I'm using Mathjax to display equations in a web application done in PHP/Ajax. The equations are rendered correctly when the page is loaded first.In the same page, when user clicks a button, an ajax code works to fetch some data from database and display it on the same page.But, there the equations are not displaying correctly, instead the latex code is shown as such.But if i refresh the page, then the equations are rendered correctly.How can i solve this issue?
See the MathJax documentation on modifying math on the page for details.
This has changed in the latest version of Mathjax:
Here is my code that worked:
$(function () {
$("button").click(function () {
event.preventDefault();
$.ajax({
url: "/test/Template",
data: $("form").serialize(),
type: "POST",
dataType: "html",
success: function (data) {
$("#Output").css("display", "");
$("#Output").html(data);
MathJax.typeset();
},
error: function (error) {
console.log(error);
},
});
});
});
Related
I am hosting an html page on localhost:8888 with a MAMP Server and I am trying to get some data from a JSON file which I am hosting on localhost:3000 on the 'categories' route. Firstly, I wanted to know is this possible ?
If it is not possible, is it possible for me to route the JSON data to another site. If it is possible, here is the script I have embedded in my HTML
<script>
$(document).ready(function(){
setInterval(test,500);
console.log("document ready");
alert('page ready');
});
function test() {
$.ajax({
url:"HTTP://localhost:3000/categories",
dataType: 'jsonp',
success: function(json){
$("#Address1").html(json[0]["id"]);;
}
});
}
</script>
Here is the JSON file :
[{"_id":"5624711f1a530785d511e747","__v":0,"name":"Beverages","description":"Soft drinks, coffees, teas, beers, and ales","created":"2015-10-19T04:27:11.649Z"}]
Currently, It doesn't display any data. I have tried pure JS instead of jquery but it doesn't help.
This is what I got in the Chrome Console : GET localhost:3000/categories?callback=jQuery1113012827125121839345_1445236000644&_=1445236000645 net::ERR_UNKNOWN_URL_SCHEME
Added http:// - does not make a difference
I need to do something that can only be processed on server side and not by just using javascript on the html page. I'm already using this process for my other aspx pages. However, this time I need to make this work on an html page.
The workaround that I have done so far is to have an iframe somewhere in my html page that points to an aspx page. I do the process on its code behind and save what I need on a hidden field in the iframe. I can now get that value from the iframe and use it on my html page.
It works but I'm thinking that there might be a simpler approach in doing this without having to create a new aspx page just for processing. Is there another way to accomplish this?
UPDATE: To be specific, I need to get the location(country) of the user on page load in order to change the css accordingly. I know there are a lot of sites that I can connect to on my page to do this but I don't know which one is secured. Also, we already have our own method to this for our aspx pages so I want to use that instead. Hope this update helps.
Here is how I would do what I think you are explaining. Your question was not very clear.
http://encosia.com/using-jquery-to-directly-call-aspnet-ajax-page-methods/
$.ajax({
type: "POST",
url: "PageName.aspx/MethodName",
data: "{}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(msg) {
// Do something interesting here.
}
});
HTML
<html>
<head>
<title>Calling a page method with jQuery</title>
<script type="text/javascript" src="jquery-1.2.6.min.js"></script>
<script type="text/javascript" src="Default.js"></script>
</head>
<body>
<div id="Result">Click here for the time.</div>
</body>
</html>
JS
$(document).ready(function() {
// Add the page method call as an onclick handler for the div.
$("#Result").click(function() {
$.ajax({
type: "POST",
url: "Default.aspx/GetDate",
data: "{}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(msg) {
// Replace the div's content with the page method's return.
$("#Result").text(msg.d);
}
});
});
});
But again I really have no idea what you are trying to do. You were really vague.
Yes, simpler approach is ajax.
This is pseudo javascript code...
window.onload = function(){
ajax.open("your server url");
ajax.on("success",function(){
alert("okay, done.");
});
};
Using iFrame for the process you have requested, is not recommended.
Consider including AJAX to route your request to a server resource. In your case it should be an asp page.
Here's a beginners guide to using ajax with asp
http://www.w3schools.com/asp/asp_ajax_asp.asp
PS: When using AJAX make sure you are aware about
Cross Domain Requests http://msdn.microsoft.com/en-us/library/dd573303%28v=vs.85%29.aspx
Access-Control-Allow-Origin
Here's a pseudo code for you to work on:
<script>
function funcName(){
var xmlhttp;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("<yourOwnElement'sID>").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","serverResource.asp?q="+<parameters>,true);
xmlhttp.send();
}
</script>
I am new to phonegap jquery mobile app. In my app i have some pages and each page gets its content as a list-view using json. Now content will load only once i.e when we click on the page for the first time and that's the same case for every other page. Later even if the json gets updated it won't be shown in the list. I can notice the updated list-view only after i logout from the app. and then again i login to the app. i.e content will get updated only after i restart the session!
Take a look at this examples, one example uses xml to create a listview and other one uses a JSON file:
XML: http://jsfiddle.net/Gajotres/AzXdT/
JSON: http://jsfiddle.net/Gajotres/8uac7/
You are probably loading it in a wrong page event, if possible always use pagebeforeshow like this:
$('#index').live('pagebeforeshow',function(e,data){
$.ajax({url: "http://api.themoviedb.org/2.1/Movie.search/en/json/23afca60ebf72f8d88cdcae2c4f31866/The Goonies",
dataType: "jsonp",
jsonpCallback: 'successCallback',
async: true,
beforeSend: function() {
$.mobile.showPageLoadingMsg(true);
},
complete: function() {
$.mobile.hidePageLoadingMsg();
},
success: function (result) {
ajax.parseJSONP(result);
},
error: function (request,error) {
alert('Network error has occurred please try again!');
}
});
});
Also take a look at my other article, it will give you a better understanding of jQM page events flow: https://stackoverflow.com/a/14010308/1848600
I have searched many times and find examples which match my code structure perfect. Yet I am not getting the results from my ajax to display on the input box.
I get results from the POST that have been evaulated with firebug and everything looks great.
Here is the javascript im using.
<script type="text/javascript" language="javascript">
$(function () {
$("input.FamousPerson-List").autocomplete({
source: function (request, response) {
$.ajax({
url: "/FamousPeople/FPPAutoComplete",
type: "POST",
dataType: "json",
data: {
searchText: request.term,
maxResults: 12
},
success: function (data) {
response($.map(data, function (item) {
return {
value: item.DisplayName
}
}))
}
});
}
});
});
Here is a link of the actual code I am using on the web.AutoCompleteTesting Type just about any letter in one of the boxes below to invoke it.
Thanks.
If you look closely at the request being sent up, you'll notice that a callback parameter is being added. Weird, right? Since you're doing a local AJAX post, not a cross-domain (JSONP) one.
I noticed that your project includes jQuery Validate. According to this answer to a question dealing with a similar problem (performing a JSONP request instead of a normal JSON request even though you asked for one), it's a known issue in jQuery validate.
Judging by the other answer, you can change your version of jQuery or perhaps use a patched version of jQuery validate (found here).
I need to do a cross-domain request in a chrome extension. I know I can it via message passing but I'd rather stick to just jQuery idioms (so my javascript can also work as a <script src="">).
I do the normal:
$.getJSON("http://api.flickr.com/services/feeds/photos_public.gne?tags=cat&tagmode=any&format=json&jsoncallback=?", function(data) {
console.log(data);
});
but in the error console I see:
Uncaught ReferenceError: jsonp1271044791817 is not defined
Is jQuery not inserting the callback function correctly into the document? What can I do to make this work?
(If I paste the code into a chrome console, it works fine, but if I put it as the page.js in an extension is when the problem appears.)
Alas, none of these worked, so I ended up doing the communication via the background.html.
background.html
<script src="http://code.jquery.com/jquery-1.4.2.js"></script>
<script>
function onRequest(request, sender, callback) {
if (request.action == 'getJSON') {
$.getJSON(request.url, callback);
}
}
chrome.extension.onRequest.addListener(onRequest);
</script>
javascripts/page.js
chrome_getJSON = function(url, callback) {
console.log("sending RPC");
chrome.extension.sendRequest({action:'getJSON',url:url}, callback);
}
$(function(){
// use chrome_getJSON instead of $.getJSON
});
If you specify "api.flickr.com" in your manifest.json file you will not need to use the JSONP callback, script injection style of cross domain request.
For example:
"permissions": ["http://api.flickr.com"],
This should work beautifully in you code. I would remove the querystring parameter "&jsoncallback" as there is no JSONP work needed.
The reason why your current code is not working is your code is injecting into pages DOM, content scripts have access to the DOM but no access to javascript context, so there is no method to call on callback.
My impressions it that this fails because the jQuery callback function is being created within the 'isolated world' of the Chrome extension and is inaccessible when the response comes back:
http://code.google.com/chrome/extensions/content_scripts.html#execution-environment
I'm using Prototype and jQuery for various reasons, but my quick fix should be easy to parse:
// Add the callback function to the page
s = new Element('script').update("function boom(e){console.log(e);}");
$$('body')[0].insert(s);
// Tell jQuery which method to call in the response
function shrink_link(oldLink, callback){
jQuery.ajax({
type: "POST",
url: "http://api.awe.sm/url.json",
data: {
v: 3,
url: oldLink,
key: "5c8b1a212434c2153c2f2c2f2c765a36140add243bf6eae876345f8fd11045d9",
tool: "mKU7uN",
channel: "twitter"
},
dataType: "jsonp",
jsonpCallback: callback
});
}
// And make it so.
shrink_link('http://www.google.com', "boom");
Alternatively you can try using the extension XHR capability:
http://code.google.com/chrome/extensions/xhr.html
var xhr = new XMLHttpRequest();
xhr.open("GET", "http://api.example.com/data.json", true);
xhr.onreadystatechange = function() {
if (xhr.readyState == 4) {
// JSON.parse does not evaluate the attacker's scripts.
var resp = JSON.parse(xhr.responseText);
}
}
xhr.send();
The syntax is a little off. There's no need for the callback( bit. This works flawlessly. Tested in the javascript console of Chrome on this StackOverflow page (which includes jQuery):
$.getJSON("http://api.flickr.com/services/feeds/photos_public.gne?tags=cat&tagmode=any&format=json&jsoncallback=?", function(data) {
console.log(data);
});
As many of you will know, Google Chrome doesn't support any of the handy GM_ functions at the moment.
As such, it is impossible to do cross site AJAX requests due to various sandbox restrictions (even using great tools like James Padolsey's Cross Domain Request Script)
I needed a way for users to know when my Greasemonkey script had been updated in Chrome (since Chrome doesn't do that either...). I came up with a solution which is documented here (and in use in my Lighthouse++ script) and worth a read for those of you wanting to version check your scripts:
http://blog.bandit.co.nz/post/1048347342/version-check-chrome-greasemonkey-script