Develop Reference

Cannot append to node

I have a the following html code in a table:
<td id="description">
<input id="newdescripion" value="VOIP/DATA" type="text">
<button type="button" id="removeinput">Remove</button>
</td>
When I click the button, I would like to empty the td and add the text which is stored in a cookie. The td empties fine but I am unable to append the text. The text is in the variable as it is visible in the alert. I have used the code below to try and achive this, the commented out code is what I have tried and doesn't work.
$(document).on('click', '#removeinput', function() {
var hostname = $('#hostname').text();
//alert(hostname);
var trid = $(this).closest('tr').attr('id');
//alert(trid);
var olddesc = Cookies.get(hostname+','+trid+',description');
alert(olddesc);
$(this).closest('td').empty(); <----- THIS WORKS
$(this).closest('td').append(olddesc);
// $(this).closest('tr').find('#description').text(olddesc);
// $(this).closest('td').text(olddesc);
// $('#'+trid+' td').each(function(){
// if($(this).attr('id') == 'description'){
// $(this).append(olddesc);
// }
// })
//$(document).find('#'+trid+' td#description').append(olddesc);
})
Can anyone please help me fix this or recommend a better way of doing it?

You can use .html() to add your dynamic data to HTML tag id
var olddesc = Cookies.get(hostname+','+trid+',description');
alert(olddesc);
// Create custom / dynamic HTML
var temp = `<p>` + olddesc + `</p>`;
$(this).closest('td').empty(); <----- THIS WORKS
// Edit: Use ID of html tag
$('#description').html(temp);
This shall work for you.

$(this).closest('td').append(olddesc); runs after you've removed this from the td, therefore the td is no longer an ancestor of this. You do not need to empty the td; simply set its text to olddesc and it will be automagically emptied as part of the process of setting its text.
// (REMOVE THIS) $(this).closest('td').empty(); <----- THIS WORKS
$(this).closest('td').text(olddesc);

Just use .html
$(document).on('click', '#removeinput', function() {
var hostname = $('#hostname').text();
var olddesc = "Cokkies return"; //Cookies.get(hostname+','+trid+',description');
$(this).closest('td').html(olddesc); //<----- THIS WORKS
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table>
<tr>
<td id="description">
<input id="newdescripion" value="VOIP/DATA" type="text">
<button type="button" id="removeinput">Remove</button>
</td>
</tr>
</table>

Changing input box also need to find check box checked or not in JS

I have input box along with checkbox in table <td> like below,
<td>
<input class="Comment" type="text" data-db="comment" data-id="{{uid}}"/>
<input type="checkbox" id="summary" title="Check to set as Summary" />
</td>
Based on check box only the content of input box will be stored in DB.
In the JS file, I tried like
var updateComment = function( eventData )
{
var target = eventData.target;
var dbColumn = $(target).attr('data-db');
var api = $('#api').val();
var newValue = $(target).val();
var rowID = $(target).attr('data-id');
var summary = $('#summary').is(':checked');
params = { "function":"updatecomments", "id": rowID, "summary": summary };
params[dbColumn] = newValue;
jQuery.post( api, params);
};
$('.Comment').change(updateComment);
But the var summary always returning false.
I tried so many ways prop('checked'),(#summary:checked).val() all are returning false only.
How to solve this problem?

Looks like you have multiple rows of checkboxes + input fields in your table. So doing $('#summary').is(':checked') will return the value of first matching element since id in a DOM should be unique.
So, modify your code like this:
<td>
<input class="Comment" type="text" data-db="comment" data-id="{{uid}}"/>
<input type="checkbox" class="summary" title="Check to set as Summary" />
</td>
And, instead of $('#summary').is(':checked'); you can write like this:
var summary = $(target).parent().find(".summary").is(':checked');
By doing this, we are making sure that we are checking the value of checkbox with the selected input field only.
Update: For listening on both the conditions i.e. when when checking checkbox first and then typing input box and when first typing input box and then checked:
Register the change event for checkbox:
// Whenever user changes any checkbox
$(".summary").change(function() {
// Trigger the "change" event in sibling input element
$(this).parent().find(".Comment").trigger("change");
});

You have missed the jQuery function --> $
$('#summary').is(':checked')
('#summary') is a string wrapped in Parentheses. $ is an alias for the jQuery function, so $('#summary') is calling jquery with the selector as a parameter.

My experience is that attr() always works.
var chk_summary = false;
var summary = $("#summary").attr('checked');
if ( summary === 'checked') {
chk_summary = true;
}
and then use value chk_summary

Change all the occurrences of
eventData
To
event
because event object has a property named target.
And you should have to know change event fires when you leave your target element. So, if checkbox is checked first then put some text in the input text and apply a blur on it, the it will produce true.

Use like this
var summary = $('#summary').prop('checked');
The prop() method gets the property value
For more details, please visit below link.
https://stackoverflow.com/a/6170016/2240375

Filter Table with JQuery using the “each” element

OK everybody, I hope you can help me. I have a problem with JQuery or better with the each selector of JQuery.
I have an example table, where I want to filter for special values which I entered before. Those values I got from my input field , store them in a variable, split the data an create an JQuery Object.
Well and then I think I have a problem with the selection, marked in the code section.
<p>
<input id="testyear" size="4" type="text">
<input value="Werte" onclick="getvalue()" type="button">
</p>
<script>
function getvalue() {
var wert = $('#testyear').val();
$("#years").find("tr").hide();
var data = this.value.split(" ");
// create jQuery Object
var jQueryObject = $("#years").find("tr");
// i think here is my error, i want to display only the object which are equal or better stored in my variable “wert”.
$.each(data, function (){
//jQueryObject = jQueryObject.filter(wert);
jQueryObject == wert;
});
jQueryObject.show();
};
<!--Example Table-->
<table id="years">
<tbody>
<tr>
<td>1997</td>
<td class="century">20</td>
</tr>
<tr>
<td>2001</td>
<td class="century">21</td>
</tr>
</tbody>
</table>
I expect, that when I enter 1997 in the inpt field, the whole tr which contains 1997 will be displayed. I know it is simple but I have no idea so thanks for your help.

Use a filter on the TR's after initially hiding them all.
e.g.
getvalue = function() {
var wert = $('#testyear').val();
// create jQuery Object
$("#years tr").hide().filter(function() {
return ~~$("td", this).first().text() >= wert;
}).show();
};
JSFiddle: https://jsfiddle.net/TrueBlueAussie/h8Lejfac/
Notes:
The ~~ is a little conversion to integer trick
You seem to have extra code you do not need in the example
Just get filter to return true for each item you want to keep and false for the rest
When using jQuery, avoid using inline event handlers (like onclick=). Use jQuery event handlers instead. See below:
e.g.
$('#wert').click(function() {
var wert = $('#testyear').val();
// create jQuery Object
$("#years tr").hide().filter(function() {
return ~~$("td", this).first().text() >= wert;
}).show();
});
JSFiddle: https://jsfiddle.net/TrueBlueAussie/h8Lejfac/1/

I think your problem is not in each() method (not selector). Your problem is here:
var data = this.value.split(" ");
this is not defined (you are not in an object scope). I think you need this:
var data = wert.split(" ");
-----------^^^^
You've obtain the value of wert in the last line.

Pass the value of html input text to Javascript Function and get the result

This is my very first time I'm using Javascript.
I have this Script:
<script type="text/javascript">
function baunilha()
{
var qb=document.getElementById("quantbaunilha").innerHTML;
var prbau=5.58;
var totbau=qtd*prbau;
}
document.getElementById("valorlinhab").innerHTML=baunilha();
</script>
And, this is how the Function is called:
<tr>
<td><img src="/imagens/DOB_Baunilha.PNG" style="vertical-align: middle" alt="Ima_Bau"> </td>
<td>Caixa de 42 Unidoses de Detergente Ultra-Concentrado aroma Baunilha</td>
<td><input id="quantbaunilha" name="quantbaunilha" value="0" maxlength="2" type="text" size="2" onchange="baunilha()"></td>
<td><input id="valorunib" name="valorunib" size="6" value="5.58">€</td>
<td><input id="valorlinhab" name="valorlinhab" size="8" value="0.00">€</td>
</tr>
So, I want that the result of the Function apears in text-box id="valorlinhab".
I tried the examples of w3schools, but they didn't work, as others examples in the web.
Is there someone who could help me? Any help is wellcome.
Thank you, in advance.

You need to be using value instead of innerHTML. Additionally, you are using "qtb" instead of "qb" in your calculation. You should also set the value inside the baunilha function. Finally, you must tie an event listener to the input so that it will call the javascript function.
I also added a line which would check if the input is actually a number.
function baunilha()
{
var qb=document.getElementById("quantbaunilha").value;
//check that quantbaunilha is a number
if(isNaN(parseFloat(qb)))
{
alert('Enter a number');
return;
}
var prbau=5.58;
document.getElementById("valorlinhab").value=qb*prbau;
}
document.getElementById("quantbaunilha").addEventListener('change', baunilha);
Here is a fiddle: http://jsfiddle.net/uLfcG/3/

You use innerHTML to put the results in to an element's inner HTML for a tag with both an opening and closing tag (like <p>).
Also, since you are using it for your onchange event, you should move the value setting in to the function as well.
For <input>, you set the value attribute instead:
<script type="text/javascript">
function baunilha() {
var qb=document.getElementById("quantbaunilha").value;
var prbau=5.58;
var totbau=qb*prbau;
document.getElementById("valorlinhab").value=totbau;
}
</script>
That should do the trick.
Here is a JSFiddle with a working example: http://jsfiddle.net/U7ZZh/
Also, you had a small typo on the line that is var totbau=qtb*prbau should be var totbau=qb*prbau

creating an inline update field using jquery

I've gotten stuck(again)
I have a table and one of the columns is a value that I want to be able to click, turn into an input field, then click again to change it back to just text.
I've gotten the first step done. It turns into an input field with a link to click and it uses the value that was previously in the td.
However, in writing the function to update the value and remove the input, I can't get it to fire at all. I've tried copying out the input field and hard coding that first step into the page and when I do that it does actually fire the click function. (I haven't finished writing this step as I wanted to get the function to fire first. Below is my code. Any help is overwhelmingly appreciated!
HTML:
<table>
<tr id="1"><td class="qty" set="0" >2</td></tr>
<tr id="2"><td class="qty" set="0" >2</td></tr>
<tr id="3"><td class="qty" set="0" >2</td></tr>
</table>
JQUERY:
$(".qty").click(function(){
var value = $(this).text();
var set =$(this).attr('set');
if (set==0){
$(this).html('<input type="text" name="quantity" value="'+value+'">update </span>');
$(this).attr('set', '1');
}
});
$(".update_qty").click(function(){
alert("using this to check if it's firing");
});

you need to use the live() function, otherwise the event won't be added to newly created elements.
$(".update_qty").live('click',function() {
alert("check if firing");
});

demo
http://jsfiddle.net/JEBaN/1/
some value
<br><br>
<a href='javascript:' id='toEdit'>To Edit Mode</a>
<a href='javascript:' id='toView'>To View Mode</a>​
jQuery(function(){
jQuery('#toEdit').click(_toEditMode);
jQuery('#toView').click(_toViewMode);
});
function _toEditMode()
{
var _elm=jQuery('.converter');
var _val= _elm.html();
_elm.html('<input type="text" value="'+_val+'" />');
}
function _toViewMode()
{
var _elm=jQuery('.converter');
var _val= _elm.find('input').val();
_elm.html(_val);
}
​

$(".update_qty").click(function(){
$("qty").html("<p>whatever text you want</p>");
});