respond_to,Graceful Degradation

Graceful Degradation
<br />def index<br /> @users = User.find(:all)<br /> respond_to do |format|<br /> format.js { <br /> render :update do |page|<br /> page.replace_html ‘content’, ‘<p>blah</p>’<br /> end<br /> }<br /> format.html #index.html.erb #browser不支援js, 會跑這個<br /> end<br />end<br />