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| Link prefetching ： ウィキペディア英語版 |
Link prefetching is a syntax to give web browsers a hint about documents that it should pre-fetch because the user might visit them in the near future. It was proposed as a draft internet standard by Mozilla. A web page provides a set of prefetching hints to the browser, and after the browser is finished loading the page, and after an idle time has passed, it begins silently prefetching specified documents, storing them in its cache. When the user visits one of the prefetched documents, it can be served up quickly out of the browser's cache. It is most effective in cases where the content provider may be reasonably certain which link or links the user is going to visit next.
Link prefetching is included in a WHATWG Living document and the W3C Candidate Recommendation for HTML5. It is partially implemented in Mozilla Firefox, and a different but related concept is implemented in Google Chrome. Internet Explorer 9 and newer instead use DNS prefetching to improve the user experience, with newer versions providing support for other types of prefetching.
==HTML5 prefetching==
Below are various methods that enable different types of link prefetching in supported browsers using HTML5 markup language to display a given link :
*Standard link prefetching (executed by most modern browsers):
*DNS prefetching (Mozilla Firefox, Google Chrome, and others):
*Prerendering (Google Chrome, Internet Explorer and others):
*Lazy-load (Images) (Internet Explorer):
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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