Function testAndSet

src/main.js:435–440

(choice, beforeState)

                scope.displayElements.html.addClass("ta-html ta-editor " + scope.classes.htmlEditor);

                var testAndSet = function(choice, beforeState) {
                    /* istanbul ignore next: this is only here because of a bug in rangy where rangy.saveSelection() has cleared the state */
                    if (beforeState !== $document[0].queryCommandState(choice)) {
                        $document[0].execCommand(choice, false, null);
                    }
                };
                // used in the toolbar actions
                scope._actionRunning = false;
                var _savedSelection = false;