Support devicePixelRatio on the front-end
Support devicePixelRatio on the front-end

ZainRizvi/wordcloud2.js,alex2wong/wordcloud2.js,alex2wong/wordcloud2.js,ZainRizvi/wordcloud2.js,timdream/wordcloud2.js,timdream/wordcloud2.js,ZainRizvi/wordcloud2.js,alex2wong/wordcloud2.js,timdream/wordcloud2.js