Javascript concat clearing input fields - javascript

function js() {
document.getElementById("example").innerHTML = document.getElementById("example").innerHTML+"<input type=\"text\" name=\"name\" />";
}
<div id="example">
<input type="text" name="name[]" />
</div>
<button type="button" onclick="js();">Click</button>
I have a form, which need variable number of input types.
<form action="" method="">
[...]
<div id="mezok">
<div id="input_id">
<input type="text" name="name" />
</div>
</div>
[...]
</form>
I add and remove further inputs (along with their divs!) via an ajax call. Javascript calls a php which generates a new input_id div, and then concatenates to the rest of the div id="mezok". Adding and removing inputs are fine as long as everything is empty. However, when I add a new div when there is something in the input, it clears the rest of the inputs.
document.getElementById("mezok").innerHTML = document.getElementById("mezok").innerHTML+http.responseText;
document.getElementById("mezok").innerHTML += http.responseText;
document.getElementById("mezok").innerHTML.concat(http.responseText);
(The last one is not working at all...)
TL;DR: concat input to input, values of inputs disappear. :'(

Don't use innerHTML. What you are doing is redrawing the entire container contents, deleting existent inputs and creating new inputs each time. My experience says that when you are accessing innerHTML, recheck your code as you are probably doing something weird.
What you have to do is to create inputs individually and append them to the container, without touching the rest of the inputs. Is like appending elements to an array.
This way the code is more self-explanatory, and better, is way more performant:
function js() {
var input = document.createElement("input"); // Create a new input element. Is like "<input>".
input.setAttribute("type", "text"); // Set the 'type' attribute to 'text'. Is like having '<input type="text">'
input.setAttribute("name", "name[]"); // Set the 'name' attribute to 'name[]'. Is like having '<input name="name[]">' but because you already have set the type, now is like having '<input type="text" name="name[]">'
document.getElementById("example").appendChild(input); // Push it to the container
}
<div id="example">
<input type="text" name="name[]" />
</div>
<button type="button" onclick="js();">Click</button>

The code below could be a solution for you. In this way you're not going to overwrite the existing inputs with the associated values while you're adding new inputs.
function js() {
var inputElementToAppend = document.createElement('input');
inputElementToAppend.innerHTML = "<input type=\"text\" name=\"name\" />";
document.getElementById("example").appendChild(inputElementToAppend.firstChild);
}
<div id="example">
<input type="text" name="name[]" />
</div>
<button type="button" onclick="js();">Click</button>
Let me know if this worked for you.

Following working fine for me.
<button onclick="myFunction()">Try it</button>
<p id="demo">ABC</p>
<script>
function myFunction() {
var x = document.getElementById("myP").innerHTML;
document.getElementById("demo").innerHTML += `<input type=\"text\" name=\"name\" />`;
}
<script>
I would recommend to use appendChild and removeChild instead of innerHTML

Related

How to add multiple contact numbers within a single textbox and also a X(clear) button for each of the text added using javascript?

How to add multiple contact numbers within a single textbox and also a X(clear) button for each of the text added using javascript?
Below is a part of my HTML page
Contact No:<input type="text" id="no"><input type="button" value="ADD" id="add" onclick="javascript:addContact();">
<input type="text" id="text_name" style="width: 300px;height:50px;" />
Here is my javascript function
function addContact(){
var temp = document.createElement("input");
temp.innerHTML="<input type='search' value='' alt='clear' >";
var contact_added=document.getElementById("text_name").value;
var contact=document.getElementById("no").value;
document.getElementById("text_name").value=contact+temp+contact_added;
}
This is what I get as my output
![My output]
However what I need is that for every text that I enter,it should be follow by a clear so that I can clear that selected block of text
function addContact(){
temp="<input type='search' value=''. alt='clear' >";
var contact_added=document.getElementById("text_name").value;
var contact=document.getElementById("no").value;
document.getElementById("text_name").value=contact+temp+contact_added;
}
However this doesnt solve your problem. I think it isnt a good idea, doing this with inputs and buttons. This only makes it complicated.
At first make a form with a hidden field:
<form action="submit.php" method="post">
<input name="contacts" id="contacts_hidden" style="display:none">
</form>
<div id="contacts">
</div>
//your submit button and input
Now you can do:
contacts=[];
function addContact(){
newcontact=document.getElementById("no");
contacts.push(newcontact.value);
newcontact.value="";
render();
}
function delete(i){
contacts.splice(i,1);
render();
}
//this takes the contacts array and adds it to the page + hidden submit field
function render(){
hidden=document.getElementById("contacts_hidden");
all=document.getElementById("contacts");
content="";
for(i=0;i<contacts.length;i++){
//add a delete button
content+=contacts[i]+"<a href='javascript:delete("+i+")'>Delete</a>";
}
all.innerHTML=content;
hidden.value=contacts.join(";");
}

Input Text Box Returns Undefined in Javascript

Here is my HTML:
<form name='cred' class="panel-body2">
<div class="form-group">
<label for='addjidlbl'> Username (JID):</label>
<input type='text' id='addjid' />
</div>
<input type='button' id='add' value='add' />
</form>
Here is the JavaScript:
$('#add').bind('click', function() {
var jid = $('#addjid').value;
alert(jid);
//var jid=document.getElementById('addjid').value;
var jid2 =$('#addjid').get(0).value;
alert(jid2);
// //$('#addjid').get(0).value;
log('jid=>'+jid);
var data = document.getElementById("addjid").value; //$(".panel.panel-default2#addjid").value;
alert(data);
alert("type=>"+ typeof(jid));
addRoster(jid);
});
function addRoster(jid) {
log('addRoster=>' + jid);
}
What I get are two message boxes with "undefined" and third with "type=>undefined". Why can't I get the input text of the addjid text box?
If I change var jid = $('#addjid').get(0).value;, jid is just blank even when the textbox has value. Why?
Change .value to .val() like
$('#addjid').value
should be
$('#addjid').val()
Here you have it working using .val()
add some text to the text box and
click on the add button and the alert will popup
$('#add').on('click', function() {
alert($('#addjid').val());
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form name='cred' class="panel-body2">
<div class="form-group">
<label for='addjidlbl'> Username (JID):</label>
<input type='text' id='addjid' />
</div>
<input type='button' id='add' value='add' />
</form>
If I understand correctly, you want:
$('#addjid').val()
Since you are using id's to get the value you will only have one element with the given id. When you do .get(0) or any index you are typically trying to get the value out of a given array of values. For Ex
<li>first</li> //0
<li>second</li> //1
Here in a structure like this you will do something like
$("li").get(0)
It will give you the first item with in li.
and to get the value you will need to use .val()
So you can use
$('#addjid').val()
Hope this helps you.
Happy Learning :)

accessing values from an input filed in html + jquery

here is my fiddle
I am looking at getting the values from an inpt form in html. for example I want to get the value that is entered in the Cat name: input form.
<div id="admin-form">
<form>
Cat name:<input id="admin-cat-name" type="text" name="cat-name" placeholder="10" value="10"><br>
Source: <input id="admin-source" type="text" name="source"><br>
Count: <input id="admin-count" type="text" name="count">
<button id="save-button" type="button">Save</button>
<button id="cancel-button" type="button">Cancel</button>
</form>
</div>
I am thinking along the lines of something like the below:
var form = $('form');
var form2 = $('form #admin-cat-name');
//alert(form)
console.log(form)
console.log(form2) // i think this is an array that has the value that I want?
but I just can't quite get the value from the input form. Can anyone advise how I do this? And if I am going about it the right way?
You are actually looking for .val(). Use the following code:
var form2 = $('form #admin-cat-name').val();
From the docs:
Get the current value of the first element in the set of matched elements or set the value of every matched element.
You can use this $("#admin-cat-name").val()

Submit multiple inputs through one form and append to array

So I am relatively new to JavaScript but I have experience with programming. I have this code which allows the user to define how many addresses they would like to enter so then I can query google maps and find the geographic center. The problem with this is that it looks very unprofessional in the sense that they have to enter the number of fields on one page and then they are prompted with that many boxes on the next page. Is there any way to make only one form(with all the parameters I require for one entry) and then after they click submit, I append it to an array and then when they decide they have enough addresses they hit the final submit so then I can process the data using a PHP call? Any help would be great, but I am new to this so I might need more spelt out explanations, sorry. Thanks again!
TL;DR: I want to create a single entry field which when submit is clicked, the page does not refresh or redirect to a new page and appends the data entry to an array. From there the user can enter a new input and this input would also be appended to the array until the user has decided no more inputs are necessary at which point they would click the final submit allowing me to process the data.
Here is the code I have so far:
<!DOCTYPE html>
<html class="no-js" lang="en">
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script>
$(function(){
var c = 0;
$("#button1").click(function(){
c = $("#inputs").val();
$("#mydiv").html("");
for(i=0;i<c;i++){
$("#mydiv").append('<input type="text" id="data'+i+'" name="data'+i+'" /><br/>');
}
});
$("#button2").click(function(){
$.post("getdata.php",$("#form1").serialize(),function(data){
});
});
});
</script>
</head>
<body>
<form id="form1">
Type the number of inputs:
<input type="text" id="inputs" name="inputs" />
<input type="button" id="button1" value="Create" />
<div id="mydiv"></div>
<input type="button" id ="button2" value="Send" />
</form>
</body>
</html>
getdata.php
<?php
for( $i=0; $i<$_POST["inputs"] ; $i++){
echo $_POST["data".$i]."\n";
}
?>
Here is code:
EDIT: I rewrite the code, so you can also delete each address
$(document).ready(function(){
$("#add-address").click(function(e){
e.preventDefault();
var numberOfAddresses = $("#form1").find("input[name^='data[address]']").length;
var label = '<label for="data[address][' + numberOfAddresses + ']">Address ' + (numberOfAddresses + 1) + '</label> ';
var input = '<input type="text" name="data[address][' + numberOfAddresses + ']" id="data[address][' + numberOfAddresses + ']" />';
var removeButton = '<button class="remove-address">Remove</button>';
var html = "<div class='address'>" + label + input + removeButton + "</div>";
$("#form1").find("#add-address").before(html);
});
});
$(document).on("click", ".remove-address",function(e){
e.preventDefault();
$(this).parents(".address").remove();
//update labels
$("#form1").find("label[for^='data[address]']").each(function(){
$(this).html("Address " + ($(this).parents('.address').index() + 1));
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="form1" method="post">
<div class="address">
<label for="data[address][0]">Address 1</label>
<input type="text" name="data[address][0]" id="data[address][0]" />
</div>
<button id="add-address">Add address</button>
<br />
<input type="submit" value="Submit" />
</form>
After form submit you can loop through addresses like this:
foreach ($_POST['data']['address'] as $address){
...your code
}
Hope this help! :)
Normally how I do this kind of stuff is to provide a user ability to add many input fields at client level and send them all in one array when submitting the form. That is more professional I believe. Try this JSFiddle to see what I mean.
<input type="text" name="address[]" />
if you want to POST dynamic value in a form you can do it like this:
<input type="text" name="adress[]" />
so in your case you could add new fields with javascript or jquery with the same name name="adress[]".
and in your PHP you get an array:
$adresses= $_POST['adress'];
foreach ($adresses as $adress) {
echo $adress;
}
FIDDLE DEMO
To process an array of inputs you can use the following convention:
HTML: simply add square brackets to the name attribute
<input type="text" id="data'+i+'" name="data[]" />
PHP: Post returns an array
for( $i=0; $i<$_POST["data"] ; $i++){
echo $_POST["data"][$i]."\n";
}
JAVASCRIPT: $("#form1").serialize() will retrieve all the inputs data as name=value pairs even the inputs that are added dynamically. There's no need to keep an array you can just process all of them at the end.
You don't need to create an array, $_POST is actually doing it all for you already.
So I suggest you do the following: using javascript (or jQuery), keep the button clicks, but make sure the form submission is prevented (using preventDefault on the form) [EDIT: You actually won't need this, as if the buttons are just buttons, no submit inputs, the form will not submit anyway], and just make sure you append another element every time they click a plus button or something; make sure you increment the name attributes of each input element that gets created.
When the user then creates submit, use submit the form via js, then on your getdata.php you can simply loop through all the values and use them that way you want. You will even be able to know the exact number by calculating the number of times a new input element has been added to the form.
I'll try to write up something for you in a minute, but if I was clear enough, you should be able to do that too.
EDITED: So here is what I've come up with; give it a try and see if this is something for you.
This is how the form would look like:
<form id="form1" name="myform" method="post" action="getdata.php">
Enter address 1: <input type="text" name="address-1" /> <input type="button" value="More" onclick="createNew()" />
<div id="mydiv"></div>
<input type="submit" value="Send" />
</form>
And this would be the js code:
var i = 2;
function createNew() {
$("#mydiv").append('Enter address ' + i +': <input type="text" name="address-' + i +'" /> <input type="button" value="More" onclick="createNew()" /><br />');
i++;
}
...and then getdata.php:
foreach ($_POST as $key => $value) {
echo 'The value for '.$key.' is: '.$value.'<br />';
}
here is a fiddle demo

Grabbing value and appending to textarea with Javascript?

I'm stuck!
I have this simple form:
<p><input type="text" name="hometown" id="hometown" size="22" /></p>
<p><textarea name="comment" id="comment"></textarea></p>
What I need is to append the input value from #hometown to textarea! It mustn't replace text already written there. In the best case, it'd just print at the end of whatever is written on ''submit'' click.
This is how far I've got with my Javascript, but nothing seems to work.
function addtxt(input) {
var hometown = document.getElementById('hometown').value;
var obj=document.getElementById(comment)
var txt=document.createTextNode(lol)
obj.appendChild(txt)
}
Textarea has value property to operate with its contents. Just use += to append text:
document.getElementById("comment").value +=
document.getElementById("hometown").value;
Try this
var oldval=$('#comment').val();
var newval=$('#hometown').val();
S('#comment').val(oldval+' '+newval);
Here's an example for you I've put on JSFiddle, using pure javascript and the onClick listener
http://jsfiddle.net/vyqWx/1/
HTML
<input type="text" name="hometown" id="hometown" size="22" />
<textarea name="comment" id="comment"></textarea>
<input type="submit" onClick="doMagic();">
JS
function doMagic(){
var homeTown = document.getElementById("hometown").value;
document.getElementById("comment").value += homeTown;
}

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