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ajax{} | JavaScript object | AJAX methods object
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// examples | |
;(function () { | |
ajax.json('file.php', {best: "cats", awesome: "javascript"}, function (json) { | |
var foo = document.getElementById('foo'); | |
for (var ii = 0, len = json.length; ii < len; ii++) { | |
foo.innerHTML += '<li>' + json[ii].name + ': ' + json[ii].details + '</li>'; | |
} | |
}); | |
ajax.load('example.html', '', function (xhr) { | |
document.getElementById('bar').innerHTML = xhr.responseText; | |
}); | |
})(); |
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/** | |
* AJAX | |
* ------------------------------------------------------------------------ | |
* ajax{} | |
* @version 1.0 | April 23rd 2013 | |
* @author Beau Charman | @beaucharman | http://beaucharman.me | |
* @link https://gist.github.com/beaucharman/5384446/ | |
* @method load | |
* @method json | |
* @method toQueryString | |
* | |
* Some AJAX and JSON helper functions. | |
* Todo | |
* 1. callback that simply returns the value | |
* 2. send params as object | |
* ------------------------------------------------------------------------ */ | |
var ajax = { | |
/** | |
* Load | |
* ------------------------------------------------------------------------ | |
* ajax.load() | |
* @param {string} url | |
* @param {object} data | |
* @param {function} callback | |
* | |
* AJAX loads data from url. | |
* ------------------------------------------------------------------------ */ | |
load: function (url, data, callback) { | |
var xhr; | |
data = (data) ? this.toQueryString(data) : ''; | |
/* Get the xmlhttp request method */ | |
if (window.XMLHttpRequest && typeof XMLHttpRequest !== 'undefined') { | |
xhr = new XMLHttpRequest(); | |
} else if (window.ActiveXObject) { | |
var versions = [ | |
"MSXML2.XmlHttp.5.0", | |
"MSXML2.XmlHttp.4.0", | |
"MSXML2.XmlHttp.3.0", | |
"MSXML2.XmlHttp", | |
"Microsoft.XmlHttp" | |
]; | |
for (var ii = 0, ln = versions.length; ii < ln; ii++) { | |
try { | |
xhr = new ActiveXObject(versions[ii]); | |
break; | |
} | |
catch(e){} | |
} | |
} | |
/* Capture and act on state changes */ | |
xhr.onreadystatechange = function() { | |
if (xhr.readyState !== 4 || xhr.status !== 200) { | |
return; | |
} | |
callback(xhr); | |
}; | |
xhr.open('POST', url, true); | |
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded'); | |
xhr.send(data); | |
}, | |
/** | |
* JSON | |
* ------------------------------------------------------------------------ | |
* ajax.json() | |
* @param {string} url | |
* @param {object} data | |
* @param {function} callback | |
* | |
* Loads and then parses JSON data from url. | |
* ------------------------------------------------------------------------ */ | |
json: function (url, data, callback) { | |
this.load(url, data, function (xhr) { | |
callback(JSON.parse(xhr.responseText)); | |
}); | |
}, | |
/** | |
* To Query String | |
* ------------------------------------------------------------------------ | |
* ajax.toQueryString() | |
* @param {object} obj | |
* @return {string} | |
* | |
* Converts a javaScript object into a URL friendly query string. | |
* ------------------------------------------------------------------------ */ | |
toQueryString: function (obj) { | |
var str = ''; | |
var ln; | |
for (var pro in obj) { | |
str += pro + '=' + obj[pro] + '&'; | |
} | |
ln = str.length; | |
return str.slice(0, ln - 1); | |
} | |
}; | |
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