Develop Reference

Get values and ids of all span elements inside form

I am trying to get all span elements inside the form. The span elements are turning into input text fields and become editable. When you click away they are turning back into span elements. I will attached fiddle live example.
I gave it a go but the problem is that I am getting both ids but only value of the first span element.
Here is my html:
<span name="inputEditableTest" class="pztest" id="inputEditableTest" data-editable="">First Element</span>
<span name="inputEditableTest2" class="pztest" id="inputEditableTest2" data-editable="">Second Element</span>
<input id="test" type="submit" class="btn btn-primary" value="Submit">
And here is JavaScript with jQuery:
$('body').on('click', '[data-editable]', function () {
var $el = $(this);
var name = $($el).attr('name');
var value = $($el).text();
console.log(name);
var $input = $('<input name="' + name + '" id="' + name + '" value="' + value + '"/>').val($el.text());
$el.replaceWith($input);
var save = function () {
var $p = $('<span data-editable class="pztest" name="' + name + '" id="' + name + '" />').text($input.val());
$input.replaceWith($p);
};
$input.one('blur', save).focus();
});
$("#test").on('click', function(){
var ok = $("span")
.map(function () {
return this.id;
})
.get()
.join();
var ok2 = $("#" + ok).text();
alert(ok);
alert(ok2);
//return [ok, ok2];
});
Here is the fiddle https://jsfiddle.net/v427zbo1/3/
I would like to return the results as an array example:
{element id : element value}
How can I read ids and values only inside specific form so something like:
<form id = "editableForm">
<span id="test1">Need these details</span>
<span id="test2">Need these details</span>
<input type="submit">
</form>
<span id="test3">Don't need details of this span</span>
Lets say I have got more than 1 form on the page and I want JavaScript to detect which form has been submitted and grab values of these span elements inside the form
I will be grateful for any help

$("#test").on('click', function(){
var result = {};
$("span").each(function (k, v) {
result[v.id] = v.innerHTML;
});
alert(JSON.stringify(result));
//return [ok, ok2];
});
Here is an example: https://jsfiddle.net/v427zbo1/4/
Container issue:
You should use this selector: #editableForm span if you want to get all the divs inside this container.
$("#editableForm span").each(function (k, v) {
result[v.id] = v.innerHTML;
});
But if you want to get only first-level children elements then you should use this selector: #editableForm > span
Example with getting all the spans inside #editableForm container: https://jsfiddle.net/v427zbo1/9/
If you want to have several forms, then you can do like this:
$('form').on('submit', function(e){
e.preventDefault();
var result = {};
$(this).find('span').each(function (k, v) {
result[v.id] = v.innerHTML;
});
alert(JSON.stringify(result));
//return [ok, ok2];
});
Example with two forms: https://jsfiddle.net/v427zbo1/10/

You can't use .text to return the value of multiple elements. It doesn't matter how many elements are selected, .text will only return the value of the first one.
Virtually all jQuery methods that return a value behave this way.
If you want to get an array of values for an array of matched elements, you need another map. You also need to join the strings with , # as you're producing something along the lines of #id1id2id3 instead of #id1, #id2, #id3:
var ok = $("span").map(function () {
return this.id;
}).join(', #')
var ok2 = $("#" + ok).map(function () {
return $(this).text();
});
That said, you're already selecting the right set of elements in your first map. You pass over each element to get its ID, you already have the element. There is no reason to throw it away and reselect the same thing by its ID.

If I got you right following code will do the job
var ok = $("span")
.map(function () {
return {id: $(this).attr('id') , value: $(this).text()};
}).get();
Check this fiddle.

Jquery reading input field that was created from JSON loop

I cannot figure out for the life of me why this will not work. I am trying to pull the value of a textfield that was created with a loop from a json file.
In this code, at the very bottom I just do a simple click(function() {alert()} just to see if I can pull a value and its returning undefined. But if I remove '#name' and put in 'input' it captures it, but only for the first of several input fields.
Any help is really appreciated
JSON
{
"Controls": [{
"Button":[{ "Name":"Button", "x": "1","y": "2","width": "3","height": "4","Transition":"" }],
"Image":[{"x": "5","y": "6","width": "7","height": "8"}],
"TextField":[{"x": "9","y": "10","width": "11","height": "12","Rows":""}]
}]
}
The Code(there is soome getJSON stuff above this)
//Slide In Attributes Panel Based on Selected Object
$(document).on('click', '#code li', function () {
var index = $('#code li').index(this);
var selected = $(this).text();
switch (selected) {
case selected:
$('#options').hide();
hidePanels();
$('#temp').remove();
$('#objectAttributes').show("slide", 200);
break;
//If it does work show what variable is being used
default:
alert(selected);
break;
}
//Shows Selected LI Index
$('#codeIndex').text("That was div index #" + index);
//Pull list of Attributes for selected Object
$.getJSON('controls.json', function (data) {
//Build Attributes List
var attributeList = '<div id="temp">';
//Target based on selected object
var target = selected;
attributeList += '<div>' + target + '<div>';
$.each(data.Controls[0][target][0], function (kk, vv) {
attributeList += '<div style="float:right">' + kk + ':' + '<input type="text" id='+ kk + '>' + '</input>' + '</div>';
});
attributeList += '</div></div>';
attributeList += '</div>';
$('#objectAttributes').append(attributeList);
$('#temp').append('<div id="editIndex">'+"Modifying index" + " " +index+'</div>');
$(document).on('click', '#saveAttributes', function () {
var $x = $('#name').val();
alert($x);
})
});
});

Ok, so after a little hacking around with a jsfiddle the answer turned out to be a lot simpler than I first thought. Ever since HTML 4.01 class names and IDs have been case sensitive (reference), which means that your selector $('#name') wasn't matching the JSON Name.
So a simple change, such as in this simplified jsfiddle seems to work as desired. Hopefully this helps!

How to get the value of id of innerHTML?

I have created a html like this:
<body onload = callAlert();loaded()>
<ul id="thelist">
<div id = "lst"></div>
</ul>
</div>
</body>
The callAlert() is here:
function callAlert()
{
listRows = prompt("how many list row you want??");
var listText = "List Number";
for(var i = 0;i < listRows; i++)
{
if(i%2==0)
{
listText = listText +i+'<p style="background-color:#EEEEEE" id = "listNum' + i + '" onclick = itemclicked(id)>';
}
else
{
listText = listText + i+ '<p id = "listNum' + i + '" onclick = itemclicked(id)>';
}
listText = listText + i;
//document.getElementById("lst").innerHTML = listText+i+'5';
}
document.getElementById("lst").innerHTML = listText+i;
}
Inside callAlert(), I have created id runtime inside the <p> tag and at last of for loop, I have set the paragraph like this. document.getElementById("lst").innerHTML = listText+i;
Now I am confuse when listItem is clicked then how to access the value of the selected item.
I am using this:
function itemclicked(id)
{
alert("clicked at :"+id);
var pElement = document.getElementById(id).value;
alert("value of this is: "+pElement);
}
But getting value as undefined.
Any help would be grateful.

try onclick = itemclicked(this.id) instead of onclick = 'itemclicked(id)'

Dude, you should really work on you CodingStyle. Also, write simple, clean code.
First, the html-code should simply look like this:
<body onload="callAlert();loaded();">
<ul id="thelist"></ul>
</body>
No div or anything like this. ul and ol shall be used in combination with li only.
Also, you should always close the html-tags in the right order. Otherwise, like in your examle, you have different nubers of opening and closing-tags. (the closing div in the 5th line of your html-example doesn't refer to a opening div-tag)...
And here comes the fixed code:
<script type="text/javascript">
function callAlert() {
var rows = prompt('Please type in the number of required rows');
var listCode = '';
for (var i = 0; i < rows; i++) {
var listID = 'list_' + i.toString();
if (i % 2 === 0) {
listCode += '<li style="background-color:#EEEEEE" id="' + listID + '" onclick="itemClicked(this.id);">listItem# ' + i + '</li>';
}
else {
listCode += '<li id="' + listID + '" onclick="itemClicked(this.id);">listItem# ' + i + '</li>';
}
}
document.getElementById('thelist').innerHTML = listCode;
}
function itemClicked(id) {
var pElement = document.getElementById(id).innerHTML;
alert("Clicked: " + id + '\nValue: ' + pElement);
}
</script>
You can watch a working sample in this fiddle.
The problems were:
You have to commit the id of the clicked item using this.id like #Varada already mentioned.
Before that, you have to build a working id, parsing numbers to strings using .toString()
You really did write kind of messy code. What was supposed to result wasn't a list, it was various div-containers wrapped inside a ul-tag. Oh my.
BTW: Never ever check if sth. is 0 using the ==-operator. Better always use the ===-operator. Read about the problem here
BTW++: I don't know what value you wanted to read in your itemClicked()-function. I didn't test if it would read the innerHTML but generally, you can only read information from where information was written to before. In this sample, value should be empty i guess..
Hope i didn't forget about anything. The Code works right now as you can see. If you've got any further questions, just ask.
Cheers!

You can pass only the var i and search the id after like this:
Your p constructor dymanic with passing only i
<p id = "listNum' + i + '" onclick = itemclicked(' + i + ')>
function
function itemclicked(id)
{
id='listNum'+i;
alert("clicked at :"+id);
var pElement = document.getElementById(id).value;
alert("value of this is: "+pElement);
}
is what you want?

I am not sure but shouldn't the onclick function be wrapped with double quotes like so:
You have this
onclick = itemclicked(id)>'
And it should be this
onclick = "itemclicked(id)">'
You have to modify your itemclicked function to retrieve the "value" of your p element.
function itemclicked( id ) {
alert( "clicked at :" + id );
var el = document.getElementById( id );
// depending on the browser one of these will work
var pElement = el.contentText || el.innerText;
alert( "value of this is: " + pElement );
}
demo here

the javascript template and the event handling

I have asked a question about how to avoiding to write the html in the js,then some people tell me using the javascript template,for example,the jquery/template pugin and ect.
It is a good idea when generate static html,for example:
<ul id="productList"></ul>
<script id="productTemplate" type="text/x-jquery-tmpl">
<li><a>${Name}</a> (${Price})</li>
</script>
<script type="text/javascript">
var products = [
{ Name: "xxx", Price: "xxx" },
{ Name: "yyy", Price: "xxx" },
{ Name: "zzz", Price: "xxx" }
];
// Render the template with the products data and insert
// the rendered HTML under the "productList" element
$( "#productTemplate" ).tmpl( products )
.appendTo( "#productList" );
</script>
However when I try to bind some event to the generated html,I meet some problem.
For example,I have a page which user can search some products by the price/name/location.
So I have three function:
searchByPrice(lowPrice,highPrice,productType,currentPage)
searchByName(name,productType,currentPage);
searchByLocation(location,currentpage);
ALl the above function have a realated method in the server side and they will retrun the products usint the xml format.
Since they will retrun so many items,so I have to paging them,the "currengPage" is used to tell the server side which part of results should be returned.
When the client get the result from the server side,now it is the js for display them int he div and create a Paging Bar if possible.
Before I know the template,I use this manner(which I hate most,try my best to avoid):
function searchByPrice(lowPrice,highPrice,productType,currentPage){
var url="WebService.asmx/searchByPrice?low="+lowPrice="&high="+highPrice+"&curPage="+currentPage;
//code to create the xmlHttp object
xmlhttp.open("GET",url,true);
xmlhttp.onreadystatechange=function(){
if (xmlhttp.readyState==4 && xmlhttp.status==200){
var i=0;
var Prohtml="";
var proList=parseProductList(xmlhttp.responseText);
for(i=0;i<prolist.length;i++){
Prohtml+="<li><a href='#'>"+prolist[i].name+"</a> ("+prolist[i].price"+)</li>";
}
//generate the paging bar:
var totleResult=getTotleResultNumber(xmlhttp.responseText);
if(totleResult>10){
var paghtml="<span>";
//need the paging
var pagNum=totleResult/10+1;
for(i=1;i<=pagenum;i++){
paghtml+="<a onclick='searchByPrice(lowPrice,highPrice,productType,currentPage+1)'>i</a>";
//here the synax is not right,since I am really not good at handle the single or doule '"' in this manner.
//also if in the searchByName function,the click function here should be replaced using the searchByName(...)
}
}
}
}
}
In the example,it is easy to use the template to generate the "Prohtml" since there is no event handling with them,but how about the "paghtml",the click function is different in differnt search type.
So,any good idea to hanld this?

Either:
Create DOM Elements instead of building HTML strings, using document.createElement or a small library if you're doing lots of this, which will allow you to attach events immediately in the usual fashion.
or
Give each element which needs to make use of event handlers a unique ID and build up a list of events to be attached once the HTML has been inserted into the document.
E.g.:
var eventHandlers = []
, eventCount = 0;
for (i = 1; i <= pagenum; i++) {
var id = "search" + eventCount++;
html += "<a id='" + id + "'>" + i + "</a>";
eventHandlers.push([id, 'click',
handler(searchByPrice, lowPrice, highPrice, productType, currentPage + i)])
}
// Later...
someElement.innerHTML = html;
registerEvents(eventHandlers);
Where registerEvents is:
function registerEvents(eventHandlers) {
for (var i = 0, l = eventHandlers.length; i < l; i++) {
var eventHandler = eventHandlers[i],
id = eventHandler[0],
eventName = eventHandler[1],
func = eventHandler[2];
// Where addEvent is your cross-browser event registration function
// of choice...
addEvent(document.getElementById(id), eventName, func);
}
}
And handler is just a quick way to close over all the arguments passed in:
/**
* Creates a fnction which calls the given function with any additional
* arguments passed in.
*/
function handler(func) {
var args = Array.prototype.slice.call(arguments, 1);
return function() {
func.apply(this, args);
}
}
I use something like this approach (but automatically adding unique ids when necessary) in the HTML generation portion of my DOMBuilder library, which offers a convenience method for generating HTML from content you've defined, inserting it into a given element with innerHTML and registering any event handlers which were present. Its syntax for defining content is independent of output mode, which allows you to switch between DOM and HTML output seamlessly in most cases.

First of all, you can simply use the $.get() or $.ajax() for your AJAX call.
Secondly, you can use .live() or .delegate() to bind events to elements that do not exist.
Thirdly, you can use the data attributes in the anchor elements as a way to pass in the arguments for the event handler, see .data().
So, to rewrite your function, you have may something like the following:
function searchByPrice(event) {
$this = $(this);
var lowPrice = $this.data('lowPrice'),
highPrice = $this.data('lowPrice'),
productType = $this.data('productType'),
currentPage = $this.data('currentPage');
var url = "WebService.asmx/searchByPrice?low=" + lowPrice = "&high=" + highPrice + "&curPage=" + currentPage;
$.get(url, function(data, textStatus, jqXHR) {
var i = 0;
var Prohtml = "";
var proList = parseProductList(data);
for (i = 0; i < prolist.length; i++) {
Prohtml += "<li><a href='#'>" + prolist[i].name + "</a> (" + prolist[i].price "+)</li>";
}
//generate the paging bar:
var totleResult = getTotleResultNumber(data);
if (totleResult > 10) {
var paghtml = "<span>";
//need the paging
var pagNum = totleResult / 10 + 1;
for (i = 1; i <= pagenum; i++) {
paghtml += '<a class="pagelink" ' +
'data-lowPrice="' + lowPrice + '" ' +
'data-highPrice="' + highPrice + '" ' +
'data-productType="' + productType + '" ' +
'data-currentPage="' + (currentpage + 1) + '">' + i + '</a>';
//here the synax is not right,since I am really not good at handle the single or doule '"' in this manner.
//also if in the searchByName function,the click function here should be replaced using the searchByName(...)
}
}
});
}
$(document).ready(function(){
$("a.pagelink").live('click', searchByPrice);
});

How do you dynamically create a radio button in Javascript that works in all browsers?

Dynamically creating a radio button using eg
var radioInput = document.createElement('input');
radioInput.setAttribute('type', 'radio');
radioInput.setAttribute('name', name);
works in Firefox but not in IE. Why not?

Taking a step from what Patrick suggests, using a temporary node we can get rid of the try/catch:
function createRadioElement(name, checked) {
var radioHtml = '<input type="radio" name="' + name + '"';
if ( checked ) {
radioHtml += ' checked="checked"';
}
radioHtml += '/>';
var radioFragment = document.createElement('div');
radioFragment.innerHTML = radioHtml;
return radioFragment.firstChild;
}

Based on this post and its comments:
http://cf-bill.blogspot.com/2006/03/another-ie-gotcha-dynamiclly-created.html
the following works. Apparently the problem is that you can't dynamically set the name property in IE. I also found that you can't dynamically set the checked attribute either.
function createRadioElement( name, checked ) {
var radioInput;
try {
var radioHtml = '<input type="radio" name="' + name + '"';
if ( checked ) {
radioHtml += ' checked="checked"';
}
radioHtml += '/>';
radioInput = document.createElement(radioHtml);
} catch( err ) {
radioInput = document.createElement('input');
radioInput.setAttribute('type', 'radio');
radioInput.setAttribute('name', name);
if ( checked ) {
radioInput.setAttribute('checked', 'checked');
}
}
return radioInput;
}

Here's an example of more general solution which detects IE up front and handles other attributes IE also has problems with, extracted from DOMBuilder:
var createElement = (function()
{
// Detect IE using conditional compilation
if (/*#cc_on #*//*#if (#_win32)!/*#end #*/false)
{
// Translations for attribute names which IE would otherwise choke on
var attrTranslations =
{
"class": "className",
"for": "htmlFor"
};
var setAttribute = function(element, attr, value)
{
if (attrTranslations.hasOwnProperty(attr))
{
element[attrTranslations[attr]] = value;
}
else if (attr == "style")
{
element.style.cssText = value;
}
else
{
element.setAttribute(attr, value);
}
};
return function(tagName, attributes)
{
attributes = attributes || {};
// See http://channel9.msdn.com/Wiki/InternetExplorerProgrammingBugs
if (attributes.hasOwnProperty("name") ||
attributes.hasOwnProperty("checked") ||
attributes.hasOwnProperty("multiple"))
{
var tagParts = ["<" + tagName];
if (attributes.hasOwnProperty("name"))
{
tagParts[tagParts.length] =
' name="' + attributes.name + '"';
delete attributes.name;
}
if (attributes.hasOwnProperty("checked") &&
"" + attributes.checked == "true")
{
tagParts[tagParts.length] = " checked";
delete attributes.checked;
}
if (attributes.hasOwnProperty("multiple") &&
"" + attributes.multiple == "true")
{
tagParts[tagParts.length] = " multiple";
delete attributes.multiple;
}
tagParts[tagParts.length] = ">";
var element =
document.createElement(tagParts.join(""));
}
else
{
var element = document.createElement(tagName);
}
for (var attr in attributes)
{
if (attributes.hasOwnProperty(attr))
{
setAttribute(element, attr, attributes[attr]);
}
}
return element;
};
}
// All other browsers
else
{
return function(tagName, attributes)
{
attributes = attributes || {};
var element = document.createElement(tagName);
for (var attr in attributes)
{
if (attributes.hasOwnProperty(attr))
{
element.setAttribute(attr, attributes[attr]);
}
}
return element;
};
}
})();
// Usage
var rb = createElement("input", {type: "radio", checked: true});
The full DOMBuilder version also handles event listener registration and specification of child nodes.

Personally I wouldn't create nodes myself. As you've noticed there are just too many browser specific problems. Normally I use Builder.node from script.aculo.us. Using this your code would become something like this:
Builder.node('input', {type: 'radio', name: name})

My solution:
html
head
script(type='text/javascript')
function createRadioButton()
{
var newRadioButton
= document.createElement(input(type='radio',name='radio',value='1st'));
document.body.insertBefore(newRadioButton);
}
body
input(type='button',onclick='createRadioButton();',value='Create Radio Button')

Dynamically created radio button in javascript:
<%# Page Language=”C#” AutoEventWireup=”true” CodeBehind=”RadioDemo.aspx.cs” Inherits=”JavascriptTutorial.RadioDemo” %>
<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
<html xmlns=”http://www.w3.org/1999/xhtml”>
<head runat=”server”>
<title></title>
<script type=”text/javascript”>
/* Getting Id of Div in which radio button will be add*/
var containerDivClientId = “<%= containerDiv.ClientID %>”;
/*variable count uses for define unique Ids of radio buttons and group name*/
var count = 100;
/*This function call by button OnClientClick event and uses for create radio buttons*/
function dynamicRadioButton()
{
/* create a radio button */
var radioYes = document.createElement(“input”);
radioYes.setAttribute(“type”, “radio”);
/*Set id of new created radio button*/
radioYes.setAttribute(“id”, “radioYes” + count);
/*set unique group name for pair of Yes / No */
radioYes.setAttribute(“name”, “Boolean” + count);
/*creating label for Text to Radio button*/
var lblYes = document.createElement(“lable”);
/*create text node for label Text which display for Radio button*/
var textYes = document.createTextNode(“Yes”);
/*add text to new create lable*/
lblYes.appendChild(textYes);
/*add radio button to Div*/
containerDiv.appendChild(radioYes);
/*add label text for radio button to Div*/
containerDiv.appendChild(lblYes);
/*add space between two radio buttons*/
var space = document.createElement(“span”);
space.setAttribute(“innerHTML”, “ &nbsp”);
containerDiv.appendChild(space);
var radioNo = document.createElement(“input”);
radioNo.setAttribute(“type”, “radio”);
radioNo.setAttribute(“id”, “radioNo” + count);
radioNo.setAttribute(“name”, “Boolean” + count);
var lblNo = document.createElement(“label”);
lblNo.innerHTML = “No”;
containerDiv.appendChild(radioNo);
containerDiv.appendChild(lblNo);
/*add new line for new pair of radio buttons*/
var spaceBr= document.createElement(“br”);
containerDiv.appendChild(spaceBr);
count++;
return false;
}
</script>
</head>
<body>
<form id=”form1″ runat=”server”>
<div>
<asp:Button ID=”btnCreate” runat=”server” Text=”Click Me” OnClientClick=”return dynamicRadioButton();” />
<div id=”containerDiv” runat=”server”></div>
</div>
</form>
</body>
</html>
(source)

for(i=0;i<=10;i++){
var selecttag1=document.createElement("input");
selecttag1.setAttribute("type", "radio");
selecttag1.setAttribute("name", "irrSelectNo"+i);
selecttag1.setAttribute("value", "N");
selecttag1.setAttribute("id","irrSelectNo"+i);
var lbl1 = document.createElement("label");
lbl1.innerHTML = "YES";
cell3Div.appendChild(lbl);
cell3Div.appendChild(selecttag1);
}

Quick reply to an older post:
The post above by Roundcrisis is fine, IF AND ONLY IF, you know the number of radio/checkbox controls that will be used before-hand. In some situations, addressed by this topic of 'dynamically creating radio buttons', the number of controls that will be needed by the user is not known. Further, I do not recommend 'skipping' the 'try-catch' error trapping, as this allows for ease of catching future browser implementations which may not comply with the current standards. Of these solutions, I recommend using the solution proposed by Patrick Wilkes in his reply to his own question.
This is repeated here in an effort to avoid confusion:
function createRadioElement( name, checked ) {
var radioInput;
try {
var radioHtml = '<input type="radio" name="' + name + '"';
if ( checked ) {
radioHtml += ' checked="checked"';
}
radioHtml += '/>';
radioInput = document.createElement(radioHtml);
} catch( err ) {
radioInput = document.createElement('input');
radioInput.setAttribute('type', 'radio');
radioInput.setAttribute('name', name);
if ( checked ) {
radioInput.setAttribute('checked', 'checked');
}
}
return radioInput;}

Patrick's answer works, or you can set the "defaultChecked" attribute too (this will work in IE for radio or checkbox elements, and won't cause errors in other browsers.
PS Full list of attributes you can't set in IE is listed here:
http://webbugtrack.blogspot.com/2007/08/bug-242-setattribute-doesnt-always-work.html

why not creating the input, set the style to dispaly: none and then change the display when necesary
this way you can also probably handle users whitout js better.

My suggestion is not to use document.Create(). Better solution is to construct actual HTML of future control and then assign it like innerHTML to some placeholder - it allows browser to render it itself which is much faster than any JS DOM manipulations.
Cheers.