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How to change value of multiple text inputs using class name

I want to be able to change multiple text inputs (but not all) by class, but can't seem to get it working.
Any ideas?
Basically I have multiple reset buttons on the same page I'd like to have 'resetting' the value of the targeted text inputs to nothing.
Here's the code:
$(".reset").on('click', function() {
document.getElementsByClassName('input-1').value = '';
});
It works fine when using getElementById, but I would rather minimise the code and not have to repeat it each time for every text input.

You are already using jQuery, so just use
$(".reset").on('click', function() {
$('.input-1').val('');
});
Notice the . before the class name, same as in .reset.
If you want to use vanilla JavaScript, you have to loop through the HTMLCollection returned by getElementsByClassName:
$(".reset").on('click', function() {
Array.from(document.getElementsByClassName('input-1')).forEach(el => el.value = '');
});
jQuery does that automatically for you.

You can use an special selector for this job:
let inputs = [... document.querySelectorAll("[class^='input-']")];
inputs.forEach(i => i.value = "");
class^= will return all the elements containing class attribute starting with "input".

How to live check element inset html with jQuery.

I have some block with dinamicly parsing content. I need to change some style for it but if there is some html. My question: is there any possible to live check with jQuery that some element have html at specify moment and set some actions if it's for example empty? Thx for some information.
My code:
if ($('.degrees').live().html === ("")){
$('.block').fadeOut('slow');
}

Try this:
to detect divs that were empty and got their html changed:
$('.degrees:empty').on('DOMSubtreeModified',function(){
//...
});
to detect every html change
$('.degrees').on('DOMSubtreeModified',function(){
if($(this).is(':empty')) // check if it became empty ..
});

You can check it this way:
if($('.degrees').html().length > 0){
// element has children
} else {
// no children
}

You can check if the element is empty like so:
if ($('.degrees').is(':empty')){
$('.block').fadeOut('slow');
}
but it will only work when you do the check, and not for future elements, to do that you would have to use an interval to check it regularly, and that's generally not a good idea.

You can check the children element:
var $main = $('.degrees'),
$child = $('.block');
if($main.children().length < 0) {
$child.fadeOut(500);
}

How do you 'replace' numbers with 'x's' in jQuery with one button?

Does anyone know how to do replace multiple text by clicking a button with jQuery?
I've built a website that displays some text/data eg; "£100.00", but I what I need is to be able to 'replace' those monetary values with "£XXX.XX" with a 'Hide' button like you get on some banking websites. For example one web page has:
£100.00, £200.00, £130.00 etc etc..
...so when a user presses the Hide button, all of the numbers on the page turn to £XXX.XX. Ideally, the button should then display "Show" instead of "Hide" and switch back when toggled.
This is for a static dummy site, so no data base.
I suspect this is best handled with jQuery?
Thanks for your time,
D.

Case 1: Controlled Input
Assuming you can at least wrap all monetary values with something like this:
<span class="money-value">£200.00</span>
<span class="money-value">£300.50</span>
And that you can add button declared with:
<button id="secret-button">hide</button>
Then you could have some jQuery code doing this:
/**
* Simple search and replace version.
*/
$(function() {
$("#secret-button").click(function() {
$(".money-value").html($(".money-value").html().replace(/[0-9]/g,"X"));
});
});​
or a more advanced one with:
/**
* Complet version.
*
* 1) on button click, if asking to hide:
* 1.1) iterate over all entries, save their text, and replace it with markers
* 1.2) toggle the button's text to "show"
* 2) on button click, if asking to show:
* 2.1) iterate over all entries, restore previous text
* 2.2) clear the hidden store
* 2.3) toggle the button's text to "hide"
*/
$(function() {
var hiddenStore = [];
$("#secret-button").click(function() {
if ($(this).html() == "hide") {
$(".money-value").each(function () {
var text = $(this).html();
hiddenStore.push(text);
$(this).html(text.replace(/[0-9]/g,"X"));
});
$(this).html("show");
} else {
$(".money-value").each(function (i) {
var text = hiddenStore[i];
$(this).html(text);
});
hiddenStore = [];
$(this).html("hide");
}
});
});​
Complete solution is here: See here: http://jsfiddle.net/u79FV/
Notes:
this won't work for input field values
this assumes your text entries have been marked as shown above
Does what you want with the button's changing state.
Saves the values and puts them back.
Meant to work even if new fields are added dynamically.
Shankar Sangoli's answer uses a different way of saving the stored data, which you could as well consider (using the jQuery .data() method).
you may want to switch the button to an <input type="button" /> tag, in which case you'd use .val() instead of .html() to toggle its text.
Case 2: Uncontrolled Input
Assuming you don't have control over where the values may show up, then you need to do something a bit more complicated, which is to look in the whole page for something that would look like a currency format. I'd advise against it.
But, the jQuery Highlight plugin could be something to look at, as its code does something similar (in that it searches for pieces of code to modify), and you could then reuse some of solution 1 to make it fit your purpose.
That would be harder to design in a fool-proof fashion though.

You could use a regular expression:
var expression = /\d{1}/g;
var newString = myString.replace(expression,"X");
Then just dump newString into whatever control you need it to appear in.
Edit:
A jQuery idea for something like this would be to give all of the controls that have these numbers a common class identifier to make them easy to grab with the selector:
$(".numbers").each(function() {
$(this).text($(this).text().replace(/\d{1}/g, "X"));
}
... more readable ...
$(".numbers").each(function() {
var text = $(this).text();
var newText = text.replace(/\d{1}/g, "X");
$(this).text(newText);
}

If your markup is something like this you can try this.
<span>£1000.00</span><span class="showhide">Hide</span>
JS
$('.showhide').click(function(){
var $this = $(this);
var $prev = $this.prev();
if(!$prev.data('originalvalue')){
$prev.data('originalvalue', $prev.text());
}
if($this.text() == 'Hide'){
$this.prev().text($prev.data('originalvalue').replace(/\d{1}/g,"X"));
$this.text('Show');
}
else{
$prev.text($prev.data('originalvalue'));
$this.text('Hide');
}
});
In the above code I am basically storing the original value using jQuery data method within the span element itself which is used to display the actual value.
Once you click on Hide, get the previous span using prev() method and set its text with original value replacing all the numbers in it by X. Then change the link text from Hide to Show.
Next when you click on Show get the previous span using prev() method and set its text with the original value and change the link text from Show to Hide.
References: .prev(), .data()

$('#yourButton').click(function(){
var saveText = $('body').text();
$(this).data('oldText', saveText);
if ($(this).text() == "Hide"){
$('body').text($('body').text().replace(/\d{1}/, "X"));
$(this).text('Show');
}
else{
$('body').text($(this).data('oldText'));
$(this).text('Hide');
}
});
This is kind of a complicated problem actually. You will need to be able to save the state of the text when its in number form so you will be able to toggle back and forth. The above code is untested but hopefully it will give you an idea what you need to do.

function toggleMoney() {
$('.money').each(function() {
var $$ = $(this), t = $$.text();
$$.text($$.data('t') || t.replace(/\d/g, 'X')).data('t', t);
});
$('#toggleButton').text($('.money').text().match(/\d/) ? 'hide' : 'show');
}
http://jsfiddle.net/DF88B/2/

Extracting text from a HTML to be stored as a JS variable, then to be added to a separate HTML's element

Alrite, I have seen other Questions with similar titles but they don't do exactly what Im asking.
I have 2 x HTML documents, one containing my page, one containing a element with a paragraph of text in it. As-well as a separate .js file
what I want to do is extract this text, store it as a JS variable and then use jQuery to edit the contents of an element within the main page. This is the conclusion I came to but it didnt work as expected, im not sure if it is me making a syntax error or if i am using the wrong code completely:
$(document).ready(function(){
var c1=(#homec.substring(0))
// #homec is the container of the text i need
$(".nav_btn #1").click(function(c1){
$(".pcontent span p") .html(+c1)}
);
});
i know +c1 is most probably wrong, but i have been struggling to find the syntax on this one. thankyou in advance :D

var c1=(#homec.substring(0)) will throw an error because #homec is not a valid variable name, is undefined, and does not have a property function called substring. To get the html of an element with an id of homec, use the html method:
var c1 = $("#homec").html();
c1 should not be an argument of the click function because it is defined in the parent scope. +c1 is unnecessary because you do not need to coerce c1 to a number.
If you are trying to add content to the end of the paragraph, use the append method:
$(".pcontent span p").append(c1)
That means you should use this code instead:
$(document).ready(function() {
var c1 = $("#homec").html();
$(".nav_btn #1").click(function() {
$(".pcontent span p").append(c1)
});
});
P.S. Numbers are not valid ID attributes in HTML. Browsers support it, so it won't make anything go awry, but your pages won't validate.

Try this:
$(".nav_btn #1").click(function(c1){
var para = $(".pcontent span p");
para.html(para.html() + c1);
});

The JQuery text() function will allow you to get the combined text contents of each element in the set of matched elements, including their descendants. You can then use the text(value) function to set the text content of your target paragraph element. Something like this should suffice:
$(document).ready(function() {
var c1 = $("homec").text();
$(".nav_btn #1").click(function() {
$(".pcontent span p").text(c1);
});
});
See the JQuery documentation for more details on the text() function. If you need to capture the full structure of the other document, then try the html() function instead.

How to get form fields from a specific fieldset?

I'm writing a HTML form that's divided in fieldsets, and I need to get the form fields from a specific fiedset in a function.
Currently it's like this:
function conta(Fieldset){
var Inputs = Fieldset.getElementsByTagName("input");
var Selects = Fieldset.getElementsByTagName("select");
/* Doing the stuff I need to do in two iterations, one for each field type */
}
But who knows what the future may hold, and if the form gets some new field types (radios, checkboxes) this could become awful to mantain.
I know that form elements have the elements attribute that returns all the form fields and I was hoping I could use something like that.
(I know I still gotta discriminate the field type in a bunch of conditionals inside the iteration, but I think it would be faster and easier to keep. Unless it isn't and I should not be doing it)

#Ryan is on the right track if you want to use jQuery (and I would), but I'd suggest something more along the lines of:
$('fieldset#fieldset1 > input[type=text]').each( function() {
... do something for text inputs }
);
$('fieldset#fieldset1 > input[type=radio]').each( function() {
... do something for radios }
);
$('fieldset#fieldset1 > select').each( function() {
... do something for selects }
);
$('fieldset#fieldset1 > textarea').each( function() {
... do something for textareas }
);
As an improvement over if-then-else constructs.

Radio buttons and checkboxes are still input tags and will be in the Inputs var. The problem is, you'll need to add handlers for the checked state to see which radio buttons and checkboxes are selected.
Even worse, you can have more than one radio button and checkbox with the same name... in fact you have to for radio buttons or they don't work as expected.

No jQuery, no problem:
function condat(fieldset) {
var tagNames = ['input', 'select', 'textarea']; // Insert other tag names here
var elements = [];
for (var i in tagNames)
elements.concat(fieldset.getElementsByTagName(tagNames[i]);
for (var i in elements) {
// Do what you want
}
}

Filip Dupanović solution together with the second Cargowire comment worked for me, but only with a minor modification. Cargowire's second comment only produced an array which just holds the sliced characters of the tagNames array (I would have written this in a comment, but I lack the rep so far).
Here is what worked:
function condat(fieldset) {
var tagNames = ['input', 'select', 'textarea']; // Insert other tag names here
var elements = [];
for (var i in tagNames) {
elements = elements.concat([].slice.call(fieldset.getElementsByTagName(tagNames[i])));
}
for (var i in elements) {
// Do what you want.
// Attributes of the selected tag's can be referenced for example as
// elements[i].value = ...;
}
}
A usefull application of this would be to define buttons which only reset a fieldset instead of the whole form. Just use elements[i].value = elements[i].defaultValue; in the //do what you want part, for text inputs to be reseted. And of course bind the condat function onto the onclick event of the button providing the fieldset dom element as a paramenter.

Haven't tested this and don't know how it would work, but you could use JQuery here to select all the elements into a JQuery object
//$("input select textarea").each(function() {
$(":input").each(function() { //even better
// do stuff here
});
this would at least cleanup the code, although you would still have to add conditional statements based on field type like you mentioned.

You should use just querySelectorAll:
function condat(fieldset) {
var elements = fieldset.querySelectorAll('input, select, textarea');
elements.forEach(function(element){
// Do what you want with every element
});
}