JQuery :: Detect What Type Of Tag/element Is Variable?
Feb 13, 2011
I have a variable that contains Form Elements. So these elements can be eitther a :text either a :check box See code below:
var currentValue = $(targetedInput).val() ? currentValue = $(targetedInput).val() : currentValue =$(targetedInput).is(':checked')
I was hopping that this line of code would assign a different value to currentValue depending on what kind of object i have. My idea was that If the current Object is a check bot it doesn t have a val attribute..
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Oct 22, 2009
What type of variable is an empty array element? I thought it was undefined, but i noticed that they have different behavior than undefined does:
var r=Array(1);
var s=r.concat([0,"",null,undefined]);
alert (s.toSource()) //==="[, 0, "", null, (void 0)]"
typeof s[0] //==="undefined"
typeof s[4] //==="undefined"
As you can see, 0 and 4 both === undefined. Yet, they don't have the same toSource()...
Is this special type named anything specific? Or more importantly, can it be detected outside of an array as being distinct from undefined? I am thinking this would be the same type as ({}).nonProp ...
I guess the question is actually, "can you tell the difference between uninitialized and undefined"?
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Feb 16, 2011
Using Jquery, and I'm trying to make a element positioned either from the top or bottom based on where it is in a grid.
Code JavaScript:
if (position.top+width > container_height) {
var position_type = "bottom";
} else {
var position_type = "top";
}
And then apply it like so
Code Javascript:
.css({position_type:position.top+padding,"left":position.left+7,"width":width,"height":width})
This isn't working.
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Jan 5, 2012
I have a questio about a selector.How must I type: all p elements that have an em element?
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Nov 30, 2011
$.browser is being deprecated however I still need to know what browser is hitting the page. In some cases I need to modify a layout or position an element by some pixels. The number of pixels is different for different browsers.How can I detect the browser using jQuery without using $.browser?
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May 21, 2009
how to set the 'type' of an html form element using jquery? is there something like?
$("element").type("password");
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Aug 27, 2010
So I've got a nested object that has this structure:
{"big_s":
{"s1":{"params":{"p1":"stuff","p2":stuff2"","p3":"stuff3"}},
"s2":{"params":{"p1":"stuff","p2":"stuff2","p3":"stuff3"}}
}
}
how would I go about removing one of the inner objects - s1 or s2? I've tried all sorts of ways but can't seem to get anything to remove an item from a jQuery object.
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Apr 11, 2011
[code]...
The above is a function I made to detect when a menu item is clicked on. The menu is made by using CSS on a ul tag's li children. Each li is a different menu item.
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Oct 19, 2010
Is there a way in jQuery to detect when a specific new element is inserted in the DOM?
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Jan 31, 2011
I have some legacy code that creates an image carousel and outputs AFTER the document head has been output - the CSS for this was being aded to a style block within the <body> which although worked is not compliant. I am trying to use jquery to set the css, but one part if failing. This is the original css :
#div_tab_one a:hover { .... }
#dic_tab_one .selected a {...}
How can I inject this css ? the selected class is set by some YUI code and rotates through the carousel setting/unsetting the "selected" class.
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Jun 29, 2009
I am trying to detect the DOM element on a unkown web page from thecurrent selected text on that page.Which means: I select text on a web page and then I would like to getthe dom element to which this text belongs.What I came up with was something like that: (imagin we selected theword John on that page....)var array = $("*:contains('John')"); ---> get all domelements that contain the text 'John'But, instead of returning all dom elements that contain 'John' , itreturns only the path from the HTML element to the P element thatcontains the text 'John'. (HTML->Body->P)Did I miss something ? Is there a complete different way to accomplish
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Dec 21, 2010
how do you detect if an element is visible when you use slideDown() and slideUp() to show/hide it?I have a question with five radio buttons; if no radio buttons are checked error msg displays
if (!$("input[@name='diagnosisHowLongAgo']:checked").val()) {
// display error msg;
}
[code]....
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Aug 8, 2006
Is it possible to change an element type with javacript for example onclick to change a text box to a hidden element or to a textarea?
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Oct 10, 2011
How to detect the smallest values the user inputs but does not explain how to detect already declared variables that have values in them and how to detect which of these declared variables has the smallest number.
For example:
double aA = 3.7;
double aB = 5.8;
double aC = 1.9;
double aD = 7.2;
double aMin;
// this is the variable I want the program to detect and stick
// the smallest variable into.
I want the code to detect the variable containing the smallest number and it has to be able to detect negative numbers as well.
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Feb 3, 2011
I've been looking at Eli's object.watch [URL] script and I understand the idea of it and what it does but I'm so confused about how I actually use it in my script! Even if this seems quite obvious to most, I'm just not seeing it I might even be trying the wrong approach to it entirely and object.watch isn't what I actually need to be using!I've got my script here:
Code JavaScript:
<script type="text/javascript">
jQuery.fn.elementlocation = function() {
[code].....
Now as you can tell, the server load will be pretty high with the mouse move constantly calling data from the fetch.php page through AJAX. SO, what I'm trying to do is only call upon the AJAX when the variable "block" changes it's value. So I assume, I have to somewhere store a value, and then when the value changes check it with the stored value, but of course, the stored value will always change to the new value too since it's all determined by constantly changing variables? So how would I get it to only call the AJAX section when the block number changes?
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Feb 13, 2011
i do have a problem in passing javascript variable to <input type=hidden value="">
here's my code:
<?php
while ($row = mysql_fetch_array($result))
{
?>
[code]....
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Aug 25, 2006
I am using the JS and HTML code below to check that required fields are
completed for attributes of a product. The first attribute is a select
menu and the second is a radio set. My JS goes through fine and detects
if the select menu isn't selected with a value, but I keep getting
'undefined' for the radio element type. I've almost pulled out half a
head of hair wondering why. Any experienced eyes see something I don't?
Code:
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Sep 28, 2010
I'm trying to find a way to change the CSS class for all my many input type elements with an onclick. Is this possible? The scenario I'm trying to fit it into is below (and condensed).
Ideally I'm looking to change the style for background-color onclick, black and white in particular (hoping that the solution would mean adding more colours later).
[Code]....
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May 10, 2010
I've a picture gallery with the images stored as variables in a javascript file like this:
var a100image10 = new mypicture("album1/a100image10.jpg");
var a100image11 = new mypicture("album1/a100image11.jpg");
I've a "next" button to show those images (one by one) in a div with this code:
document.getElementById('image').innerHTML = "<img src=images/gallery/"+eval(album+"image"+next+".getPath()")+"></img>";
where the eval function returns the path of the pictures.This works fine! but in IE I get an error saying a100image12 not defined (and image13, image14, etc), because that image is not in the javascript file.So, how can I test in advance if a variable exists in the file?? Note that I take the name of the next picture based on the current one.I mean,I take the current picture from the div, lets say a100image10, I add one, and I try to look in the file for the variable a100image11.
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Jul 23, 2005
How can I avoid type-conversion (object variable --> string) when
passing an object variable to a function?
Example:
-->
catch(myerrorobject)
alert(myerrorobject.filename);
{
my_function('bla: ',myerrorobject);
}
<---
I get the "myerrorobject.filename" in the alert-Box, but I get an
"undefined"-error, if I try to access myerrorobject.filename (or other
properties) in the function "my_function". Why?
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Jan 24, 2011
ok i don't know quite how to explain this so ill show two websites that implement it:[URL].. the news elements at the top of these pages, so when you highlight the news the picture comes up beside it, what is the name of this element, and are there any tutorials on how its made, or could anyone point me in a few directions so i can get started making one
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Aug 23, 2011
I have elements inside a div. I want to detect that when some clicks and drags the elements outside the div. I want the code to take that elements html code and take it out of the div but still on the page.that way when the person drags the element out of the div the element no longer belongs to the div.
I have elements for example like text or the <a> tag inside a div. everything is draggable. so you can drag the <a> tags . I want to detect if the user drags the <a> tags out of that div to take the <a> tag html code out of the div. So the element no longer is linked or the child of the div. I want it to become a parent of it's own. like right now when you drag the elements and then drag the div, the div will still move the <a> tag that is now displayed outside of the div. I want to break that link... and the same goes the other way around where if there is an <a> tag outside of the div and the user clicks and drags that <a> tag and puts it into a div it will become the divs child.
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May 6, 2009
I am trying to create an input element of type file using the javascript. I am able to create it but the problem i am facing is, i need to apply a CSS class to the control. Can some one let me know how to do the same.
I am pasting the code that i am using to create a control.
function AddUploadFile()
{
var newrow = document.getElementById("files_tbl").insertRow(document.getElementById("files_tbl").rows.length);
[Code].....
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Oct 21, 2011
I've coded in Java before but I'm still having some trouble. I am trying to draw a ribbon type shape on an <canvas> element and for some reason, when I turned it into a function, it seemed not to work. Here is what I have for drawing the ribbon with a function:
function drawRibbon(height,width,Canvas){
var c=document.getElementById(Canvas);
var cxt=c.getContext("2d");
cxt.fillStyle="#bb0044";
cxt.beginPath();
cxt.moveTo(0,0);
cxt.lineTo(0,height-50);
cxt.lineTo((width-20)/2,height-100);
cxt.lineTo((width-20),height-50);
cxt.lineTo(width-20,0);
cxt.shadowOffsetX = 5;
cxt.shadowOffsetY = 10;
cxt.shadowBlur=10;
cxt.shadowColor = "black";
cxt.fill();
cxt.shadowOffsetX = 0;
cxt.shadowOffsetY = 0;
cxt.shadowBlur=0;
cxt.closePath();
cxt.beginPath();
cxt.strokeStyle = "#ffcc22";
for (i=5;i <= 135; i=i+15){
cxt.moveTo(5,i);
cxt.lineTo(5,i+5);
cxt.stroke();
}}
drawRibbon(200,120,navCanvas);
I feel like it has something either to do with the function definition, or the call. Before this script is executed, i create a canvas in the following way:
<canvas id="navCanvas" height="200" width="120">
Why it is not displaying.
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May 26, 2010
I just donīt know the right syntax for this:
I want to change the css class of the li element from the name hidden to the variable filterVal, but i donīt know the right syntax.
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Feb 22, 2010
I need to add an event for all elements that are not text entry.I have tried this
$(':not(input:text, input:textarea)')
$(':not(:text, :textarea)')
I tried to get it to work for just not type=text
$(':not(:text)')
$(':not(input:text)')
I can't seem to figure it out.
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