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Meta httpEquiv Property
Meta Object
Definition and Usage
The httpEquiv property sets or returns an HTTP header for the information in the content attribute.
The http-equiv attribute can be used to simulate an HTTP response header.
The value of the http-equiv attribute depends on the value of the content attribute.
Note: If the name attribute is set, the http-equiv attribute should not be set.
Syntax
Set the httpEquiv property:
Return the httpEquiv property:
Some commonly used HTTP-header values are:
| Value | Description |
|---|---|
| cache-control | Controls the caching mechanism to use for the document.
Available values:
Example: <meta http-equiv="cache-control" content="no-cache" /> |
| content-language | Specifies the natural language(s) of the document (used
by search engines to categorize pages by language).
Example: <meta http-equiv="content-language" content="en-US" /> |
| content-type | Specifies the character set for the contents of the document. Tip: It is recommended to always specify the character set. Example: <meta http-equiv="content-type" content="text/html; charset=UTF-8" /> |
| date | Specifies the date and time when the page was created.
Example: <meta http-equiv="date" content="Wed, 16 Feb 2011 22:34:13 GMT" /> |
| expires | Specifies the date and time when the page will expire.
Example: <meta http-equiv="expires" content="Fri, 30 Dec 2011 12:00:00 GMT" /> |
| last-modified | Specifies the last modification date.
Example: <meta http-equiv="last-modified" content="Mon, 03 Jan 2011 17:45:57 GMT" /> |
| location | Redirects the visitor to another location.
Example: <meta http-equiv="location" content="URL=http://www.w3schools.com" /> |
| refresh | Defines a time interval for the document to refresh itself.
Example: <meta http-equiv="refresh" content="300" /> |
| set-cookie | Creates a cookie with specified name,expires date and value.
Example: <meta http-equiv="set-cookie" content="w3scookie=myContent;expires=Fri, 30 Dec 2011 12:00:00 GMT; path=http://www.w3schools.com"> |
| window-target | Specifies the name of the frame where the current document must be loaded |
Browser Support
The httpEquiv property is supported in all major browsers.
Example
Example
Display the HTTP header for the information in the content attribute:
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8" />
<script type="text/javascript">
function displayResult()
{
var x=document.getElementsByTagName("meta")[0].httpEquiv;
alert(x);
}
</script>
</head>
<body>
<button type="button" onclick="displayResult()">Display HTTP-Equiv</button>
</body>
</html>
Try it yourself »
Meta Object
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