這篇文章主要為大家展示了“Ajax核心框架函數(shù)有哪些”，內(nèi)容簡而易懂，條理清晰，希望能夠幫助大家解決疑惑，下面讓小編帶領(lǐng)大家一起研究并學(xué)習(xí)一下“Ajax核心框架函數(shù)有哪些”這篇文章吧。

10年積累的成都網(wǎng)站設(shè)計(jì)、成都網(wǎng)站建設(shè)經(jīng)驗(yàn)，可以快速應(yīng)對客戶對網(wǎng)站的新想法和需求。提供各種問題對應(yīng)的解決方案。讓選擇我們的客戶得到更好、更有力的網(wǎng)絡(luò)服務(wù)。我雖然不認(rèn)識你，你也不認(rèn)識我。但先網(wǎng)站設(shè)計(jì)制作后付款的網(wǎng)站建設(shè)流程，更有鷹潭免費(fèi)網(wǎng)站建設(shè)讓你可以放心的選擇與我們合作。

核心ajax（options）函數(shù)中，包含了建立xmlhttprequest,提取數(shù)據(jù)，判斷是否回復(fù)成功等，基本滿足了日常需求。

// A generic function for performming AJAX requests
// It takes one argument, which is an object that contains a set of options
// All of which are outline in the comments, below
function ajax( options ) {
// Load the options object with defaults, if no
// values were provided by the user
options = {
// The type of HTTP Request
type: options.type || "POST",
// The URL the request will be made to
url: options.url || "",
// How long to wait before considering the request to be a timeout
timeout: options.timeout || 5000,
// Functions to call when the request fails, succeeds,
// or completes (either fail or succeed)
onComplete: options.onComplete || function(){},
onError: options.onError || function(){},
onSuccess: options.onSuccess || function(){},
// The data type that'll be returned from the server
// the default is simply to determine what data was returned from the
// and act accordingly.
data: options.data || ""
};
// Create the request object
var xml = new XMLHttpRequest();
// Open the asynchronous POST request
//xml.open("GET", "/some/url.cgi", true);
xml.open("GET",options.url, true);
// We're going to wait for a request for 5 seconds, before giving up
var timeoutLength = 5000;
// Keep track of when the request has been succesfully completed
var requestDone = false;
// Initalize a callback which will fire 5 seconds from now, cancelling
// the request (if it has not already occurred).
setTimeout(function(){
requestDone = true;
}, timeoutLength);
// Watch for when the state of the document gets updated
xml.onreadystatechange = function(){
// Wait until the data is fully loaded,
// and make sure that the request hasn't already timed out
if ( xml.readyState == 4 && !requestDone ) {
// Check to see if the request was successful
if ( httpSuccess( xml ) ) {
// Execute the success callback with the data returned from the server
options.onSuccess( httpData( xml, options.type ) );
// Otherwise, an error occurred, so execute the error callback
} else {
options.onError();
}
// Call the completion callback
options.onComplete();
// Clean up after ourselves, to avoid memory leaks
xml = null;
}
};
// Establish the connection to the server
xml.send();
// Determine the success of the HTTP response
function httpSuccess(r) {
try {
// If no server status is provided, and we're actually
// requesting a local file, then it was successful
return !r.status && location.protocol == "file:" ||
// Any status in the 200 range is good
( r.status >= 200 && r.status < 300 ) ||
// Successful if the document has not been modified
r.status == 304 ||
// Safari returns an empty status if the file has not been modified
navigator.userAgent.indexOf("Safari") >= 0 && typeof r.status == "undefined";
} catch(e){}
// If checking the status failed, then assume that the request failed too
return false;
}
// Extract the correct data from the HTTP response
function httpData(r,type) {
// Get the content-type header
var ct = r.getResponseHeader("content-type");
// If no default type was provided, determine if some
// form of XML was returned from the server
var data = !type && ct && ct.indexOf("xml") >= 0;
// Get the XML Document object if XML was returned from
// the server, otherwise return the text contents returned by the server
data = type == "xml" || data ? r.responseXML : r.responseText;
// If the specified type is "script", execute the returned text
// response as if it was JavaScript
if ( type == "script" )
eval.call( window, data );
// Return the response data (either an XML Document or a text string)
return data;
}
}

在同等目錄中，我們可以建立一個rss.xml文件，用這個函數(shù)來訪問。
rss.xml如下：

復(fù)制代碼 代碼如下:

<titles>
<title>
緣份
</title>
<title>
月亮
</title>
<title>
緣份月亮
</title>
</titles>

再建立一個html文檔，調(diào)用它，就能看到rss.xml中的內(nèi)容就能被訪問到。
整體看看，其實(shí)真的比較簡潔和簡單。不僅是能訪問xml格式文件，html，.js格式的文件都可以調(diào)用的；
這些都可以在本地建立對應(yīng)的文件，進(jìn)行調(diào)用，都可以實(shí)現(xiàn)。

以上是“Ajax核心框架函數(shù)有哪些”這篇文章的所有內(nèi)容，感謝各位的閱讀！相信大家都有了一定的了解，希望分享的內(nèi)容對大家有所幫助，如果還想學(xué)習(xí)更多知識，歡迎關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道！

分享題目：Ajax核心框架函數(shù)有哪些-創(chuàng)新互聯(lián)
網(wǎng)站地址：http://www.rwnh.cn/article8/esgop.html

成都網(wǎng)站建設(shè)公司_創(chuàng)新互聯(lián)，為您提供營銷型網(wǎng)站建設(shè)、面包屑導(dǎo)航、外貿(mào)網(wǎng)站建設(shè)、品牌網(wǎng)站制作、品牌網(wǎng)站設(shè)計(jì)、云服務(wù)器

廣告

聲明：本網(wǎng)站發(fā)布的內(nèi)容（圖片、視頻和文字）以用戶投稿、用戶轉(zhuǎn)載內(nèi)容為主，如果涉及侵權(quán)請盡快告知，我們將會在第一時間刪除。文章觀點(diǎn)不代表本網(wǎng)站立場，如需處理請聯(lián)系客服。電話：028-86922220；郵箱：631063699@qq.com。內(nèi)容未經(jīng)允許不得轉(zhuǎn)載，或轉(zhuǎn)載時需注明來源： 創(chuàng)新互聯(lián)