I need to acsess an object property via variables, but don't get ahead.
Example:
var property = height;
"height" is a property of the object "flower". Now, I need a possibility to access "flower.height" with my variable property, means -->"flower.property" I tried everything like "flower.[property]" "flower.['property']" etc. but nothing did help.
I am trying some simple things with javascript and trying to use it in a object oriented way. However I am now facing a problem in which I can't access an object variable from an object method. I am using jQuery.
My code is as follows;
Code:
My problem is that the variable msg1 does not work when accessed from function called from the jQuery get function. I get the message undefined. Therefore I am wondering, is there a way how I can access msg1 of my object instance from the get function of jQuery?
How is it possible to take the value of a variable (in this case,
MODE_CREATE, MODE_UPDATE, etc) and use that as an object property name?
In the following example I want 'oIcon' object to have the properties:
mode1, mode2, and mode3.
This seems simple but I can't quite figure it out...
Any ideas anyone?
var MODE_CREATE = "mode1";
var MODE_UPDATE = "mode2";
var MODE_DELETE = "mode3";
var oIcon = {
MODE_CREATE: "create.gif"
, MODE_UPDATE: "update.gif"
, MODE_DELETE: "delete.gif"
};
var oTitle = {
MODE_CREATE: "Create a new item..."
, MODE_UPDATE: "Update this item..."
, MODE_DELETE: "Delete this item..."
};
Well, it turns out IE8 has yet another problem. My code has a global variable (to the object) inside an object declaration that cannot be accessed by a function (that is also global).
The code is like so:
Code:
function myobject(params){
//public
this.initialize = function(){...}
//private
some variables...
//problem variable
var mouse = new Object()
mouse.x = 0;
mouse.y = 0;
//code...
slidecontainer = document.createElement("div");
slidecontainer.onmousemove = function(event) {
if(boo.isIE) {
e = window.event;
mouse.x = e.x + document.body.scrollLeft;
mouse.y = e.y + document.body.scrollTop;
} else {
e = event;
mouse.x = e.clientX + document.body.scrollLeft;
mouse.y = e.clientY + document.body.scrollTop;}}
//this function is in an interval
function moveslides() {
/* this is where I have the problem
It seems that the function doesn't recognize that mouse.x, or mouse for that matter, exists. Mouse is global to the object, so why can't this function access it?
*/if(mouse.x) {
code...
}}}
The page is at [URL] and works on every browser, including finnicky opera, except for ie. The full code is availabe when you right click and view the source on the page.
I have an object with a single Method to load content from a xml file. The problem is... how do I add a property to the object to store the data loaded?? I tryed adding a simple Array inside the object, but didn't work.
[Code]...
I'm having trouble accessing a custom property that I've created for an object. Does anyone see the problem with this code? this.imageSrcs is undefined inside of getImages.
Quote:
Gallery.prototype.imageSrcs = new Array();
Gallery.prototype.getImages = function(json) {
if (json) {
[code]...
I've been having this issue with Javascript that is just not getting resolved for a while. What I am basically doing is building a simple web browser extension that injects javascript on certain pages. I am using Firefox, Chrome and Safari. The issue I am having is accessing these so called "special properties" on a particular page. They look like the regular classNames, id, textContent and such but don't appear to be standard. It would be very helpful if I can access them.
A particular example would be in Yahoo Mail. When you are in your inbox you have list of messages. With each message row there are associated attributes. You can get to them with your web inspector or if you search for the div element with id "PagedTableView_wrapper", then follow the first child and then second child and you get a list of these messages being rendered. Each one of those rows has the regular className properties and such but also has "_checked", "_focused", "_selected" that look like custom Yahoo ones. I basically want to read those.
The issue is I can't. I always end up getting a null exception, as if it doesn't exist. I can read the className and the other standard ones fine, but not the special ones. (I've verified its the same element as well). I have tried the DOM navigation route with indexing, jQuery and XPATH, all with the same result. The weird part is that I can see them with the webInspector! Whats even more strange is that if I run firebug or commands in the Console, it actually works! But it doesn't work for my injected code/extension! Baffled.
This error ONLY occurs in IE. "Unexpected call to method or property access."
I pinpointed it to this line:
o.appendChild(e);
The full function is:
function aO(d, t, src, p, id ){
alert('aO has begun.');
var o, e, i;
if (!ie){ o = cE('object');o.data = src; }
else { o = cE('embed');o.src = src; } .....
I have WordPress installed in a directory of my website, and I'm using an iframe on the homepage to embed the blog. I'm using a javascript code that I found online to automatically resize the iframe based on the content inside of it. This is the code:
<script type="text/javascript">
function resizeIframe()
{[code]...
This works perfectly in Google Chrome. However, in Firefox I get this error in the console:
Error: Permission denied to access property 'document'
Source File: http://mysite.com/index1.html
Line: 24
I don't have any experience with javascript, but this makes no sense to me, because it should work since the iframe document is on the same domain and server as the parent page. The parent is[url]...." and the iframe document is [url].....Why is Firefox complaining about this? It shouldn't violate the "same origin policy" that I have read about.
I am simply trying to use a global variable in javascript, but can only access the variable on the second call. I can't find anything that relates to this through my searches. My application is supposed to query the server for XML that tells me which years and months are available to put into combo boxes. I want to store this xml in a global variable to access it later.
[Code]....
({}["toString"]) - function
alert("toString" in {}) - true
But I want to only find a property that is defined in the object - not in a prototype.
for(var prop in {}) { alert(prop); }; // toString not found.
It seems that operator 'in' is overloaded. 'in' during iteration: look in the property. 'in' in a boolean conditional: look in the object, then up the prototype chain.
I want a way to get only properties defined within the object itself, not it's prototype. Is there no simple way?
Is there some way to add a property to a object ?
Code JavaScript:
if (Object.__count__ == undefined)
{
Object.property.__count__ = function {
// [url]https://developer.mozilla.org/En/Core_JavaScript_1.5_Reference/Global_Objects/Object#section_8[/url]
count and return
}
}
Is there a way to determine the object that a property is in? For
example:
function MyClass() { ... }
MyClass.prototype.myFunc = function() { ... }
var obj = new MyClass();
var sameobj = SOMEFUNCTION(obj.myFunc);
So my goal is to get a reference to the object by just having the
property.
Some of the object properties in the Dojo Toolkit are set to objects but they are using syntax like this:
object.property = new function() {
this.property = someValue;
this.property = someFunction;
}
Is the property set to a new object and if so what is the "new function()" statment doing?
With something like this : <form name="a"><input name="name"></form>
Is it possible to get the name of the form (a) and access the input object
(name) too?
I have a JS script that presents a series of "pages" with different questions inside a single HTML file, by rewriting certain <div>s. I have an object like this that contains the questions and information about answer labels etc (the idea is that this should be easy to modify for someone who doesn't know JS):
[Code]...
I'm trying to figure out how to use a variable as a css property. For example: $('.name').animate({variable : 100}); I wrote up a quick example script. My goal is to switch the animation direction depending on the link that you click. Either have the object animate from the left or top. Any ideas how this could be done? Or why this isn't working as
[Code]...
anyone knows if you can add a property to a node through a variable. This is working with freemarker template's
for example:
Javascript
model.test = 'some text';
---- Freemarker template will have ----
${test}
--- this will print out "some text" on the screen ---
but what if i wanted to do something like (in theory)
var i = 'test'
model.getMethod[i] = 'some text'
i think im supposed to use getMethod but im not sure ?
I have situation that when my page is loaded i create js object
<html>
...
<script>
function Page() {
this.page = 0;
this.result = 0
this.resultCount =1;
this.currentPage =1;
}
MyPage= Page()
</script>
then in my javascript function i use object like this:
function getPage() {
if(!MyPage) {
MyPage = new Page();
}
return MyPage;
}
but there is one problem: MyPage lost one of the property, currentPage.
When i do alert(MyPage.cuurentPage) shows mi undefined. After object
initialization everything seems to be alright, currentPage is set to 1
but when i Try use MyPage in my js code is already set to undefined.
What happen? What I'm doing wrong?
Given the following code and its execution to the last line:
var re = /beta/;
var string = "alphabetagamma";
var report = re.exec(string);
should not:
re.lastIndex = 9;
after the last line of execution?
On Firefox, Venkman continually reports zero.
Specification for JS 1.5 defines property lastIndex as follows:
The index at which to start the next match.
As of JavaScript 1.5, [it is] a property of a
RegExp instance, not the RegExp object.
i am locking for something to get all Propertie`s of an Object (with an each loop?)
<div id="blub" class="blah" name="blah"></div>
<script>
$('div').attr(function(){
[code]....
[Code]...
How to know the div have position property or not?
I want to be able to set a property on a private object by giving the not notation path to the value. The difficulty is that this object is within closure so I can't access it directly to set the value the normal way (eg. dot.notation.path = 'new value'). This seems weird but I can't think of the obvious way.
Example:
// setter function
function set(path, change){
var privateObject = {
a: 'a',
[Code]....
I am doing javascript from a book called "Prentice Hall(which sounds very masonic) : Javascript by example".
my question is this. I am doing an practice dealing with "defining methods for an object" now i used this code verbatim
[Code]...
I did this code in the book exactly. I am just trying to warp my head around this and want to understand how is this an error when it is just the crating a new property.
I've ammended my code now so that I'm using objects, constructors and prototypes.
If I use the standard constructor.prototype.functionname = (){......} type of setup it works okay.
However I'm now experimenting with overwriting the prototype with a literal. As in the code below. i.e. constructor.prototype = {functionname : function() .......
Doing it this way my first new object instance fails. The subsequent new objects are fine.
I ran a check on the properties of the 1st object with '!hasOwnProperty and name in' and the result is that the prototype (or pointer to a prototype) is missing.
So the first new object of FontTrans (oH) has
Code:
1 property is Heading
.
.
9 property is Delay
[Code].....
I've created a small AJAX library for our application. We send the response data back as JSON in responseText. So far so good.
Before we invoke the response handler, I'm putting the eval'ed responseText in the request object like so:
Code:
req.respText = eval('(' + req.responseText + ')');
This works in FF but breaks in IE 6. (*gasp*)
I finally got the Microsoft Script Editor yesterday, so I could play with the values and see what was going on. Kind of... I'm still in the dark. For some reason, it won't let me add a property to req. Can anyone explain why/how it prevents me from doing so?
Conceivably I could add the eval'ed responseText to the response handler function, but that would break the API, and would require us to modify a bunch of existing functions.