jQuery: how to change tag name?
For example:
<tr>
$1
</tr>
I need
<div>
$1
</div>
Yes, I can
Create DOM element <div>
Copy tr content to div
Remove tr from dom
But can I make it directly?
PS:
$(tr).get(0).tagName = "div";
results in DOMException.
You can replace any HTML markup by using jQuery's .replaceWith() method.
example: http://jsfiddle.net/JHmaV/
Ref.: .replaceWith
If you want to keep the existing markup, you could use code like this:
$('#target').replaceWith('<newTag>' + $('#target').html() +'</newTag>')
No, it is not possible according to W3C specification: "tagName of type DOMString, readonly"
http://www.w3.org/TR/DOM-Level-2-Core/core.html
Where the DOM renameNode() Method?
Today (2014) no browser understand the new DOM3 renameNode method (see also W3C)
check if run at your bowser: http://jsfiddle.net/k2jSm/1/
So, a DOM solution is ugly and I not understand why (??) jQuery not implemented a workaround?
pure DOM algorithm
createElement(new_name)
copy all content to new element;
replace old to new by replaceChild()
is something like this,
function rename_element(node,name) {
var renamed = document.createElement(name);
foreach (node.attributes as a) {
renamed.setAttribute(a.nodeName, a.nodeValue);
}
while (node.firstChild) {
renamed.appendChild(node.firstChild);
}
return node.parentNode.replaceChild(renamed, node);
}
... wait review and jsfiddle ...
jQuery algorithm
The #ilpoldo algorithm is a good start point,
$from.replaceWith($('<'+newname+'/>').html($from.html()));
As others commented, it need a attribute copy ... wait generic ...
specific for class, preserving the attribute, see http://jsfiddle.net/cDgpS/
See also https://stackoverflow.com/a/9468280/287948
The above solutions wipe out the existing element and re-create it from scratch, destroying any event bindings on children in the process.
short answer: (loses <p/>'s attributes)
$("p").wrapInner("<div/>").children(0).unwrap();
longer answer: (copies <p/>'s attributes)
$("p").each(function (o, elt) {
var newElt = $("<div class='p'/>");
Array.prototype.slice.call(elt.attributes).forEach(function(a) {
newElt.attr(a.name, a.value);
});
$(elt).wrapInner(newElt).children(0).unwrap();
});
fiddle with nested bindings
It would be cool to copy any bindings from the at the same time, but getting current bindings didn't work for me.
To preserve the internal content of the tag you can use the accessor .html() in conjunction with .replaceWith()
forked example: http://jsfiddle.net/WVb2Q/1/
Inspired by ericP answer, formatted and converted to jQuery plugin:
$.fn.replaceWithTag = function(tagName) {
var result = [];
this.each(function() {
var newElem = $('<' + tagName + '>').get(0);
for (var i = 0; i < this.attributes.length; i++) {
newElem.setAttribute(
this.attributes[i].name, this.attributes[i].value
);
}
newElem = $(this).wrapInner(newElem).children(0).unwrap().get(0);
result.push(newElem);
});
return $(result);
};
Usage:
$('div').replaceWithTag('span')
Working pure DOM algorithm
function rename_element(node, name) {
let renamed = document.createElement(name);
Array.from(node.attributes).forEach(attr => {
renamed.setAttribute(attr.name, attr.value);
})
while (node.firstChild) {
renamed.appendChild(node.firstChild);
}
node.parentNode.replaceChild(renamed, node);
return renamed;
}
You could go a little basic. Works for me.
var oNode = document.getElementsByTagName('tr')[0];
var inHTML = oNode.innerHTML;
oNode.innerHTML = '';
var outHTML = oNode.outerHTML;
outHTML = outHTML.replace(/tr/g, 'div');
oNode.outerHTML = outHTML;
oNode.innerHTML = inHTML;
To replace the internal contents of multiple tags, each with their own original content, you have to use .replaceWith() and .html() differently:
http://jsfiddle.net/kcrca/VYxxG/
JS to change the tag name
/**
* This function replaces the DOM elements's tag name with you desire
* Example:
* replaceElem('header','ram');
* replaceElem('div.header-one','ram');
*/
function replaceElem(targetId, replaceWith){
$(targetId).each(function(){
var attributes = concatHashToString(this.attributes);
var replacingStartTag = '<' + replaceWith + attributes +'>';
var replacingEndTag = '</' + replaceWith + '>';
$(this).replaceWith(replacingStartTag + $(this).html() + replacingEndTag);
});
}
replaceElem('div','span');
/**
* This function concats the attributes of old elements
*/
function concatHashToString(hash){
var emptyStr = '';
$.each(hash, function(index){
emptyStr += ' ' + hash[index].name + '="' + hash[index].value + '"';
});
return emptyStr;
}
Related fiddle is in this link
Since replaceWith() didn't work for me on an element basis (maybe because I used it inside map()), I did it by creating a new element and copying the attributes as needed.
$items = $('select option').map(function(){
var
$source = $(this),
$copy = $('<li></li>'),
title = $source.text().replace( /this/, 'that' );
$copy
.data( 'additional_info' , $source.val() )
.text(title);
return $copy;
});
$('ul').append($items);
Take him by the word
Taken the Question by Word "how to change tag name?" I would suggest this solution:
If it makes sense or not has to be decided case by case.
My example will "rename" all a-Tags with hyperlinks for SMS with span tags. Maintaining all attributes and content:
$('a[href^="sms:"]').each(function(){
var $t=$(this);
var $new=$($t.wrap('<div>')
.parent()
.html()
.replace(/^\s*<\s*a/g,'<span')
.replace(/a\s*>\s*$/g,'span>')
).attr('href', null);
$t.unwrap().replaceWith($new);
});
As it does not make any sense to have a span tag with an href attribute I remove that too.
Doing it this way is bulletproof and compatible with all browsers that are supported by jquery.
There are other ways people try to copy all the Attributes to the new Element, but those are not compatible with all browsers.
Although I think it is quite expensive to do it this way.
Jquery plugin to make "tagName" editable :
(function($){
var $newTag = null;
$.fn.tagName = function(newTag){
this.each(function(i, el){
var $el = $(el);
$newTag = $("<" + newTag + ">");
// attributes
$.each(el.attributes, function(i, attribute){
$newTag.attr(attribute.nodeName, attribute.nodeValue);
});
// content
$newTag.html($el.html());
$el.replaceWith($newTag);
});
return $newTag;
};
})(jQuery);
See : http://jsfiddle.net/03gcnx9v/3/
Yet another script to change the node name
function switchElement() {
$element.each(function (index, oldElement) {
let $newElement = $('<' + nodeName + '/>');
_.each($element[0].attributes, function(attribute) {
$newElement.attr(attribute.name, attribute.value);
});
$element.wrapInner($newElement).children().first().unwrap();
});
}
http://jsfiddle.net/rc296owo/5/
It will copy over the attributes and inner html into a new element and then replace the old one.
$(function(){
$('#switch').bind('click', function(){
$('p').each(function(){
$(this).replaceWith($('<div/>').html($(this).html()));
});
});
});
p {
background-color: red;
}
div {
background-color: yellow;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p>Hello</p>
<p>Hello2</p>
<p>Hello3</p>
<button id="switch">replace</button>
You can use this function
var renameTag = function renameTag($obj, new_tag) {
var obj = $obj.get(0);
var tag = obj.tagName.toLowerCase();
var tag_start = new RegExp('^<' + tag);
var tag_end = new RegExp('<\\/' + tag + '>$');
var new_html = obj.outerHTML.replace(tag_start, "<" + new_tag).replace(tag_end, '</' + new_tag + '>');
$obj.replaceWith(new_html);
};
ES6
const renameTag = function ($obj, new_tag) {
let obj = $obj.get(0);
let tag = obj.tagName.toLowerCase();
let tag_start = new RegExp('^<' + tag);
let tag_end = new RegExp('<\\/' + tag + '>$');
let new_html = obj.outerHTML.replace(tag_start, "<" + new_tag).replace(tag_end, '</' + new_tag + '>');
$obj.replaceWith(new_html);
};
Sample code
renameTag($(tr),'div');
Try this one also. in this example we can also have attributes of the old tag in new tag
var newName = document.querySelector('.test').outerHTML.replaceAll('h1', 'h2');
document.querySelector('.test').outerHTML = newName;
<h1 class="test">Replace H1 to H2</h1>
I have a dropdown that is filled by a database and everything works well. However I want to pass a parameter to php based on the value of the dropdown which I can do. If I force the var to have a particular number it gets the corresponding item in the database. I'm having a problem to get the value of a dropdown. I've tried all the suggestions here in the forum and nothing works in this particular area of my code. I have it working on another piece of my code but not on this particular one and I don't know why. Here is my code:
<select id="servicos" onChange="return selectServ();">
<option value="item" class="itemoption">Serviço</option>
This is the code that is not working:
function selectServ() {
var e = document.getElementById("servicos");
var idserv = e.options[e.selectedIndex].value;
$.getJSON("http://ib.esy.es/gestao/_php/servicos_threadingpreco.php", { serv: idserv }, null).then(function(data) {
console.log(data);
var tr = data
for (var i = 0; i < data.length; i++) {
var tr = $('<tr/>');
// Indexing into data.report for each td element
$(tr).append("<td>" + data[i].preco + "</td>");
$('.table1').append(tr);
}
});
}
If I put
var idserv = "1"
It is working, however this:
var e = document.getElementById("servicos");
var idserv = e.options[e.selectedIndex].value;
Is not getting a value. The console log gives:
selectdynamicpreco.html:76 Uncaught TypeError: $(...).value is not a function
You should consider using jQuery to get the value of the dropdown:
$('#dropdown').val() will give you the selected value of the drop down element. Use this to get the selected options text.
$("#dropdown option:selected").text();
Should get you the text value of the dropdown.
This is working on another piece of the code
<script>
function selectCat(){
$('#servicos').change(function() {
$('#demo').text($(this).find(":selected").text());
});
//for textbox use $('#txtEntry2').val($(this).find(":selected").text());
var e = document.getElementById("categoria");
var servSelected = e.options[e.selectedIndex].value;
var url = "";
var items="";
if(servSelected === "1"){
url = "http://ib.esy.es/gestao/_php/servicos_threading.php";
}
if(servSelected === "2"){
url = "http://ib.esy.es/gestao/_php/servicos_sobrancelhas.php";
}
if(servSelected === "3"){
url = "http://ib.esy.es/gestao/_php/servicos_manicure.php";
}
$.getJSON(url,function(data){
$.each(data,function(index,item)
{
items+="<option value='"+item.ID+"'>"+item.servico+"</option>";
});
$("#servicos").html(items);
});
};
</script>
Using jQuery load html forms dynamically using append function. Here the following code load the page content dynamically based on number times of values on while loop.
Here I have a struggle on load the content with different values.its working with single value of 0 or 1 on var load_with_value=0; but not on both simultaneously i.e. increment the load_with_value++ for again load the page content of HTML forms.
$(document).ready(function(e) {
$("<DIV>").load("<?php echo $url; ?>", function() //url for loading page
{
var n = $('.item').length + 1; //load the html page content
var i = 1; //iteration for number of times load the content
var count = 2; //check the condition
var load_with_value = 0; //load the page content with different values for display different values on html form
while(i<count) { //loop starts
$("#product").append($(this).html());
i++;
load_with_value++;
}
});
});
First of all let's do some proper code formatting and get rid of the incorrect comments:
$(document).ready(function(e) {
$("<DIV>").load("<?php echo $url; ?>", function() {
var n = $('.item').length + 1;
var i = 1;
var count = 2;
var load_with_value = 0;
while(i<count) {
$("#product").append($(this).html());
i++;
load_with_value++;
}
});
});
Now let's take it apart:
If you want to use a temporary element to store the loaded data you need to assign it to a variable, so instead of
$("<DIV>").load("<?php echo $url; ?>", function() {
do
var tempObject = $("<div/>").load("<?php echo $url; ?>", function() {
Afterwards you can append the temporary element to an existing one with $('#someExistingElement').append(tempObject).
If you want to load the content into an existing element you should use it's ID, class or other selector to do this - not $("<div>").. If you want to load it to all div elements (please don't) then it should be $("div").
Next var n = $('.item').length + 1; makes no sense. It is never used in the code.
While cycle in this case is unnecessary. Don't use while cycles if you don't have to. You can use:
for(var i=0; i<count; i++){
//code
}
What is var load_with_value = 0; used for? I can only see you incrementing it with load_with_value++; but you don't use it anywhere..
Finally if you want to load different content based on the incremented variable it should be done outside of the .load function.. For example
$(document).ready(function(){
for(var i=0; i<5; i++){
$('#container-' + i).load('/somecontent-' + i + '.html');
}
});
This loads the content /somecontent-0.html to /somecontent-4.html into container elements with IDs container-0 to container-4 respectively.
function getPublicLink() {
var div = document.getElementById('links'); // anchor tag
var url;
for(var x in div){
url += div[x].href;
}
}
This is for getting the list. My Problem is that I want to compare it with the json results below. If there is a matched. I will alter the anchor tag to remove the href attribute or make the text Connected ( Now it is "Invited"). The Linkedin connection code is:
function displayConnections(connections) {
var members = connections.values;
var publicUrl;
for(var member in members) {
publicUrl += members[member].publicProfileUrl;
}
}
My problem is they are in a big string. What i want is to compare them one by one. I'm out of ideas since I'm just a JS beginner. Thanks for your input!
I've found the answer.
for(var i in publicUrl) {
for(var j in url) {
if(url[j] === publicUrl[i]) {
alert("Found " + url[j]);
}
}
}
Let's say I have this PHP variables :
$SelectedCountry = "USA";
$SelectedState = "Texas";
on the other hand, I have this javascript function to display all available countries and states :
function print_country(country_id){
// given the id of the <select> tag as function argument, it inserts <option> tags
var option_str = document.getElementById(country_id);
option_str.length=0;
option_str.options[0] = new Option('Where do you live now?','');
option_str.selectedIndex = 0;
for (var i=0; i<country_arr.length; i++) {
option_str.options[option_str.length] = new Option(country_arr[i],country_arr[i]);
}
}
function print_state(state_id, state_index){
var option_str = document.getElementById(state_id);
option_str.length=0; // Fixed by Julian Woods
option_str.options[0] = new Option('Select state','');
option_str.selectedIndex = 0;
var state_arr = s_a[state_index].split("|");
for (var i=0; i<state_arr.length; i++) {
option_str.options[option_str.length] = new Option(state_arr[i],state_arr[i]);
}
}
my question is... how to make 'USA' and 'Texas' becomes selected <option> which generated by those two javascript functions? thanks.
NOTE #1 : you can see the complete code of javascript here : http://sourceforge.net/projects/countries/files/
NOTE #2 : those function called by adding this line on my PHP :
<script type="text/javascript" src="scripts/countries.js"></script>
<script language="javascript">print_country("country");</script>
so basically I need your help how to pass that PHP variables so that it can be 'received' by javascript function INSIDE that countries.js file.
One way is to just echo out some JavaScript statements:
<script>
<?php
echo "
var SelectedCountry = '$SelectedCountry';
var SelectedState = '$SelectedState';
";
?>
</script>
Then just use them in your loops to check if the option needs to be selected or not.
If you're going to be doing a lot of this sort of thing, though, embedding PHP into JavaScript isn't really the best approach. Read up on AJAX and PHP's json_encode() function.
There are two answers:
1 Use AJAX cal and pass back JSON
$.ajax({
url: '/myScript.php',
success: function(data) {
//Do something
}
});
myScript.php
return json_encode($myVar);
2 Embed PHP into the JavaScript
<script>
var myPHPVariable = <?php echo $myVar; ?>
</script>