The http-equiv attribute of the <meta> element allows you to provide processing instructions for the browser as if the response that returned the document included certain HTTP headers.

Note:The value of the content attribute above must match the value of the title attribute on a link element in the same document, or it must match the value of the title attribute on a style element in the same document.

Fortunately, developers can leverage meta HTML tags to control caching behaviour, ensuring users receive the latest content promptly. This article explores the significance of browser caching and demonstrates the use of meta HTML tags to enhance web speed.

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Http-equiv özeliğini popüler tüm tarayıcılar desteklemektedir. Http-equiv özelliği content özelliği ile HTTP üstbilgisi çiftini (bilgi-değer) belirtir. Http-equiv özelliği HTML belgelerinde karakter kodunu belirtmenin tek yolu değildir: HTML 4.01: <meta http-equiv="Content-type" content="text/html" charset="UTF-8"> HTML 5: <meta charset="UTF-8">

For meta elements with an http-equiv attribute in the Encoding declaration state, the content attribute must have a value that is an ASCII case-insensitive match for a string that consists of: " text/html; ", optionally followed by any number of ASCII whitespace, followed by " charset=utf-8 ".

Defines a pragma directive, which are instructions for the browser for processing the document. The attribute's name is short for http-equivalentbecause the allowed values are names of equivalent HTTP headers.

The content attribute gives the value of the document metadata or pragma directive when the element is used for those purposes. The allowed values depend on the exact context, as described in subsequent sections of this specification. If a meta element has a name attribute, it sets document metadata.

For example, while you can include a language directive with <meta http-equiv="content-language" content="en-us" />, we have already discussed using the lang attribute on the HTML element, which is what should be used instead. The most common pragma directive is the refresh directive.

The title attribute on style elements, like the title attribute on link elements, differs from the global title attribute in that a style block without a title does not inherit the title of the parent element: it merely has no title.