ajax

HTTP Cookies and Ajax requests over HTTPS

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Ok, found the solution to the cookie problem. See XHR specs, jQuery docs and StackOverflow. The solution to have the cookies sent when switching protocol and/or subdomain is to set the withCredentials property to true. E.g. (using jQuery) $.ajax( { /* Setup the call */ xhrFields: { withCredentials: true } });

How do I POST an array of objects with $.ajax (jQuery or Zepto)

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Be sure to stringify before sending. I leaned on the libraries too much and thought they would encode properly based on the contentType I was posting, but they do not seem to. Works: $.ajax({ url: _saveAllDevicesUrl , type: ‘POST’ , contentType: ‘application/json’ , data: JSON.stringify(postData) //stringify is important , success: _madeSave.bind(this) }); I prefer this … Read more

List of events

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You might want to look at “JavaScript HTML DOM Events” for a general overview of events: http://www.w3schools.com/jsref/dom_obj_event.asp PrimeFaces is built on jQuery, so here’s jQuery’s “Events” documentation: http://api.jquery.com/category/events/ http://api.jquery.com/category/events/form-events/ http://api.jquery.com/category/events/keyboard-events/ http://api.jquery.com/category/events/mouse-events/ http://api.jquery.com/category/events/browser-events/ Below, I’ve listed some of the more common events, with comments about where they can be used (taken from jQuery documentation). Mouse Events … Read more

Drag-and-drop file upload in Google Chrome/Chromium and Safari?

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WARNING: This is compatibility code for very old versions of Safari and Chrome. Modern browsers all support the FileReader API; here’s one tutorial: https://developer.mozilla.org/en-US/docs/Using_files_from_web_applications This code is now only useful if for some reason you have a need to support Safari 5 and older, or Chrome 6 and older. One possibility is to use the … Read more

How to Set Selected value in Multi-Value Select in Jquery-Select2.?

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Well actually your only need $.each to get all values, it will help you jsfiddle.net/NdQbw/5 <div class=”divright”> <select id=”drp_Books_Ill_Illustrations” class=”leaderMultiSelctdropdown Books_Illustrations” name=”drp_Books_Ill_Illustrations” multiple=””> <option value=” “>No illustrations</option> <option value=”a” selected>Illustrations</option> <option value=”b”>Maps</option> <option value=”c” selected>selectedPortraits</option> </select> </div> <div class=”divright”> <select id=”drp_Books_Ill_Illustrations1″ class=” Books_Illustrations” name=”drp_Books_Ill_Illustrations” multiple=””> <option value=” “>No illustrations</option> <option value=”a”>Illustrations</option> <option value=”b”>Maps</option> <option value=”c”>selectedPortraits</option> … Read more

Javascript: How to read a hand held barcode scanner best?

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Your pseudo code won’t work, because you don’t have access to the scanner to catch events like scanButtonDown. Your only option is a HID scanner, which behaves exactly like a keyboard. To differentiate scanner input from keyboard input you have two options: Timer-based or prefix-based. Timer-based The scanner is likely to input characters much quicker … Read more

how to use jQuery ajax calls with node.js

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If your simple test page is located on other protocol/domain/port than your hello world node.js example you are doing cross-domain requests and violating same origin policy therefore your jQuery ajax calls (get and load) are failing silently. To get this working cross-domain you should use JSONP based format. For example node.js code: var http = … Read more