pretty-lights/server/extract-critical.js

CSS-in-JS with a reliable API

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) { symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); } keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

var getMatches = function getMatches(regEx, html) {
  var ids = {};
  var match; // eslint-disable-next-line no-cond-assign

  while ((match = regEx.exec(html)) !== null) {
    // $FlowFixMe
    if (ids[match[1]] === undefined) {
      if (match[1].indexOf(' ') > 0) {
        console.log('space', match[1]);
        match[1].split(' ').forEach(function (id) {
          ids[id] = true;
        });
      } else {
        // $FlowFixMe
        ids[match[1]] = true;
      }
    }
  }

  return ids;
};

var createExtractCritical = function createExtractCritical(cache) {
  return function (html) {
    // parse out globals from <Global />
    var GLOBAL_RGX = new RegExp("data-global-".concat(cache.key, "=\"([a-zA-Z0-9-_ ]+)\""), 'gm');
    var GLOBAL_STYLE_TAG = new RegExp("<style data-global-".concat(cache.key, "=\"[^\"]+\"[^>]*></style>"), 'gm'); // parse out animation ids from css

    var ANIM_RGX = new RegExp("animation-([a-zA-Z0-9-_]+)", 'gm'); // parse out ids from html
    // reconstruct css/rules/cache to pass

    var RGX = new RegExp("".concat(cache.key, "-([a-zA-Z0-9-_]+)"), 'gm');
    var o = {
      html: html,
      ids: [],
      css: ''
    };

    var ids = _objectSpread(_objectSpread({}, getMatches(GLOBAL_RGX, html)), getMatches(RGX, html));

    o.ids = o.ids.concat( // add global styles to the front
    Object.keys(cache.global).map(function (id) {
      o.css += cache.inserted[id];
      return id;
    }), // add styles matching selectors
    Object.keys(cache.inserted).filter(function (id) {
      if (ids[id] !== undefined && cache.global[id] === undefined && cache.inserted[id] !== true) {
        o.css += cache.inserted[id];
        return true;
      }

      return false;
    })); // include identified keyframe animations at the top

    var animIds = getMatches(ANIM_RGX, o.css);
    var animCss = '';
    o.ids = o.ids.concat(Object.keys(animIds).map(function (id) {
      if (cache.inserted[id]) {
        animCss += cache.inserted[id];
      }

      return id;
    }));
    o.css = animCss + o.css; // remove global component style placeholders

    o.html = o.html.replace(GLOBAL_STYLE_TAG, '');
    return o;
  };
};

var _default = createExtractCritical;
exports["default"] = _default;