Develop Reference

Display value in input in html

I have the following code for html:
<label for="">Input</label>
<input type="text" name="" id="input_01" placeholder="Enter some text">
<label for="">Output</label>
<input type="text" name="" id="ouput_01">
<script>
var input_01 = document.getElementById("input_01")
var output_01 = document.getElementById("output_01")
input_01.addEventListener('keyup',function(){
output_01.value = input_01.value
})
</script>
I want to display the input value as the output. However, I found that the command "output_01.value = input_01.value" doesn't work and there is nothing displayed. I do not know why and do not know how to solve this problem. How can I display the content of an input in 'ouput_01'? Thank you.

make sure you don't have typo in your code.
change from
<input type="text" name="" id="ouput_01">
to
<input type="text" name="" id="output_01">

your INPUT tag output ID does not match the one on your javascript DOM and this output_01.value = input_01.value is wrong, instead you should add event to your function parameter in your Event Listener then assign your event.target.value to your output DOM value
<label for="">Input</label>
<input type="text" name="" id="input_01" placeholder="Enter some text">
<label for="">Output</label>
<input type="text" name="" id="output_01">
<script>
var input_01 = document.getElementById("input_01")
var output_01 = document.getElementById("output_01")
input_01.addEventListener('keyup', function(event) {
output_01.value = event.target.value
})
</script>

How to remove css style on button click in javascript?

I have created an form in which I have made the input field disabled by default->
<input class="name" type="text" maxlength="50" value="Hritika Agarwal" disabled="" />
I want to make this editable on button click. So created a button like this ->
<button class="accept-btn" onclick="myFunction()">Edit</button>
function myFunction() {
document.getElementById("name").removeAttribute("disabled");
}
But It's not working.
I have even tried like this also->
function myFunction() {
document.getElementById("name").style.disabled = "false";
}
But again nothing happened.
How could I resolve this>

You use getElementById to find an element with the id name but there is not such thing. Use <input id="name" instead of class, then the first will work.
The second can not work, since disabled is not a style-property.

function myFunction() {
document.getElementsByClassName("name")[0].removeAttribute("disabled");
}
Or
<input class="name" id="name" type="text" maxlength="50" value="Hritika Agarwal" disabled="" />

if you want to select elemnt by class name use getElementsByClassName.
document.getElementsByClassName("name")[0].disabled = false;
If
select elemnt by id use getElementById.change input to
<input id="name" type="text" maxlength="50" value="Hritika Agarwal" disabled="" />
then
document.getElementById("name").disabled = false;

add dynamically generated fields from form

Hi guys i want to dynamically add a group of input fields when a button is pressed. This works with 1 group, but not with more than one. Here is my HTML:
<form action="address.php" method="POST">
<div id="list">
<input type="text" name="address" placeholder="Address">
<input type="text" name="suburb" placeholder="Suburb">
<input type="text" name="state" placeholder="State">
<input type="text" name="country" placeholder="Country">
<button id="addMore">Add Address</button>
</div>
</form>
I'm calling the addMore function with this javascript:
$(function(){
$("#addMore").click(function(e){
e.preventDefault();
$("#list").append("<input type="text" name="address" placeholder="Address"><input type="text" name="suburb" placeholder="Suburb"><input type="text" name="state" placeholder="State"><input type="text" name="country" placeholder="Country"><button id="addMore2">Add Address</button></div>");
});
});
I've added a button at the end with an id of addMore2 because i wanna generate a similar set of input controls but with different names. I want to call that id with this function:
$(function(){
$("#addMore2").click(function(e){
e.preventDefault();
$("#list").append("<input type="text" name="address2" placeholder="Address"><input type="text" name="suburb2" placeholder="Suburb"><input type="text" name="state2" placeholder="State"><input type="text" name="country2" placeholder="Country"><button id="addMore3">Add Address</button></div>");
});
});
... and then another set of controls with the function addMore3. Same as above, but with the number 3.
If i use each function alone, it works. But if i try to use all 3 together, it doesn't work. How can i dynamically reproduce a set of input controls with different names?

you could do something like this
$(var count = 0;
$("#addMore2").click(function(e){
e.preventDefault();
$("#list").append("<input type='text' name='address2'"+count+" placeholder="Address"><input type="text" name='suburb2'"+count+" placeholder="Suburb"><input type="text" name='state2'"+count+" placeholder="State"><input type="text" name='country2'"+count+" placeholder="Country"><button id='addMore3'"+count+">Add Address</button></div>");
count++;
});
});

#rayzor
You need to append your code before button
Please use below code:
jQuery("#addMore").click(function(e){
jQuery('<br><input type="text" name="address" placeholder="Address"><input type="text" name="suburb" placeholder="Suburb"><input type="text" name="state" placeholder="State"><input type="text" name="country" placeholder="Country">').insertAfter("input:last");
return false;
});
And remove code for $("#addMore2").click event

There's no need to add Addmore 2,3,etc manually. the js will add it automatically, as much as your want. Feel free to see this one: https://phppot.com/jquery/jquery-ajax-inline-crud-with-php/

HTML Button - How to dynamically change url content

I am trying to change values in a button's URI to input texts values.
<div class="numcontainer">
<input required="required" onchange="getNumber()" id="cnt" type="input" name="input" placeholder="ISD">
<input required="required" onchange="getNumber()" id="wano" type="input" name="input" placeholder="Enter number">
</div>
<button type="submit" name="gowa" id="btngo" onclick="location.href='myserver://send?phone=NumberPlaceHolder'">Go!</button>
NumberPlaceHolder: Trying to concatenate values enter in both input
JS:
function getNumber() {
document.getElementById('btngo').href.replace("NumberPlaceHolder",document.getElementById('cnt').value+document.getElementById('wano').value);
}
It does not work as expected. How can I solve this?

Just an alternative, it's cleaner
const getNumber =()=> {
let val =id=> document.querySelector(id).value
console.log('myserver://send?phone='+val('#cnt')+val('#wano'))
}
//console or location.href
<div class="numcontainer">
<input required id="cnt" type="text" placeholder="ISD">
<input required id="wano" type="number" placeholder="Enter number">
</div>
<input type="button" name="gowa" id="btngo" onclick="getNumber()" value="Go!">
onChange is quite unnecessary.

You cannot have a href attribute for a button. You need to change the onclick attribute here:
function getNumber(){
document.getElementById('btngo').setAttribute("onclick", document.getElementById('btngo').getAttribute("onclick").replace("NumberPlaceHolder", document.getElementById('cnt').value+document.getElementById('wano').value));
}
It's always better to have it split like this:
function getNumber(){
curOnclick = document.getElementById('btngo').getAttribute("onclick");
wanoValue = document.getElementById('cnt').value+document.getElementById('wano').value;
newOnclick = curOnclick.replace("NumberPlaceHolder", wanoValue);
document.getElementById('btngo').setAttribute("onclick", newOnclick);
}

You should use simple
instead of
<button type="submit" name="gowa" id="btngo" onclick="location.href='myserver://send?phone=NumberPlaceHolder'">Go!</button>
To change link use this:
document.querySelector('.start a').href = 'my-new-address'

Change your input type like this type="nummber" or type="text" for getting number or text only
<input required="required" onchange="getNumber()" id="cnt" type="nummber" placeholder="ISD">
<input required="required" onchange="getNumber()" id="wano" type="number" placeholder="Enter number">
You can add click event to your button like this.
function getNumber(){
document.getElementById("btngo").onclick = function() {
var ll = "myserver://sendphone="+document.getElementById('cnt').value+document.getElementById('wano').value;
console.log(ll); // checking url in console.
location.href = ll;
};
}

Duplicating HTML elements and the contents within in the HTML document

Suppose I have the following code:
<div id="Car1Container">
<label id="Car1YearLabel" for="Car1Year">Year</label>
<input id="Car1Year" name="Car1Year" type="text" maxlength="4" onfocus="FieldOnFocus(this)" onkeydown="FieldOnKeyDown(this)" onkeyup="FieldOnKeyUp(this)" onblur="FieldOnBlur(this)"/>
<label id="Car1MakeLabel" for="Car1Make">Make</label>
<input id="Car1Make" name="Car1Make" type="text" maxlength="15" onfocus="FieldOnFocus(this)" onkeydown="FieldOnKeyDown(this)" onkeyup="FieldOnKeyUp(this)" onblur="FieldOnBlur(this)"/>
<label id="Car1ModelLabel" for="Car1Model">Model</label>
<input id="Car1Model" name="Car1Model" type="text" maxlength="16" onfocus="FieldOnFocus(this)" onkeydown="FieldOnKeyDown(this)" onkeyup="FieldOnKeyUp(this)" onblur="FieldOnBlur(this)"/>
<button id="AddVehicleButton1" name="AddVehicleButton1" type="button" onclick="AddVehicle()">Add Vehicle</button>
</div>
<div id="Car2Container" style = "display: none;">
<label id="Car2YearLabel" for="Car2Year">Year</label>
<input id="Car2Year" name="Car2Year" type="text" maxlength="4" onfocus="FieldOnFocus(this)" onkeydown="FieldOnKeyDown(this)" onkeyup="FieldOnKeyUp(this)" onblur="FieldOnBlur(this)"/>
<label id="Car2MakeLabel" for="Car2Make">Make</label>
<input id="Car2Make" name="Car2Make" type="text" maxlength="15" onfocus="FieldOnFocus(this)" onkeydown="FieldOnKeyDown(this)" onkeyup="FieldOnKeyUp(this)" onblur="FieldOnBlur(this)"/>
<label id="Car2ModelLabel" for="Car2Model">Model</label>
<input id="Car2Model" name="Car2Model" type="text" maxlength="16" onfocus="FieldOnFocus(this)" onkeydown="FieldOnKeyDown(this)" onkeyup="FieldOnKeyUp(this)" onblur="FieldOnBlur(this)"/>
<button id="AddVehicleButton2" name="AddVehicleButton2" type="button" onclick="AddVehicle2()">Add Vehicle</button>
</div>
Currently, AddVehicle() just changes the Car2Container style to 'block'. I have a finite number of these and I want it to be dynamic. I have some code to attempt to write it to a page, but it erases everything on the page and doesn't really work.
I want to write an AddVehicle() function to duplicate the Car1Container and place it right below in the HTML document (except all the 1s become 2s). This is turning out to be quite a challenge! Can anyone help get me moving in the right direction?
Thanks!

You can use cloneNode(true) for cloning the block, then go through childNodes property to find all the children (maybe recursively) and replace their ids and names.
Added: Here's a working example:
var container = document.getElementById('Car1Container');
var copy = container.cloneNode(true);
container.parentNode.appendChild(copy);

The jQuery Clone() will do this rather nicely. Granted, it won't increase the ID's, but I'm not convinced it needs to. Just name the fields CarYear, CarMake etc. When the values are posted to the server, if you've duplicated three of the div's, they'll be comma-separated. If necessary, you could iterate through the items and change the id's manually.

I think the jquery clone function would be useful for this.

If you want to use jquery you can just do:
var index = 1;
function copycar(){
index++;
var $tmp = $("#Car1Container").clone();
$tmp.children().each(function(){
var oldID = $("this").attr("id");
var newId = oldId.substring(0,3)+index+oldId.substring(4);
$(this).attr("id", newId);
}
$("#Car1Container").after($tmp);
}

Without using jQuery, just raw JavaScript you could use insertAdjacentHTML.
Example:
document.getElementById(‘ID’).insertAdjacentHTML(position, markup)
where position can be "beforebegin", "afterbegin", "beforeend", or "afterend"
http://lionheart.sg/insertadjacenthtml/
This should be faster than the clone method in jQuery.