<apex:page showHeader="false" sidebar="false" standardStylesheets="false" docType="html-5.0" manifest="/apex/CacheManifest"> <header> <h1>Congratulations!</h1> </header> <article> <p>This page looks almost like HTML5!</p> </article> </apex:page>
<html manifest="/apex/CacheManifest">
The manifest attribute is available on the <apex:page> tag for Visualforce pages set to API version 28.0 or higher, and also requires that the applyHtmlTag is set to true (the default).
<apex:page contentType="text/cache-manifest" applyHtmlTag="false" standardStylesheets="false" showHeader="false"> CACHE MANIFEST index.html stylesheet.css images/logo.png scripts/main.js </apex:page>