Develop Reference

Get value from div to textbox

Is there a way to get the value from a div element to textbox?
My script codes
$(document).ready(function() {
barcode.setHandler(function(barcode) {
$('#result').html(barcode);
});
barcode.init();
I show the result with the following code
<div id="result"></div>
I fail to get the div value into the textBox.
<input type="text" id="result">

To achieve expected result, use below option
Avoid using same id for multiple elements , instead of that use class or two different ids or use one as class and for other use as id
$(document).ready(function() {
console.log( $('#result').text())
$('.result').val( $('#result').text());
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="result">1222</div>
<input type="text" class="result">
code sample - https://codepen.io/nagasai/pen/yjomXp

Ids need to be unique on a given page; your input and div both have the same id. To insert from the div to the input, first get the text inside the div, then apply that to the input using .val().
const foo = $('#foo').text();
$('#bar').val(foo);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="foo">
This is inside the div
</div>
<input type="text" id="bar"></input>

Why isn't jQuery append method working when passing parent class to add a child input?

I want to append a duplicate of an input box in a parent box. Here is my HTML structure:
<div class="reading-group input-group">
<input type="text" placeholder="Enter Reading link" id="link">
</div>
+ Add another link
And here is my jQuery code:
function addPlaceholder(parentClass){
var placeHolder = $(parentClass).children().eq(0);
$(parentClass).append(placeHolder);
console.log(placeHolder);
}
$('.add-reading-btn').click(function(){
addPlaceholder('.reading-group');
});
Here is the jsfiddle link: https://jsfiddle.net/abhishekraj007/kexe6gxn/
What am I doing wrong?

Your code is taking the existing <input> element and moving it from the <div> and back into the <div>, so it looks like nothing is happening. If you .clone() the element and then .append() it, a new element will be added.
Here is a working example:
function addPlaceholder(parentClass) {
var placeHolder = $(parentClass).children().eq(0).clone();
$(parentClass).append(placeHolder);
console.log(placeHolder);
}
$('.add-reading-btn').click(function() {
addPlaceholder('.reading-group');
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="reading-group input-group">
<input type="text" placeholder="Enter Reading link" id="link">
</div>
+ Add another link
If you want to add focus to your <input> element on load, you can do so by adding this line to the bottom of your code:
$('#link').focus();
If you want to add focus to the new element on creation, as well as give it an empty value rather than copying the prior element's value, add this line to the end of your addPlaceholder() function:
$(placeHolder).val("").focus();

you can just add the .clone() method of jquery to create a clone of the textbox like below . You were only referring to the same element not the cloned html before.
$(document).ready(function(){
function addPlaceholder(parentClass){
var placeHolder = $(parentClass).children().eq(0).clone();
$(parentClass).append(placeHolder);
//console.log(placeHolder);
}
$('.add-reading-btn').click(function(){
addPlaceholder('.reading-group');
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="reading-group input-group">
<input type="text" placeholder="Enter Reading link" id="link">
</div>
+ Add another link
Here is a working fiddle
https://jsfiddle.net/kexe6gxn/2/

Hidding TextBox in html

I have some text boxes in html which takes value from database based upon that value i want to hide that particular text box i.e if the value is null the text box disappear please help.Searched a lot but still confused as i want that function to run automatically so can't use on-click or on-change method. I have function that check for the value weather that value is null or not then i set that value to the text box. Found a method of changing the type of text box but not working.
readonly>

Hide
You could just do this. Im just setting the visibility to hidden to completely hide it.
<!DOCTYPE html>
<html>
<body>
<textarea id="myP">This is a textarea.</textarea>
<button type="button" onclick="myFunction()">Hide content of textarea</button>
<script>
function myFunction() {
document.getElementById("myP").style.visibility = "hidden";
}
</script>
</body>
</html>
Toggle
Now if you want to toggle you just add another function!
<!DOCTYPE html>
<html>
<body>
<textarea id="myP">This is a textarea.</textarea>
<button type="button" onclick="hide()">Hide content of textarea</button>
<button type="button" onclick="show()">Show content of textarea</button>
<script>
function hide() {
document.getElementById("myP").style.visibility = "hidden"
}
function show() {
document.getElementById("myP").style.visibility = "visible"
}
</script>
</body>
</html>

Changing Background and Foreground with linked css in html

I have looked literally everywhere. The goal is to
Use the classes in the stylesheet to set color and background
For example, class selector colorA will set the text color to color ‘A’
Change the color of the text by changing the class of the div with id foreground
Change the background color by changing the class of the div with id background.
I was able to change it by manually entering the color, but when I try to change it by getting className it fails.
Here is my code Ive tried several different things with no luck, please help:
JavaScript:
function changeBG(col) {
var x = document.getElementsByTagName("DIV")[0];
x.backgroundColor = (col);
}
HTML:
<body>
<div class="holder">
<div id="background" class="backgroundC">
<div id="foreground" class="colorE">
<p>
Lorem ipsum </p>
</div>
</div>
</div>
<div class="holder">
<table>
Foreground <INPUT type="button" value="A" class = "colorA" name="button3" onClick= "document.fgColor= 'colorA'">
<INPUT type="button" value="A" class = "colorB" name="button3" onClick="document.fgColor='.colorB'">
Background <INPUT type="button" value="B" class = "backgroundA" name="button3" onClick="document.bgColor = '.backgroundA'">
<INPUT type="button" value="B" class = "backgroundB" name="button3" onClick= changeBG(document.getElementsByClassName("backgroundB"))>
</table>
</div>
CSS Stylesheet:
.colorA {
color: #4581cf;
}
.colorB {
color: #B7E2FF;
}
.backgroundA {
background-color: #4581cf;
}
.backgroundB {
background-color: #B7E2FF;
}

Try this
Make sure you are passing correct class nam
function changeBG(col) {
var x = document.getElementsByTagName("DIV")[0];
x.className=col;
}

changeBG's first parameter is wrong.
in w3c getElementsByClassName method definition
The getElementsByClassName() method returns a collection of all elements in the document with the specified class name, as a NodeList object
in html code, click event binding
onClick= changeBG(document.getElementsByClassName("backgroundB"))
in js, click event handler
x.backgroundColor=col;
col object is a collection of elements have class attribute containing 'backgroundB'.
backgroundColor is a element property, set with color value. ex) #f3f3f3
You can fix it like this.
x.className = "background" + col[0].value; //col[0] is the input element classfied 'backgroudB'. col[0].value equals 'B'
The className property sets or returns the class name of an element.

Using JQuery.
Create a new form and then copy this code and paste it, you will notice how specific div in specific class color can be changed easily.
<html>
<head>
<title>The Selecter Example</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js">
</script>
<script type="text/javascript" language="javascript">
$(document).ready(function() {
$(".big, #div3").css("background-color", "yellow");
});
</script>
</head>
<body>
<div class="big" id="div1">
<p>This is first division of the DOM.</p>
</div>
<div class="medium" id="div2">
<p>This is second division of the DOM.</p>
</div>
<div class="small" id="div3">
<p>This is third division of the DOM</p>
</div>
</body>
</html>

Use the CKEDITOR.replace() method to replace a dynamic <textarea> element with CKEditor

I have followed this threads:
how to open reply form under comments div;
Ck editor is not working after putting it in innerHTML to replace a div with the Ckeditor textarea
CKeditor with multible dynamic textareas
as a foundation in building a simple blog commenting application. The simple HTMl layout is shown below:
I am using the jQuery .toggle() function to hide, show the hidden comment form with jQuery.
I am also using the parent(); children() and next() jquery methods to traverse the DOM and select the textarea element of the displayed form so as to assign the 'name attribute' to it.
I then wish to replace the dynamic (textarea name="content") with a CKEditor instance.
However, when I toggle the comment form, (the name="content") attribute is assigned, but what appears is a simple textarea not with ckeditor enabled on it.
How can I make each new dynamically created textareas use CKeditor?
Note that when I hardcode the name='content' attribute value pair into any of the text areas, that textarea is converted into a rich text editor.
<div>
<div>
Some message over here
</div>
<div style = "height:10px;"> <a class="reply" id="myHeader1" href="javascript:showonlyone('newboxes1');" >Reply</a></div>
</div>
<div class ="replymsgbox" id="newboxes1">
<form id="frmComment" novalidate="novalidate" method="POST" name="frmComment">
<textarea id="comment_text" class=""></textarea>
</form>
</div>
<div>
<div>
Some message over here
</div>
<div style = "height:10px;"> <a class="reply" id="myHeader2" href="javascript:showonlyone('newboxes2');" >Reply</a></div>
</div>
<div class="replymsgbox" id="newboxes2">
<form id="frmComment" novalidate="novalidate" method="POST" name="frmComment">
<textarea id="comment_text" class="" ></textarea>
</form>
</div>
#Assign name attribute and toggle the comment form
<script src="views/js/jquery-1.11.2.min.js" type="text/javascript"></script>
<script type="text/javascript">
function showonlyone(thechosenone) {
$('.replymsgbox').each(function(index) {
if ($(this).attr("id") == thechosenone) {
$(this).show(200);
}
else {
$(this).hide(600);
}
});
}
</script>
<script type="text/javascript">
$('a.reply').on("click", function(e){
$(this).parent("div").parent("div").next("div").children('form').children('textarea').attr( "name", "content" );
});
</script>
#Adding CKEditor to my Page
<script src="libraries/ckeditor/ckeditor.js"></script>
<script type="text/javascript">
$(document).ready(function() {
if(CKEDITOR)
{
// Replace the <textarea name = "content"> with a CKEditor instance.
CKEDITOR.replace('content');
}
});
</script>