How do I know if jQuery has an Ajax request pending?
$.active returns the number of active Ajax requests. More info here
xmlhttprequest
fetch – Missing boundary in multipart/form-data POST
The solution to the problem is to explicitly set Content-Type to undefined so that your browser or whatever client you’re using can set it and add that boundary value in there for you. Disappointing but true.
Handling cookies in PhoneGap/Cordova
Friend, I’ve tried too without success to use cookies with phonegap. The solution was use localStorage. Key Quick Example: var keyName = window.localStorage.key(0); Set Item Quick Example: window.localStorage.setItem(“key”, “value”); Get Item Quick Example var value = window.localStorage.getItem(“key”); // value is now equal to “value” Remove Item Quick Example: window.localStorage.removeItem(“key”); Clear Quick Example: window.localStorage.clear(); If you … Read more
enabling cross-origin resource sharing on IIS7
It is likely a case of IIS 7 ‘handling’ the HTTP OPTIONS response instead of your application specifying it. To determine this, in IIS7, Go to your site’s Handler Mappings. Scroll down to ‘OPTIONSVerbHandler’. Change the ‘ProtocolSupportModule’ to ‘IsapiHandler’ Set the executable: %windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll Now, your config entries above should kick in when an HTTP OPTIONS … Read more
How can I send the “&” (ampersand) character via AJAX?
You can use encodeURIComponent(). It will escape all the characters that cannot occur verbatim in URLs: var wysiwyg_clean = encodeURIComponent(wysiwyg); In this example, the ampersand character & will be replaced by the escape sequence %26, which is valid in URLs.
loading json data from local file into React JS
I was trying to do the same thing and this is what worked for me (ES6/ES2015): import myData from ‘./data.json’; I got the solution from this answer on a react-native thread asking the same thing: https://stackoverflow.com/a/37781882/176002
Does an HTTP Status code of 0 have any meaning?
Short Answer It’s not a HTTP response code, but it is documented by WhatWG as a valid value for the status attribute of an XMLHttpRequest or a Fetch response. Broadly speaking, it is a default value used when there is no real HTTP status code to report and/or an error occurred sending the request or … Read more
What do the different readystates in XMLHttpRequest mean, and how can I use them?
The full list of readyState values is: State Description 0 The request is not initialized 1 The request has been set up 2 The request has been sent 3 The request is in process 4 The request is complete (from https://www.w3schools.com/js/js_ajax_http_response.asp) In practice you almost never use any of them except for 4. Some XMLHttpRequest … Read more
What is the cleanest way to get the progress of JQuery ajax request?
Something like this for $.ajax (HTML5 only though): $.ajax({ xhr: function() { var xhr = new window.XMLHttpRequest(); xhr.upload.addEventListener(“progress”, function(evt) { if (evt.lengthComputable) { var percentComplete = evt.loaded / evt.total; //Do something with upload progress here } }, false); xhr.addEventListener(“progress”, function(evt) { if (evt.lengthComputable) { var percentComplete = evt.loaded / evt.total; //Do something with download progress … Read more
XMLHttpRequest status 0 (responseText is empty)
status is 0 when your html file containing the script is opened in the browser via the file scheme. Make sure to place the files in your server (apache or tomcat whatever) and then open it via http protocol in the browser. (i.e. http://localhost/myfile.html) This is the solution.