input && path.isAbsolute(input)) {
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| 28 | const [, configPath, env] = inputRx.exec(input) || [];
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| 29 |
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| 30 | const config = browserslist.loadConfig({
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| 31 | config: configPath,
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| 32 | env
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| 33 | });
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| 34 |
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| 35 | return browserslist(config, { env });
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| 36 | }
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| 37 |
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| 38 | const env = input || undefined;
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| 39 |
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| 40 | const config = browserslist.loadConfig({
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| 41 | path: context,
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| 42 | env
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| 43 | });
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| 44 |
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| 45 | // browserslist
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| 46 | // browserslist:env
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| 47 | if (config) {
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| 48 | try {
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| 49 | return browserslist(config, { env, throwOnMissing: true });
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| 50 | } catch (_err) {
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| 51 | // Nothing, no `env` was found in browserslist, maybe input is `queries`
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| 52 | }
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| 53 | }
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| 54 |
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| 55 | // browserslist:query
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| 56 | if (env) {
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| 57 | return browserslist(env);
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| 58 | }
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| 59 | };
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| 60 |
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| 61 | /**
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| 62 | * Returns target properties.
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| 63 | * @param {string[]} browsers supported browsers list
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| 64 | * @returns {EcmaTargetProperties & PlatformTargetProperties & ApiTargetProperties} target properties
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| 65 | */
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| 66 | const resolve = (browsers) => {
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| 67 | /**
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| 68 | * Checks all against a version number
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| 69 | * @param {Record<string, number | [number, number]>} versions first supported version
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| 70 | * @returns {boolean} true if supports
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| 71 | */
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| 72 | const rawChecker = (versions) =>
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| 73 | browsers.every((v) => {
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| 74 | const [name, parsedVersion] = v.split(" ");
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| 75 | if (!name) return false;
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| 76 | const requiredVersion = versions[name];
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| 77 | if (!requiredVersion) return false;
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| 78 | const [parsedMajor, parserMinor] =
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| 79 | // safari TP supports all features for normal safari
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| 80 | parsedVersion === "TP"
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| 81 | ? [Infinity, Infinity]
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| 82 | : parsedVersion.includes("-")
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| 83 | ? parsedVersion.split("-")[0].split(".")
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| 84 | : parsedVersion.split(".");
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| 85 | if (typeof requiredVersion === "number") {
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| 86 | return Number(parsedMajor) >= requiredVersion;
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| 87 | }
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| 88 | return requiredVersion[0] === Number(parsedMajor)
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| 89 | ? Number(parserMinor) >= requiredVersion[1]
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| 90 | : Number(parsedMajor) > requiredVersion[0];
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| 91 | });
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| 92 | const anyNode = browsers.some((b) => b.startsWith("node "));
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| 93 | const anyBrowser = browsers.some((b) => /^(?!node)/.test(b));
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| 94 | const browserProperty = !anyBrowser ? false : anyNode ? null : true;
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| 95 | const nodeProperty = !anyNode ? false : anyBrowser ? null : true;
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| 96 |
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| 97 | return {
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| 98 | /* eslint-disable camelcase */
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| 99 | const: rawChecker({
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| 100 | chrome: 49,
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| 101 | and_chr: 49,
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| 102 | edge: 12,
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| 103 | // Prior to Firefox 13, <code>const</code> is implemented, but re-assignment is not failing.
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| 104 | // Prior to Firefox 46, a <code>TypeError</code> was thrown on redeclaration instead of a <code>SyntaxError</code>.
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| 105 | firefox: 36,
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| 106 | and_ff: 36,
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| 107 | // Not supported in for-in and for-of loops
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| 108 | // ie: Not supported
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| 109 | opera: 36,
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| 110 | op_mob: 36,
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| 111 | safari: [10, 0],
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| 112 | ios_saf: [10, 0],
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| 113 | // Before 5.0 supported correctly in strict mode, otherwise supported without block scope
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| 114 | samsung: [5, 0],
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| 115 | android: 37,
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| 116 | and_qq: [10, 4],
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| 117 | // Supported correctly in strict mode, otherwise supported without block scope
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| 118 | baidu: [13, 18],
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| 119 | and_uc: [12, 12],
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| 120 | kaios: [2, 5],
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| 121 | node: [6, 0]
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| 122 | }),
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| 123 | methodShorthand: rawChecker({
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| 124 | chrome: 47,
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| 125 | and_chr: 47,
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| 126 | edge: 12,
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| 127 | firefox: 34,
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| 128 | and_ff: 34,
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| 129 | // ie: Not supported,
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| 130 | opera: 34,
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| 131 | op_mob: 34,
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| 132 | safari: 9,
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| 133 | ios_saf: 9,
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| 134 | samsung: 5,
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| 135 | android: 47,
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| 136 | // baidu: Not tracked,
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| 137 | and_qq: [14, 9],
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| 138 | and_uc: [15, 5],
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| 139 | kaios: [2, 5],
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| 140 | node: [4, 9]
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| 141 | }),
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| 142 | arrowFunction: rawChecker({
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| 143 | chrome: 45,
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| 144 | and_chr: 45,
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| 145 | edge: 12,
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| 146 | // 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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| 147 | // 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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| 148 | firefox: 39,
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| 149 | and_ff: 39,
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| 150 | // ie: Not supported,
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| 151 | opera: 32,
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| 152 | op_mob: 32,
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| 153 | safari: 10,
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| 154 | ios_saf: 10,
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| 155 | samsung: [5, 0],
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| 156 | android: 45,
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| 157 | and_qq: [10, 4],
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| 158 | baidu: [7, 12],
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| 159 | and_uc: [12, 12],
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| 160 | kaios: [2, 5],
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| 161 | node: [6, 0]
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| 162 | }),
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| 163 | forOf: rawChecker({
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| 164 | chrome: 38,
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| 165 | and_chr: 38,
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| 166 | edge: 12,
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| 167 | // 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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| 168 | firefox: 51,
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| 169 | and_ff: 51,
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| 170 | // ie: Not supported,
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| 171 | opera: 25,
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| 172 | op_mob: 25,
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| 173 | safari: 7,
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| 174 | ios_saf: 7,
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| 175 | samsung: [3, 0],
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| 176 | android: 38,
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| 177 | and_qq: [10, 4],
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| 178 | // baidu: Unknown support
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| 179 | and_uc: [12, 12],
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| 180 | kaios: [3, 0],
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| 181 | node: [0, 12]
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| 182 | }),
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| 183 | destructuring: rawChecker({
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| 184 | chrome: 49,
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| 185 | and_chr: 49,
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| 186 | edge: 14,
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| 187 | firefox: 41,
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| 188 | and_ff: 41,
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| 189 | // ie: Not supported,
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| 190 | opera: 36,
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| 191 | op_mob: 36,
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| 192 | safari: 8,
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| 193 | ios_saf: 8,
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| 194 | samsung: [5, 0],
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| 195 | android: 49,
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| 196 | and_qq: [10, 4],
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| 197 | // baidu: Unknown support
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| 198 | and_uc: [12, 12],
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| 199 | kaios: [2, 5],
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| 200 | node: [6, 0]
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| 201 | }),
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| 202 | bigIntLiteral: rawChecker({
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| 203 | chrome: 67,
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| 204 | and_chr: 67,
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| 205 | edge: 79,
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| 206 | firefox: 68,
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| 207 | and_ff: 68,
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| 208 | // ie: Not supported,
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| 209 | opera: 54,
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| 210 | op_mob: 48,
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| 211 | safari: 14,
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| 212 | ios_saf: 14,
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| 213 | samsung: [9, 2],
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| 214 | android: 67,
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| 215 | and_qq: [13, 1],
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| 216 | baidu: [13, 18],
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| 217 | and_uc: [15, 5],
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| 218 | kaios: [3, 0],
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| 219 | node: [10, 4]
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| 220 | }),
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| 221 | // Support syntax `import` and `export` and no limitations and bugs on Node.js
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| 222 | // Not include `export * as namespace`
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| 223 | module: rawChecker({
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| 224 | chrome: 61,
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| 225 | and_chr: 61,
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| 226 | edge: 16,
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| 227 | firefox: 60,
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| 228 | and_ff: 60,
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| 229 | // ie: Not supported,
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| 230 | opera: 48,
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| 231 | op_mob: 45,
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| 232 | safari: [10, 1],
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| 233 | ios_saf: [10, 3],
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| 234 | samsung: [8, 0],
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| 235 | android: 61,
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| 236 | and_qq: [10, 4],
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| 237 | baidu: [13, 18],
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| 238 | and_uc: [15, 5],
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| 239 | kaios: [3, 0],
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| 240 | node: [12, 17]
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| 241 | }),
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| 242 | dynamicImport: rawChecker({
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| 243 | chrome: 63,
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| 244 | and_chr: 63,
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| 245 | edge: 79,
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| 246 | firefox: 67,
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| 247 | and_ff: 67,
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| 248 | // ie: Not supported
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| 249 | opera: 50,
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| 250 | op_mob: 46,
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| 251 | safari: [11, 1],
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| 252 | ios_saf: [11, 3],
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| 253 | samsung: [8, 2],
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| 254 | android: 63,
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| 255 | and_qq: [10, 4],
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| 256 | baidu: [13, 18],
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| 257 | and_uc: [15, 5],
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| 258 | kaios: [3, 0],
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| 259 | node: [12, 17]
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| 260 | }),
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| 261 | dynamicImportInWorker: rawChecker({
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| 262 | chrome: 80,
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| 263 | and_chr: 80,
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| 264 | edge: 80,
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| 265 | firefox: 114,
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| 266 | and_ff: 114,
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| 267 | // ie: Not supported
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| 268 | opera: 67,
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| 269 | op_mob: 57,
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| 270 | safari: [15, 0],
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| 271 | ios_saf: [15, 0],
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| 272 | samsung: [13, 0],
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| 273 | android: 80,
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| 274 | and_qq: [10, 4],
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| 275 | baidu: [13, 18],
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| 276 | and_uc: [15, 5],
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| 277 | kaios: [3, 0],
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| 278 | node: [12, 17]
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| 279 | }),
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| 280 | // browserslist does not have info about globalThis
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| 281 | // so this is based on mdn-browser-compat-data
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| 282 | globalThis: rawChecker({
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| 283 | chrome: 71,
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| 284 | and_chr: 71,
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| 285 | edge: 79,
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| 286 | firefox: 65,
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| 287 | and_ff: 65,
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| 288 | // ie: Not supported,
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| 289 | opera: 58,
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| 290 | op_mob: 50,
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| 291 | safari: [12, 1],
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| 292 | ios_saf: [12, 2],
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| 293 | samsung: [10, 1],
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| 294 | android: 71,
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| 295 | and_qq: [13, 1],
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| 296 | // baidu: Unknown support
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| 297 | and_uc: [15, 5],
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| 298 | kaios: [3, 0],
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| 299 | node: 12
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| 300 | }),
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| 301 | optionalChaining: rawChecker({
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| 302 | chrome: 80,
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| 303 | and_chr: 80,
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| 304 | edge: 80,
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| 305 | firefox: 74,
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| 306 | and_ff: 79,
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| 307 | // ie: Not supported,
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| 308 | opera: 67,
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| 309 | op_mob: 64,
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| 310 | safari: [13, 1],
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| 311 | ios_saf: [13, 4],
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| 312 | samsung: 13,
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| 313 | android: 80,
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| 314 | and_qq: [13, 1],
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| 315 | // baidu: Not supported
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| 316 | and_uc: [15, 5],
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| 317 | kaios: [3, 0],
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| 318 | node: 14
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| 319 | }),
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| 320 | templateLiteral: rawChecker({
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| 321 | chrome: 41,
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| 322 | and_chr: 41,
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| 323 | edge: 13,
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| 324 | firefox: 34,
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| 325 | and_ff: 34,
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| 326 | // ie: Not supported,
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| 327 | opera: 29,
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| 328 | op_mob: 64,
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| 329 | safari: [9, 1],
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| 330 | ios_saf: 9,
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| 331 | samsung: 4,
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| 332 | android: 41,
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| 333 | and_qq: [10, 4],
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| 334 | baidu: [7, 12],
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| 335 | and_uc: [12, 12],
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| 336 | kaios: [2, 5],
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| 337 | node: 4
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| 338 | }),
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| 339 | asyncFunction: rawChecker({
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| 340 | chrome: 55,
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| 341 | and_chr: 55,
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| 342 | edge: 15,
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| 343 | firefox: 52,
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| 344 | and_ff: 52,
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| 345 | // ie: Not supported,
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| 346 | opera: 42,
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| 347 | op_mob: 42,
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| 348 | safari: 11,
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| 349 | ios_saf: 11,
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| 350 | samsung: [6, 2],
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| 351 | android: 55,
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| 352 | and_qq: [10, 4],
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| 353 | baidu: [13, 18],
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| 354 | and_uc: [12, 12],
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| 355 | kaios: 3,
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| 356 | node: [7, 6]
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| 357 | }),
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| 358 | /* eslint-enable camelcase */
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| 359 | browser: browserProperty,
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| 360 | electron: false,
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| 361 | node: nodeProperty,
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| 362 | nwjs: false,
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| 363 | web: browserProperty,
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| 364 | webworker: false,
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| 365 |
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| 366 | document: browserProperty,
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| 367 | fetchWasm: browserProperty,
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| 368 | global: nodeProperty,
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| 369 | importScripts: false,
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| 370 | importScriptsInWorker: Boolean(browserProperty),
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| 371 | nodeBuiltins: nodeProperty,
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| 372 | nodePrefixForCoreModules:
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| 373 | nodeProperty &&
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| 374 | !browsers.some((b) => b.startsWith("node 15")) &&
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| 375 | rawChecker({
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| 376 | node: [14, 18]
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| 377 | }),
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| 378 | importMetaDirnameAndFilename:
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| 379 | nodeProperty &&
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| 380 | rawChecker({
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| 381 | node: [22, 16]
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| 382 | }),
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| 383 | require: nodeProperty
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| 384 | };
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| 385 | };
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| 386 |
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| 387 | module.exports = {
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| 388 | load,
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| 389 | resolve
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| 390 | };
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