Function insertRules

code/styling/public/app.js:20349–20377

(id, cssRules, name)

  };

  var insertRules = function insertRules(id, cssRules, name) {
    var marker = insertMarker(id);
    var sheet = sheetForTag(el);
    var insertIndex = addUpUntilIndex(sizes, marker);

    var injectedRules = 0;
    var importRules = [];
    var cssRulesSize = cssRules.length;

    for (var i = 0; i < cssRulesSize; i += 1) {
      var cssRule = cssRules[i];
      var mayHaveImport = extractImport; /* @import rules are reordered to appear first */
      if (mayHaveImport && cssRule.indexOf('@import') !== -1) {
        importRules.push(cssRule);
      } else if (safeInsertRule(sheet, cssRule, insertIndex + injectedRules)) {
        mayHaveImport = false;
        injectedRules += 1;
      }
    }

    if (extractImport && importRules.length > 0) {
      usedImportRuleTag = true;
      // $FlowFixMe
      getImportRuleTag().insertRules(id + '-import', importRules);
    }

    sizes[marker] += injectedRules; /* add up no of injected rules */
    addNameForId(names, id, name);
  };

  var removeRules = function removeRules(id) {
    var marker = markers[id];