Prior to JavaScript and other client-side languages, Web browsers
\noperated as if they were HTML dumb terminals, merely presenting Web
\npages generated on a server. For such pages, every user action requires
\na full page refresh, with a round-trip over the Internet, which
\ndegrades performance and thus user satisfaction. It may be fine for a
\ngreat many Web sites, but it is completely inadequate for
\nhigh-performance dynamic Web applications. Even e-commerce sites using
\nwholesale page refreshes every time, find that users can encounter all
\nkinds of problems. For instance, e-commerce sites often exhort
\ncustomers to not use their browser\u2019s Back button while shopping online,
\nand to not click the Submit button twice should the purchase page fail
\nto respond. But what if the network hangs and customer does not know if
\nthe purchase went through?<\/p>\n
Traditional use of JavaScript made it possible to embed
\nfunctionality on the client-side, with far superior speed, by
\neliminating network traffic. It was \u2014 and continues to be \u2014 ideal for
\nsuch needs as user form validation. But such JavaScript code does not
\ncommunicate with the server, and thus has no way of accessing
\napplication data from a database, or even maintaining state in between
\npage refreshes.<\/p>\n
AJAX (Asynchronous JavaScript and XML) evolved in an effort to solve
\nthe aforesaid problems, by allowing the browser to communicate with the
\nserver, behind the scenes, without having to refresh the entire page.
\nIt accomplishes this by using JavaScript to only change that portion of
\nthe current Web page that needs to be changed. AJAX can make the user\u2019s
\nbrowser behave more like a desktop application, combining server
\ninteraction with far greater performance than traditional server-side
\nlanguages. AJAX is asynchronous in the sense that the needed data is
\nobtained from the server and loaded without interfering with the
\ndisplay and behavior of the current Web page. The data is requested
\nthrough use of the XMLHttpRequest object, and typically formatted in
\nXML \u2014 hence the rest of the acronym.<\/p>\n
But raw AJAX programming can be quite difficult, partly because AJAX
\ncode is typically quite daunting, and partly because Web browsers have
\nimplemented JavaScript differently, despite a convergence upon
\nECMAScript standards, promulgated by the European Computer
\nManufacturers Association (ECMA). As a result, AJAX programmers can
\nspend much of their development time dealing with incompatibilities
\namong browsers and operating systems.<\/p>\n","protected":false},"excerpt":{"rendered":"
Prior to JavaScript and other client-side languages, Web browsers operated as if they were HTML dumb terminals, merely presenting Web pages generated on a server. For such pages, every user action requires a full page refresh, with a round-trip over the Internet, which degrades performance and thus user satisfaction. It may be fine for a […]<\/p>\n","protected":false},"author":1,"featured_media":4466,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0},"categories":[1],"tags":[51],"_links":{"self":[{"href":"https:\/\/a1webdesignteam.com\/blog\/wp-json\/wp\/v2\/posts\/4464"}],"collection":[{"href":"https:\/\/a1webdesignteam.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/a1webdesignteam.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/a1webdesignteam.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/a1webdesignteam.com\/blog\/wp-json\/wp\/v2\/comments?post=4464"}],"version-history":[{"count":0,"href":"https:\/\/a1webdesignteam.com\/blog\/wp-json\/wp\/v2\/posts\/4464\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/a1webdesignteam.com\/blog\/wp-json\/wp\/v2\/media\/4466"}],"wp:attachment":[{"href":"https:\/\/a1webdesignteam.com\/blog\/wp-json\/wp\/v2\/media?parent=4464"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/a1webdesignteam.com\/blog\/wp-json\/wp\/v2\/categories?post=4464"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/a1webdesignteam.com\/blog\/wp-json\/wp\/v2\/tags?post=4464"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}