Develop Reference

How to increment the name attribute array using javascript function

I want to increment the value of the name attribute whenever the function is called. Below I have added all the code through which I add new text boxes using jQuery clone function. Hope now everything is clear.
function addQuestion(){
var question = jQuery('#question-template').clone();
question.css("display","block").removeAttr('id');
jQuery('#questions').append(question);
}
function renameQuestions(){
jQuery('.question-box').each(function(i,v){
jQuery(this).find('.question_id').html(i);
});
}
jQuery('#add-question').on('click', function(e) {
e.preventDefault();
addQuestion();
renameQuestions();
});
jQuery(document).on('click','.del-question', function(e)
{
e.preventDefault();
jQuery(this).closest('.question-box').remove();
renameQuestions();
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" name="quiz[0][english][ques_title]" class="ques_title" placeholder="Enter question title" value="">
<textarea name="quiz[0][english][ques_desc]" class="ques_desc" rows="4" placeholder="Explaination here...."></textarea>
<a id="add-question" class="button" href="#">Add</a>
<a class="del-question button" href="#" data-id="1">Remove</a>
I want to increment the value quiz[0], whenever the add-question button is clicked, I tried using PHP adding a PHP variable in the JS function. But then I got to know it will not work because one is server side and other is client side scripting.

Demo: http://jsfiddle.net/GCu2D/5163/
JS:
function renameQuestion() {
var question = $(".question-box:last");
var total_question = parseInt((".question-box input:first").attr("name").replace( /^\D+/g, ''))+1;
question.find("input").each(function() {
var elem = $(this);
elem.attr("name", elem.attr("name").replace(/[0-9]/g, total_question));
});
}
This should solve your issue.

alerting the value of an input type number

Here is the code that I am having problems with. Below it I'll add an explanation:
$(function() {
var $input = $("#input");
var input = $input.val();
var $go = $("#go");
$go.click(function() {
alert(input);
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<main>
<input type="number" id="input">
<button type="button" id="go">GO!</button>
</main>
The code above is a dummie example to represent my actual question, no more background is needed.
So I have one input type="number" id="input" in which you input a number, and a button type="button" id="go".
In my jQuery, I first declare $input which holds the element #input, then input which holds the value of the element #input, and finally $go which holds the element #go.
Below that I have a function, that says that when I click on #go, I should be able to alert(input).
Now, this code does not do that. In my head this makes perfect sense, but apparently it doesn't work.

That is because you are declaring input outside the click function, which means the value (simply an empty string) is set at runtime and will not be updated. You should define input within your click event handler:
$(function() {
var $input = $("#input");
var $go = $("#go");
$go.click(function() {
var input = $input.val();
alert(input);
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<main>
<input type="number" id="input">
<button type="button" id="go">GO!</button>
</main>

First of all, StackOverflow seems to block alerts origination from the code snippet, it will be much easier to output them to the console instead so you can keep track of things.
Your code can be simplified way down without the need for many variables.
But your main problem was the fact that the input value was not getting reset when the click event happened but was getting picked up on page load, meaning it would be stuck at ''.
$(function() {
$("#go").click(function() {
var input = $("#input").val();
console.log(input);
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<main>
<input type="number" id="input">
<button type="button" id="go">GO!</button>
</main>

Linking form and button to javascript command

I am trying to make a simple form and button work. I have linked to a JS Fiddle here View JS Fiddle here
<form>
<input type="text" class="form-control" id="search" placeholder="enter sport">
<button type="submit" id="WFFsearch">Search</button>
</form>
$('#WFFsearch').on('click', function () {
var searchInput = $('#search').text();
var url = "http://espn.go.com/" + searchInput + "/statistics";
window.open(url);
});
I want to be able to enter "nba" without the quotation marks and click the search button, then have a new window which generates the following link http://espn.go.com/nba/statistics. The first part and the last part of all the urls will be the same, it's just the middle that changes (nba, nfl, mlb). Any help would be greatly appreciated, thanks!

$('#WFFsearch').on('click', function () {
var searchInput = $('#search').val();
var url = "http://espn.go.com/" + searchInput + "/statistics";
window.open(url);
});
You need val() property, since input is in question, not text(). https://jsfiddle.net/1c93pqj0/2/

you wanna use the .val() instead of .text() as text gets the value between 2 tags <div>here is some text</div> and val gets the value <input value="some value"/>

EzPz! This is a very simple task. First of all though, since you're using jQ to establish your button's click event, you can either drop the attribute type="submit", OR (recommended), create your event on the form's submit. If it were me, I'd id the form and use the forms submit, so that you don't need any alters to your button type="submit" and enter key can still be used in search box to submit the form.
Also, you're trying to .text on an input. Input's have value. In jQuery you can get or set that value by calling .val() instead.
The code:
$('#frmGetStats').on('submit', function (e) {
e.preventDefault();
var searchInput = $('#search').val(),
url = "http://espn.go.com/" + searchInput + "/statistics",
win = window.open(url);
alert("In this sandbox, new windows don't work. \nHowever you can see the link is \n[" + url + "]");
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<form id="frmGetStats">
<input type="text" class="form-control" id="search" placeholder="enter sport">
<button id="WFFsearch" type="submit">Search</button>
</form>

To get the value of an input field, use .val(). .text() is for the text in a DOM element.
Clicking on the submit button submits the form by default, which reloads the page and kills the script. You need to return false from the event handler to prevent this.
$('#WFFsearch').on('click', function () {
var searchInput = $('#search').val();
var url = "http://espn.go.com/" + searchInput + "/statistics";
window.open(url);
return false;
});
DEMO

Set the default value of an input text

my requirement is to save the entire "html" inside a div, but when i load an "html" with text fields to a div and then editing the value of the text box, the newly set value doesn't reflect in the core "html". I tried to inspect the value with fire bug and it remains the same or no value at all.With "jquery" i tried to set attribute but no attribute name value is created. how can i set the value of text fields and then get that "html" with the newly set value.
here is my html
<div class="sub_input_box">
<input type="text" / class="boreder_line">
<input type="text" id="txt" value=""/>
<input type="hidden" id="hid" />
<div class="clear"></div>
</div>
and the jquery i used to set attribute
$("#txt").attr("value", "some value");

Chances are you're calling your jQuery code before the HTML input part. You can either place the jQuery stuff below it, or if you don't want to, you can do something like this:
$(document).ready(function(){
$("#txt").attr("value", "some value");
});
That will only run when the page is fully loaded.
However, it's unclear if you're using AJAX to load those inputs into your DOM. If so, you need to call $("#txt").attr("value", "some value"); in the onSuccess callback function which is fired after the AJAX successfully responds.

You can try something like this:-
<input name="example" type="text" id="example"
size="50" value="MyDefaultText" onfocus="if(this.value=='MyDefaultText')this.value=''"
onblur="if(this.value=='')this.value='MyDefaultText'" />

Have you tried:
$("#txt").val("Hello World!");
For setting the text value, and,
var my_string = $("#txt").val();
For getting the text value.
Let me know if it works.

Excellent question. You would think clone would do this on its own, alas, it doesn't.
Here is a sample than you can hopefully adapt to do what you need
HTML
<div id=divToCopy>
<input name=i1 value=foo><br>
<input name=i2 value=bar>
</div>
<input type=button onclick=copyDiv(); value='Copy the div'>
<div id=newDiv>
the copy will go here
</div>
JavaScript
function copyDiv() {
$('#newDiv').html($('#divToCopy').clone());
$('#divToCopy :input').each(function() {
var child=0;
for (var i = 0; i < this.attributes.length; i++) {
var attrib = this.attributes[i];
var prop=$(this).prop(attrib.name);
$($('#newDiv').find(' :input')[child]).prop(attrib.name,prop);
child++;
}
});
}

But it does work: http://jsbin.com/eXEROtU/1/edit
var html = '<input type="text" id="txt" value=""/>';
$(document).ready(function() {
$("#load").click(function() {
$("#sub_input_box").html(html);
});
$("#inspect").click(function() {
alert($("#txt").val());
});
});

$(document).on('focusout','input[type="text"]',function(a){
console.log(a.target.value);
a.target.setAttribute("value",a.target.value);
});
this is the solution i found, i had to set the value attribute explicitly on loose focus from the text field

javascript getting the value of a text box

I have this text box here...
<input name="search" type="text" maxlength="512" id="search" class="searchField" autocomplete="off" title="" />
and I also have this submit
<input type="submit" name="btnSearch" value="Search" onclick="location.href='http://www.website.com/search/';" id="btnSearch" class="buttonSearch" />
what I am trying to do is add whatever is in the text box in my
onclick="location.href='http://www.website.com/search/';"
so it would look like this..
onclick="location.href='http://www.website.com/search/what ever the user searches';"
how would I go about doing this, I have been googling my little heart out.

Please avoid mixing JavaScript and HTML. You can remove onclick attribute and replace it with this in plain JavaScript somewhere after the DOM has loaded:
document.getElementById('btnSearch').onclick = function() {
var search = document.getElementById('search').value;
var searchEncoded = encodeURIComponent(search);
window.location.url = "http://www.website.com/search/" + searchEncoded;
}
Also remember about escaping the search box, e.g. using encodeURIComponent(). Here is a working jsfiddle example.

This should work:
onclick="location.href='http://www.website.com/search/'+document.getElementById('search').value;"
But I wouldn't ever write that in one of my project as writing script directly on tags is a bad practice.

Here is a working jsfiddle
I moved the event handler out of the button as it is more maintainable. Also I encode the search query so that it gets to the server properly.
var search = document.getElementById('search');
var submit = document.getElementById('btnSearch');
submit.addEventListener('click', function(e) {
var searchValue = encodeURIComponent(search.value); // encode the search query
window.location.href = 'http://www.website.com/search/' + searchValue ;
});

You can add it to the onclick event like so
document.getEelementById("btnSearch").onclick = function(){
location.href='http://www.website.com/search/' + document.getEelementById("search").value;
}
edit: aaaaand too slow... oh well. At least this is not inline.

You would be better off using the < script> tag for this task. Example:
<input name="search" type="text" maxlength="512" id="search" class="searchField" autocomplete="off" title="" />
...
<input type="submit" name="btnSearch" value="Search" id="btnSearch" class="buttonSearch" />
<script type="text/javascript">
var button= document.getElementById('btnSearch');
button.onclick= function(){
var text= document.getElementById('search').value;
location.href='http://www.website.com/search/'+text;
}
</script>
However, you should try to 'clean' a little the text from the textbox so when you append it to the url you get a valid url. You should trim the text, then search for special characters and escape them, etc.