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node_modules/autoprefixer/lib/autoprefixer.js

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+"use strict";
+
+var browserslist = require('browserslist');
+
+var colorette = require('colorette');
+
+var postcss = require('postcss');
+
+var agents = require('caniuse-lite').agents;
+
+var Browsers = require('./browsers');
+
+var Prefixes = require('./prefixes');
+
+var data = require('../data/prefixes');
+
+var info = require('./info');
+
+var WARNING = '\n' + '  Replace Autoprefixer `browsers` option to Browserslist config.\n' + '  Use `browserslist` key in `package.json` or `.browserslistrc` file.\n' + '\n' + '  Using `browsers` option can cause errors. Browserslist config \n' + '  can be used for Babel, Autoprefixer, postcss-normalize and other tools.\n' + '\n' + '  If you really need to use option, rename it to `overrideBrowserslist`.\n' + '\n' + '  Learn more at:\n' + '  https://github.com/browserslist/browserslist#readme\n' + '  https://twitter.com/browserslist\n' + '\n';
+
+function isPlainObject(obj) {
+  return Object.prototype.toString.apply(obj) === '[object Object]';
+}
+
+var cache = {};
+
+function timeCapsule(result, prefixes) {
+  if (prefixes.browsers.selected.length === 0) {
+    return;
+  }
+
+  if (prefixes.add.selectors.length > 0) {
+    return;
+  }
+
+  if (Object.keys(prefixes.add).length > 2) {
+    return;
+  }
+  /* istanbul ignore next */
+
+
+  result.warn('Greetings, time traveller. ' + 'We are in the golden age of prefix-less CSS, ' + 'where Autoprefixer is no longer needed for your stylesheet.');
+}
+
+module.exports = postcss.plugin('autoprefixer', function () {
+  for (var _len = arguments.length, reqs = new Array(_len), _key = 0; _key < _len; _key++) {
+    reqs[_key] = arguments[_key];
+  }
+
+  var options;
+
+  if (reqs.length === 1 && isPlainObject(reqs[0])) {
+    options = reqs[0];
+    reqs = undefined;
+  } else if (reqs.length === 0 || reqs.length === 1 && !reqs[0]) {
+    reqs = undefined;
+  } else if (reqs.length <= 2 && (Array.isArray(reqs[0]) || !reqs[0])) {
+    options = reqs[1];
+    reqs = reqs[0];
+  } else if (typeof reqs[reqs.length - 1] === 'object') {
+    options = reqs.pop();
+  }
+
+  if (!options) {
+    options = {};
+  }
+
+  if (options.browser) {
+    throw new Error('Change `browser` option to `overrideBrowserslist` in Autoprefixer');
+  } else if (options.browserslist) {
+    throw new Error('Change `browserslist` option to `overrideBrowserslist` in Autoprefixer');
+  }
+
+  if (options.overrideBrowserslist) {
+    reqs = options.overrideBrowserslist;
+  } else if (options.browsers) {
+    if (typeof console !== 'undefined' && console.warn) {
+      if (colorette.red) {
+        console.warn(colorette.red(WARNING.replace(/`[^`]+`/g, function (i) {
+          return colorette.yellow(i.slice(1, -1));
+        })));
+      } else {
+        console.warn(WARNING);
+      }
+    }
+
+    reqs = options.browsers;
+  }
+
+  var brwlstOpts = {
+    ignoreUnknownVersions: options.ignoreUnknownVersions,
+    stats: options.stats,
+    env: options.env
+  };
+
+  function loadPrefixes(opts) {
+    var d = module.exports.data;
+    var browsers = new Browsers(d.browsers, reqs, opts, brwlstOpts);
+    var key = browsers.selected.join(', ') + JSON.stringify(options);
+
+    if (!cache[key]) {
+      cache[key] = new Prefixes(d.prefixes, browsers, options);
+    }
+
+    return cache[key];
+  }
+
+  function plugin(css, result) {
+    var prefixes = loadPrefixes({
+      from: css.source && css.source.input.file,
+      env: options.env
+    });
+    timeCapsule(result, prefixes);
+
+    if (options.remove !== false) {
+      prefixes.processor.remove(css, result);
+    }
+
+    if (options.add !== false) {
+      prefixes.processor.add(css, result);
+    }
+  }
+
+  plugin.options = options;
+  plugin.browsers = reqs;
+
+  plugin.info = function (opts) {
+    opts = opts || {};
+    opts.from = opts.from || process.cwd();
+    return info(loadPrefixes(opts));
+  };
+
+  return plugin;
+});
+/**
+ * Autoprefixer data
+ */
+
+module.exports.data = {
+  browsers: agents,
+  prefixes: data
+};
+/**
+ * Autoprefixer default browsers
+ */
+
+module.exports.defaults = browserslist.defaults;
+/**
+ * Inspect with default Autoprefixer
+ */
+
+module.exports.info = function () {
+  return module.exports().info();
+};