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cookies in java script

cookies in java script
 a cookie  is a text file  in client system  used to maintain sum information  stores in clients ram or hard disk based on the cookie type . cookie information we can access from any page with in the application
cookie is main divided in two types  1. inmemory cookie  2. persistence  cookie
 to create  a cookie 
  document.cookie  to use the create cookie  
destroy cookie
 by using negative value  we can destroy the cookies before the Expire time
<script>
document.cookie ="java=val; expries=-1";
</script>
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