id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
en-wikipedia-org-9396		Ajax (programming) - Wikipedia			.html	text/html	3082	505	69	With Ajax, web applications can send and retrieve data from a server asynchronously (in the background) without interfering with the display and behaviour of the existing page. The built-in XMLHttpRequest object, or since 2017 the new "fetch()" function within JavaScript, is commonly used to execute Ajax on webpages, allowing websites to load content onto the screen without refreshing the page. In 1998, the Microsoft Outlook Web Access team developed the concept behind the XMLHttpRequest scripting object.[4] It appeared as XMLHTTP in the second version of the MSXML library,[4][5] which shipped with Internet Explorer 5.0 in March 1999.[6] Excluding Google,[25] most major Web crawlers do not execute JavaScript code,[26] so in order to be indexed by Web search engines, a Web application must provide an alternative means of accessing the content that would normally be retrieved with Ajax.	./cache/en-wikipedia-org-9396.html	./txt/en-wikipedia-org-9396.txt