Project: sass
Task (easy): Class SurveyPreview (file 'common/SurveyPreview.js', used by 'preview.js') constructor params are: formSelector (string), title (string). Method 'prependQuestion(question)' and 'appendQuestion(question)' are used to prepend/append a 'question.root' to the form (got by param 'formSelector'). Create a SurveyPreview instance with data parsed from 'localStorage.data' and all questions should use preview mode in which config panel should be hidden and question can not be editable. Save styles to 'common/SurveyPreview.scss' imported by 'common.scss'.