Constructor Parameter List For DOM Objects?
Jul 9, 2011
I'm looking for the constructor parameter list for DOM Objects. I was able to find a constructor for Option but none of the others.
Code:
myForm = new Form(params);
myForm.elements.push = new Select(params);
myForm.elements[0].options.push = new Option('Select this!','1');
This is a lot cleaner than
Code:
myForm = document.createElement('form');
myForm.setAttribute('name','theForm');
....
Where I can find a list of these constructor parameters?
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Jun 12, 2011
I have a code set up something like this:
[Code]....
The problem is I keep getting an error along the lines of: TypeError: Result of expression 'house' [[object Object]] is not a constructor. It seemed to work when I wasn't passing the other objects as parameters in the constructor. I just created and assigned them later. As in:
[Code]...
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Aug 26, 2004
I have a link that i'd like to add a url parameter onto the end and would like to get the value of the url parameter from a selected item in a drop down list box.
<a href="118.phprecordid99=??????" target="_blank" class="links">View</a>
The drop down list box name is combo1. I'm not sure how to reference all this. Is it possible?
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Mar 29, 2010
I want to set opacity parameter value before calling: $('x').animate({opacity:1},v1);
of course, other than setting a switch case line for each possible expected value.
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Apr 9, 2010
I was wondering how you would list multiple variables after a equal ==?
Example....
if ( pathname == schoolinformation, chaplainchatter)
$('#button_newspress_archive,#button_tech_college,#button_parent_portal,#button_transition_portal,#button_6th_form,#button_connect,#button_vacancies,#button_vle_login').css('display', 'none');
$('#school_information_sub').css('display', 'block');
if ( pathname != schoolinformation, chaplainchatter)
$('#school_information_sub').css('display', 'none');
Or even list multiple URL's within the variables?
Example
....
var schoolinformation = '/st-paul-s-website/school-information/school-news/headteachers-headlines', '/st-paul-s-website/school-information/school-news/chaplain-chatter-headlines';
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Feb 25, 2011
I hava sortable list using jQuery UI Sortable. When the items are re-ordered the new order is written to the database. All working fine � however, if I use jquery to add a new item ....
[Code]..
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Jul 16, 2009
[URL] When I clone a list that is part of a Sortable, the Draggable objects are not bound to the cloned list, only the original one.
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Apr 17, 2011
Is there a way in Javascript or Jquery to return an array of all objects underneath a certain point, ie. the mouse position. Basically, I have a series of images which link to various web pages but I have a large semi transparent image positioned over the top of the other images. I want to find the href of the background image that the mouse pointer clicks over.
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Sep 5, 2009
Is there a better way to extend object with internal objects?
$.fn.bestShow = function(s) {
var d = {
width: 0,
height: 0,
order: "numeric",
orderBy: "",
[Code]...
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Jul 20, 2005
I am trying to figure out what the constructors for the Image object are.
I have figured out that in IE and Mozilla, the Image object, and the
HTMLImageElement are the same, from a property perspective at least, but
what is the constructor for the Image object?
I know that I can call the following constructors, but are there others?
Image()
Image(int x, int y)
I could not find any actual spec for this.
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Dec 4, 2010
So our companies cms is quite javascript heavy. In an attempt to make it leaner I'm attempted to put all of our javascripts into as few files as possible, and compressed. For our form validation I've using the qforms library which consists of many files. Putting them into 1 file with all the other scripts and I receive the error "Field is not a constructor" Here's the piece of code creating the error.
Code: this[field] = new Field(o, field, this._name);
[Code]...
I would be getting this error?
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Nov 23, 2005
Why this backward way is so often used for constructors:
myConstructor = function() { /*empty placeholder*/ }
// and then:
myConstructor.prototype.methodOne = function() {...}
myConstructor.prototype.methodTwo = function() {...}
instead of right away:
function myConstructor() {
this.methodOne = function() {...}
this.methodTwo = function() {...}
}
Is it just a tradition or is it a workaround of some problem I'm not
aware of?
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Apr 30, 2010
what's the point of using x.constructor.prototype? (highlighted in red) why not directly use x.prototype. classname to check whether 'classname' property is in this class?
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Jan 26, 2005
Can you pass an array reference to a constructor? I don't know if it's because the syntax is screwy or it's impossible, but the following doesn't work.
// row constructor with array called fields
function RowObject(fields)
{
this.fields=new Array();
this.fields=fields;
}
row=new RowObject(fields);
alert(row.fields[0])
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Feb 9, 2010
I need to detect the "name" of the constructor of an object. For example, myArray.constructor === Array is true, but I want something where that === 'Array' is true. I've heard of Object.constructor.name, but it's not widely compatible. (preferably without involving regular expressions)?
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Mar 20, 2010
I am trying to understand why I had an error, or why my solution worked. In my HTML I had:
<script language="JavaScript" type="text/javascript" src="Book.js"></script>
<script language="JavaScript" type="text/javascript" src="Book_TEST.js"></script>
Book.js said:
[Code]....
Now, the code worked fine in both script. (i.e., no more error.) So far as I can tell, the only differences between the first and next version of Book.js are the comments and the whitespace. Am I missing something? Can the comments or whitespace somehow effect the logic with which this code has been executing? If I get an error like this again, is there an easier/better way to fix it than to essentially retype the code?
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Jul 9, 2010
How to extend the constructor for the date object of the javasccript so that whenever a call is made to the constructor, I want to perform a particular action? Basically how to define wrappers for default javascript methods or objects like Date() so that I can perform some action and then invoke the original method? So basically if I have something like var a = new Date(); I want it to (say) alert the value of the date everything Date() is called and then execute the default date constructor.
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Mar 29, 2010
I have a class constructor, and after the constructor a prototype method associated with that class. I'm trying to call that method from within the class constructor, but it causes an error, indicating that the method is not a property of the class.Is it not possible to access prototype methods from within the constructor? If it IS possible, how do I do it?
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Jul 2, 2010
Trying to create an object in Javascript (for Appcelerator/Titanium).The "object" is defined like this:
function server () {
this.cacheimages = 0;
this.login = "";
[code]....
In the same file, in another function when I run this line: var server = new server(); I get the error Result of expression 'server' is not a constructor.I have tried it with and without the "return" line, neither work.
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Jan 6, 2011
I'm not sure why this: Code: console.log(instance2.getAnotherKey()()); returns Object { a = "a" } when I clearly reassigned the value of the a property. Reassigning the property caused change in this line:
Code:
ref.a = 'abc'; console.log(inst.getZ()); //Object {a="abc"} So why does it work when you call an instance method in the constructor (e.g. this.getZ()) but doesn't work when you call the instance method in prototype?
[Code]...
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Mar 23, 2011
I have a requirement to override the constructor of a javascript class. I have to execute the current constructor code and then call a javascript method. Basically, I need to execute a javascript method whenever an object of that particular class is created in addition to whatever is being done now. I do not want to copy and paste the current constructor code and override the initcomponent method. I am looking for an alternative for that.
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Jan 1, 2011
I need to create a constructor for a computer object. This object must have three properties: speed, and mem_live mem_dead. Then I need to create a new object using this constructor and then have its properties displayed on the screen.Look at what I'm up to so far:
function Computer(speed, mem_live, mem_dead)
{
this.speed = speed;
[code]....
It always just shows : 4.0ghz, true, false
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Aug 8, 2005
function show() {
var s = '' ;
for (var i = 0; i<arguments.length; s += '
'+arguments[i++]) ;
typeof(window) != 'undefined' ? window.alert(s) : WScript.Echo(s) ;
}
function f(){}
show('delete(f):',delete(f)) ; // false
g = function(){} ;
h = new g() ;
show('h:',h) ; // [object Object]
show('delete(g):',delete(g)) ; // true
show('h.constructor:',h.constructor) ; // function(){}
show('delete(h.constructor):',delete(h.constructor )) ; // true
show('h.constructor:',h.constructor) ; // function(){}
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Dec 3, 2005
is there a delete for a object inside the constructor, while i init it?
i will try something like that:
var obj = function(a)
{
if (!a) delete this;
this.a = a;
}
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Jul 20, 2005
Sorry, bad title. Anyway, is there a way to pass the arguments to an object
instantiated via a constructor using the arguments object and have it
expanded, so to speak, so that it doesn't appear as a single argument? I'm
sorry, this explanation is just atrocious, but I can't think of exactly how
to word it. Maybe an example...
Take for instance Function.apply. It takes 1-2 arguments, the first being
the object to use as the context, and the second being either an array or an
instance of the arguments object which are to be the arguments for the
function. I want to do something similar but I want to also basically use
the new operator so that I get back an object.
Here's a snippet of some of my code, maybe this will help:
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Sep 30, 2011
I have an assignment where one piece of it needs to have the first name, last name, area code, and phone number when prompted by a function, once that info is had, it then needs to use the constructor function that is there to process the data and lastly use the data to output it with a show function. I have it to work with static information, but cant seem to figure what I am missing or how to make the prompt function information to feed to the constructor, I know when using the static variable it uses "new Function" but that seems to be my problem, I am stuck.
see the code below:
<!DOCTYPE html PUBLIC "-W3CDTD XHTML 1.0 TransitionalEN" "http:www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http:www.w3.org/1999/xhtml">
<head>
[Code]....
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