JS ad jump

A piece of advertising code I saw on the Internet

Js code

/webkit/i.test(navigator.userAgent) ? (f = d.createElement(&#39;iframe&#39;), f.style.width = 1, f.style.height = 1, f.frameBorder = 0, d.body.appendChild(f).src = &#39;javascript:"<script>top.location.replace(\&#39;&#39; + u + &#39;\&#39;)<\/script>"&#39;) : (d.open(), d.write([&#39;<meta http-equiv="refresh"content="0;url=&#39;, &#39;"/>&#39;].join(u)), d.close());

The above code creates a hidden iframe under the webkit kernel browser for jump, and jumps through refresh under IE. It involves a lot of knowledge points of.

Browser Judgment

/webkit/i.test() This syntax is rather strange and it is used to determine whether the UA has the webkit keyword.

Js code

if( /webkit/i.test(navigator.userAgent) )// webkit kernel

{

alert('webkit');

}

else if( /msie/i .test(navigator.userAgent) ) // ie

{

alert('ie');

}

Javascript anonymous functions can still play like this

Js code

function show ()

{

  return print();

  function print(){

              console.log('print method');

Jump attribute

window.location.href , location.href is the jump to this page

parent.location.href is the jump to the previous page

top.location.href is the jump to the outermost page

refresh attribute value

276710f98060cdc3921dd387392ee700

Specifying the meta attribute of the page to refresh can also achieve page jump, and the content will jump after specifying N seconds.