Whats the difference for Expires using Plus in htaccess?

Question

What is the difference between these two lines?

ExpiresByType application/javascript "access plus 1 year"
ExpiresByType application/javascript "access 1 year"

Do they mean the same thing?

Answer 1

According to the mod_expires manual:

The ExpiresDefault and ExpiresByType directives can also be defined in a more readable syntax of the form:

ExpiresDefault "base [plus num type] [num type] ..."
ExpiresByType type/encoding "base [plus num type] [num type] ..."

where base is one of:

• access
• now (equivalent to 'access')
• modification

The plus keyword is optional. num should be an integer value [acceptable to atoi()], and type is one of:

• years
• months
• weeks
• days
• hours
• minutes
• second

So no - there's no difference.