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A page with more than one <meta .... expires> element

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Say I have a page where I have two <META HTTP-EQUIV="expires" CONTENT="..."> elements with different expiration date. What does the standard say about this (in HTML4 and HTML5 respectively)?


  • Undefined behaviour?
  • The first is valid?
  • The second one is valid?
  • The one with the earlier date is valid?

I tried to google for this problem, but didn't find an answer...


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I don't believe the HTML specification tells browsers how to react to multiple headers.


You might find results in the HTTP specification about it. My guess is that only the most recent header is taken into account. Note that the HTML <meta> tag only provides a suggestion, as it is not actually a real HTTP header; the browser may choose to ignore it.

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