postcss-critical-css/dist/atRule.js

Generate critical CSS using PostCSS

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

exports.getCriticalFromAtRule = getCriticalFromAtRule;

var _postcss = require("postcss");

var _postcss2 = _interopRequireDefault(_postcss);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Get critical CSS from an at-rule.
 *
 * @param {Object} args Function args. See flow type alias.
 */
function getCriticalFromAtRule(args) {
  var result = {};
  var options = _extends({
    defaultDest: "critical.css",
    css: _postcss2.default.root()
  }, args);

  options.css.walkAtRules("critical", function (atRule) {
    var name = atRule.params ? atRule.params : options.defaultDest;
    // If rule has no nodes, all the nodes of the parent will be critical.
    var rule = atRule;
    if (!atRule.nodes) {
      rule = atRule.root();
    }
    rule.clone().each(function (node) {
      if (node.name !== "critical") {
        result[name] = result[name] ? result[name].append(node) : _postcss2.default.root().append(node);
      }
    });
  });
  return result;
}