JQuery :: Calling An Anonymous Function?
Feb 3, 2011I have a problem with understanding jQuery. In my case I have this JS file with following content (see below). This is an anonymous function, isn't it? The problem is this line:
[Code]...
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JQuery :: Pass Reference To An Object To Anonymous Function?
Aug 2, 2010I would like to know how to pass in a reference of this to anonymous function so I can access parameters from anonymous. Here is my code:
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JQuery :: Related To Setting Global Variables From Anonymous Function (valid = False;)?
Oct 22, 2010//<input type="text" id="s_field" value=""/>
var valid = true;
var div = $("#s_field");
$.post("index.php",{id: 6}, function (data){
[Code]..
When posting data, and getting response need to set valid to false - email is not valid.
1. in function it alerts valid is false
2. outside function it says valid is still true!
even i didn't wrote var valid = false;, but valid = false;I need to set Global "valid" variable to false.
Getting Return Value From Post Anonymous Function
Jan 8, 2011I have been struggling with a form wizard all day. I'm using jquery stepy (form wizard) along with validation plugin. To cut a long story short, my first step is to get MySQL connection from form controls details. On submit ('next' button) a check is made on an empty hidden control ('hid').
rules: {
hid: {
required: function(){
return checkDBData();
},
messages: {
hid:
{required: 'SQL not available'},
...(etc)...
So, if the function checkDBData passes, false should be returned, so that the form can progress to the next step. If the connection details fail, true is returned so that an error msg is posted.
Here's the checkDBData function:
function checkDBData(){
var host = $('#mysql_host').val();
var username = $('#username').val();
var password = $('#password').val();
var dbname = $('#dbname').val();
$.post("install/sqlcheck.php",
{"host": host,"username": username, "password": password, "dbname": dbname},
function(msg){
if(msg.required == false){
return false;
}else{
return true;
}},
"json"
);
}
The return values don't find their way back to the rules. However, if I hard code false and true to the function...
function checkDBData(){
var host = $('#mysql_host').val();
var username = $('#username').val();
var password = $('#password').val();
var dbname = $('#dbname').val();
$.post("install/sqlcheck.php",
{"host": host,"username": username, "password": password, "dbname": dbname},
function(msg){
if(msg.required == false){
return false;
}else{
return true;
}},
"json"
);
return false; //or return true for testing purposes
}
This works. I assume it's due to the asynchronous nature of the ajax call.
Creating Anonymous Function With Variable?
Mar 20, 2010I'm having trouble with something that I can't explain outside of an example. Code:
Code:
$js_info_tabs = json_encode($valid_array);
$script = <<<JAVASCRIPT
<script type="text/javascript">//<![CDATA[
function changeTo(id) {
[Code]....
I have the code this way in order to consolidate it since I would prefer to do that instead of checking the selected ID and manually checking against all possible IDs (which works flawlessly, it just takes up about 5x the lines and is not modular). What I have above also works, but there is one fatal flaw:
It seems like the anonymous function that is the onclick for each unselected element becomes "return changeTo(tab + '_id')", but I don't want it to be that. I want the argument to actually be what tab is instead of the variable.
What ends up happening is that after changeTo() is called for the first time, any element you click will result in the last element being the selected one, as if it's using the final value of tab as its return value.
This doesn't make any sense, though, since tab is local, and deleting it before the function exists doesn't work. Deleting elem at the end of the for loop doesn't work. I honestly don't understand what's going on or why it doesn't set the new onclick value correctly.
Basically I just want changeTo(tab + '_id'); to turn into changeTo('MYID_id'); instead, but it simply doesn't do that and I can't figure out a way how.
Giving AddEventListerner An Anonymous Function?
Nov 3, 2011var name = "good";
load_image( name );
function load_image( name )
[code]....
I've tried giving addEventListerner an anonymous function
Returning ResponseXML, Set Within An Anonymous Function, Only Once ReadyState = 4
Dec 4, 2006I have several functions with code along the lines of:
var xmlDoc = requestXML("ajax.asp?SP=SelectRelatedTags&tag=" +
array[i]);
The requestXML() function includes the code:
var xmlDoc = null;
http_request.onreadystatechange = function() {
if (http_request.readyState == 4) {
if (http_request.status == 200) {
xmlDoc = http_request.responseXML;
} else {
alert('There was a problem with the request.' +
http_request.status);
}}};
http_request.open('GET', url, true);
http_request.send(null);
return xmlDoc;
However, the last line (the return) executes before the readyState
reaches 4. How do I return the xmlDoc to the functions only once the
xmlDoc has been assigned? I tried putting the return statement in a
while loop with the condition that the readyState must = 4 - this
worked, but makes the browser popup a message saying the script is
slowing down the system.
Passing Anonymous Function From SetTimeout() - IE Doesn't Like - FF Does
Jun 6, 2009I did search the forums but couldn't seem to find anything on this specifically. I basically need to pass a key event and a 'name' to nameCheck() after 3 seconds. This works fine in Firefox but Internet Explorer gives the error: Member not found. I'm more of a PHP guy than a JS one
<input type="text" onkeyup="nameCheckTimer(this.value, event)" value="" />
function nameCheckTimer(name, evt) {
setTimeout(function(){return nameCheck(name,evt)}, 3000);
}
function nameCheck(name, evt) {
//need name and the key event to be available here. I have code to handle the key codes which works fine
}
Passing 'this' To Anonymous Function In Event Listener
Jun 10, 2010I'm working with nested functions and trying to pass a 'this' value to an anonymous being used in an assignment for an event listener.So, this should plop a button inside our DIV and when clicked I'd like it to run the alert-ding; unfortunately it seems to want to run the function as defined under the buttons object which doesn't work out too well.
View 3 Replies View RelatedWhen Closures, Loops, Function References, And Anonymous Functions Interact
Oct 16, 2010I am confused about the true difference between the two below examples.
first example:
// Demonstrating a problem with closures and loops
var myArray = [“Apple”, “Car”, “Tree”, “Castle”];
var closureArray = new Array();
[code]....
Here we iterate through the length of myArray, assigning the current index of myArray to theItem variable. We declare closureArray 4 times as an anonymous function. The anonymous function in turn declares the predefined write() function, which is passed parameters. Since write() is in closureArray() a closure is created??? During each iteration, theItem is reassigned its value. The four closures reference this value. Since they reference this same value and since this value is reassigned ultimately to the value of the fourth index position, tHe time we execute closureArray later on, all four closures output the same string. This is because all four closures are within the same scope "the same environment" and therefore are referencing the same local variable, which has changed.
I have a couple of problems with this example:
1) I thought a closure is a function that is returned - the inner function is not returned above.
2) theItem is not even a local variable of the parent function (closureArray) - I thought in order for a closure to work, the inner function only accesses the local variables of the outer function, but in this case the local variable is defined OUTSIDE of the parent function.
3) the "the four closures are sharing the same environment." The thing is even in the second example, they are sharing the same environment.
Second example:
// A correct use of closures within loops
var myArray = [“Apple”, “Car”, “Tree”, “Castle”];
var closureArray = new Array();
[code]....
Here we iterate over the length of myArray (4 times), assigning the index of myArray to theItem variable. We also return a function reference to the closureArray during each iteration (closureArray[i]), where i is index number so we assign 4 functon references. So when we iterate through myArray, we immediatelly call the writeItem() fucntion passing an argument of theItem at its current value. This returns a child anonymous function and when that child function is called, it will execute a block that calls the predefined write() method. We assign that returned anonymous function to the variable closureArray. Hence, closureArray holds a reference to that anonymous function. So closureArray during each iteration holds a reference to the anonymous function and we later call closureArray, which in turn calls the anonymous function, therefore calling the predefined write() function to output the local variable of the parent function. This outputs each distinct index of myArray.
This is because since we created the closure, when we call writeItem, passing theItem argument, since theItem is a local variable of the parent function of the closure, it is never destroyed when we later call closureArray (the reference to the child anonymous function)? Yet weren't we using a closure in the first example as well? So whey wasn't those variables preserved?
I don't think it has anything to do with assigning a returned anonymous function to closureArray. Even though an anonymous function creates a new memory position in the javascript engine, therefore not overwriting the other function references we create during the iteration, it's still referring to a local variable declared outside the reference. So if it's about the closure retaining value of parent's local variable even after exiting the parent function allowing for the current indexes to be preserved, then why did the closure in the first example fail to retain each index?
Create An Anonymous Function For Onchange Event Of File Field?
Feb 28, 2010I am trying to create an anonymous function for onchange event of file field, so that when a file is selected, the covering text field gets that value. I know how to accomplish this by adding onchange="", but I'd prefer not do that. The code that I have almost works, except that the function in the for loop can't call on the "i" variable that the loop uses.
for( i = 0; i < source.length; i++) {
source[i].onchange = function() {
name[i].value = this.value;
}
}
JQuery :: Calling A Function ... $('submit").click(ClickGeocode) Versus Simply Calling ClickGeocode(credentials)
Jul 17, 2011I have a form button with id="submit". When pressed, ClickGeocode(credentials) is called. This works fine and dandy with: $('submit").click(ClickGeocode) Despite there being no indication that the function takes an argument 'credentials'. So when I want to call the function at some point in my code, I should be able to do something like ClickGeocode(credentials) ... no? However, my issue is that credentials isn't once defined in my code - it is part of Bing Maps function... like so:
function ClickGeocode(credentials)
{
map.getCredentials(MakeGeocodeRequest);
}
So why does it work using .click(), and how can I call the function without user interaction (simply somewhere in my code) even if 'credentials' is not defined?
JQuery :: Calling A Function Within The Ready Function From Another File?
Jun 18, 2010I have 2 javascript files: 1 containing generic functions for my site used sitewide and another for a particular web page containing just the javascript for that page. The page is also calling the jQuery javascript file.
What I want to do is have a javascript function in my main javascript file which uses features of jQuery such as show, hide etc. and then I want to call this javascript function from the other page specific javascript file.
[Code]...
This does not work and so was wondering if anyone can point me in the right direction as to how to achieve this or something similar.
Accessing Class Member Using This Inside An Anonymous Function Call In A Class Method?
Mar 28, 2010I'm using jquery to make it easy for AJAX calls.
So I create a class: function cMap(mapID){//vars and stuff}
I go and prototype a function: cMap.prototype.loadMap = function(){ //jquery AJAX call }
Now in the jquery $.ajax({...}); call, I use an anonymous function on the "success:" call: success: function(data){ this.member = data; }
My problem is that inside this anonymous function call I'm trying to call a class member of my cMap class to store the data in from the AJAX call, but it's out of scope. So the JS console in FF/Chrome throws errors about bad value/doesn't exist.
How can I access this class member from inside an anonymous function? Or at least what's a good way to go about doing all this?
JQuery :: Calling A Function From Another Function
Feb 18, 2011Would like to do this:
The function setEqualHeight(columns) fires on document.ready and works well. However, in the second function (the tab function) I would like to to call the setEqualHeight function in order to recalculate the div heights again. I would like to do this in the "onclick function". How?
JQuery :: Calling A Function From A Dialog Box?
Aug 9, 2010Can a function that is on the main page or in the jquery lib be called from a dialog box after the dialog has been opened, eg
I have a upload dailog box and I what to call the upload functions that will be on the main page for uploading the pictures.
JQuery :: Calling A Function Outside Of .js File?
Jul 15, 2009In my index file I have global.js sourced into the head, which contains the following function.
function gotoShop() {
currentPage = "shop";
checkMenu();
[code]....
JQuery :: Calling A .php Function In Append?
May 31, 2010I see some examples about how to append text to the bottom of your content on an html page.In my head I was thinking I could call append(php file here) and have it go out, do the php and then append it to the html.I just am not sure how to have a .php file do something and then append it to my html content.I have it like this.
<script>
$(document).ready(function( ) {
$("#button".click(function( ) {
[code]....
JQuery :: Calling Function Through Onload?
Aug 31, 2010I'm playing with a modal Dialog of ericmartin (simplemodal) which I found at this url: [URL]
It's called "Confirm override". This function is called through a click on the button or on the link. Now I want to call this function onload I dont' have really a clue, how to manipulate the current script to make the correct changes.
Imho this is the code snippet, which calls the popup through a click.
jQuery(function ($) {
$('#confirm-dialog input.confirm, #confirm-dialog a.confirm').click(function (e) {
e.preventDefault();
// example of calling the confirm function
[Code].....
how to make the popup via "onload".
JQuery :: Calling Function On Click?
Sep 22, 2009Bit of a newb to jquery. I have got a jquery slider effect nestled in some tabs. Each tab has one slider in it. When the page initially loads it loads the effect in the first tab only. On clicking the second tab the function isn't called and remains displayed without the effect.
[Code]...
JQuery :: Calling A Function From RJS/onclick?
Aug 7, 2009Im using jNice (a jQuery plugin) in rails. I have the following jQueryfunction on the head of my page.
<script type="text/javascript">
jQuery.noConflict();
/* calling jNice on document ready */
[code]....
JQuery :: Calling An Iframe's Function?
Nov 3, 2009Is there a way to implement this JavaScript commmand through JQuery? document.getElementById('iframeid').contentWindow.myFunc();
View 1 Replies View RelatedJQuery :: Calling C#-function In The Validator?
Jun 5, 2009I'm quite new to Jquery, so I need some sort of advice. I'm working on a webbased application with a webservice. First it was a simple html site, but later I started using Jquery. Data is inserted in some forms, this I can easily validate through the validator. Now after all the data is ok, it's send to the webservice through the C#-code. Some calculations are being made with the data and a dataset is returned. Now some errors can occur while doing the calculations. I can't get some manual error in the errorbox of the validator. Is it possible to let the validator run some c#-function so I can see if the data is correct? Or can I set a unvisible checkbox to true/false through the c#-code so the validator check this box? A problem with both is, that the validator runs when I click on the "Next"-button. After the validaton, the function starts, so if I set the checkbox to false, the validator won't even notice. Anyone knows a handy approach for this?
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JQuery :: Calling Function Through An Event?
Oct 12, 2009I am using a slider and want to add labels to the slide/start event. How can I call function from these events? Something like this:
$(function() {
$("#slider").slider({
value:0,
min: 0,
[Code]....
JQuery :: Calling Function From .js File
Jul 22, 2010I have a jquery plugin for an image gallery, and i'm trying to tweak it to be able to change the shown image via a drop down menu.
In the .js file I have this working function:
My issue is, how do I call this from within my html file?
I've moved the function into my html header and called it succesfully.. but only the alert occurs... The problem seems to be that once called it doesnt know what gallery.gotoIndex(1, false, true); means and goes nowhere...
So I come back to the issue of how do I call this when it sits within the jquery plugin.js?
Also I want to be able to pass the drop down menu selection value to the function... would this work?
JQuery :: What Is The Syntax For Calling Function With []
Jul 8, 2010I have seen the following methods to call a function in jQuery.
Case 1: $.validator.methods[method].call
Case 2: $.validator.methods[method](parameter1)
Where can I find the reference document for the usage of [] to call a function in jQuery.
