HTLM5 new attribute-original (add source for partners), htlm5 new

HTLM5 new attribute-original (add source for partners), htlm5 new

1. <meta http-equiv = "Pragma" content = "no-cache"/>

// Disable page caching

 

2. <script defer src = "http://code.jquery.com/jquery-1.10.1.min.js" onload = "alert ('A')"> </script>

// Defer is to postpone the execution, that is, after the script file is downloaded, it will not execute 'A', but will be executed after all the web pages are loaded.

<Script async src = "http://code.jquery.com/jquery-migrate-1.2.1.min.js" onload = "alert ('B')"> </script>

// Async is an asynchronous execution, that is, after the script file is ready, 'B' is executed and the subsequent page is loaded.

 

3. <iframe seamless srcdoc = "

// Iframe isEmbedded page/framework-- Seamless indicates the padding and border of Embedded Web pages. After srcdoc appears, the content in src is ignored. sandbox is a security restriction:. do not submit Form B. disable JS script c. heterogeneous restrictions

Note: 1 and 2 are the header code.