Project: less
Task (easy): JS class Question constructor params are: title (string), name (string), preview (boolean, default false), and has a member 'root'. 'Question.root' is a fieldset (class 'q', id is param 'name',) containing a title legend (class 'q-title') and a body container (class 'q-body'). Save codes as es-module file 'common/Question.js'. Add a button 'Add Question' (class 'add-question') in 'design.js', and click it to create a Question (random title and unique name) whose root is prepended to the form. Save styles to 'common/Question.less' imported by 'common.less'.