I have a form which is split up into sections using pagination on each tag. (See Fiddle)
I however have required fields in each section, I'd like to validate it so that fields with the "required" attribute must not be blank before the user moves on to the next section.
http://jsfiddle.net/Azxjt/
I've tried to following but don't think I'm on the right tracks:
$(this).closest("article > :input").each(function() {
if($(this).val == null) {
con = 0;
}
});
if ( con == 0 ) {
alert("All fields must be filled in");
}
else {
}
Your help is appreciated :)
Text input will return a black value if no response has been entered. Try the following
In jQuery, the value is returned by val()
$(this).val() == ""
You could possibly enhance your jQuery selector to test only those input elements with a corresponding required label.
Use each function.
var isEmpty;
$("input").each(function() {
var element = $(this);
if (element.val() == "") {
isEmpty= true;
}
});
Related
I am trying to achieve AutoFocus functionality on the first empty form field which can be an input element or any kind i.e.
1. textbox
2. radio button
3. Select
4. checkbox
I have had a look at the jquery website and tried using the :input selector
but I am unable to achieve Autofocus on any input field other than text box.
I have also setup a JS Fiddle,
Fiddle for code
Can somebody help here?
You might need to use filter() to find the inputs with empty values:
$(function () {
$("input:enabled").filter(function () {
return this.value.trim() == "";
}).first().focus();
});
This will not work if you are using checkbox. So for that:
$(function () {
$("input:enabled").filter(function () {
if ($(this).attr("type") == "checkbox" || $(this).attr("type") == "radio")
return $(this).val().trim() == "" || !this.checked;
else
return this.value.trim() == "";
}).first().focus();
});
Fiddle: http://jsfiddle.net/7fwrd2rk/
You need to filter() out the empty/unchecked inputs and set focus to the first element in the matched set, as below.
$(function () {
$("input:enabled").filter(function () {
return this.type.match(/checkbox|radio/i) && //when it's a checkbox/radio
!this.checked || //get me a list of unselected ones
($.trim(this.value) === ""); // else get me a list of empty inputs
}).first().focus(); //grab the first from the list and set focus
});
Here is a demo along the same lines.
This includes textarea and select.
I have a site using input:text, select and select multiple elements that generate a text output on button click.
Having searched SO, I found examples of validation code that will alert the user when a select field returns an empty value-
// alert if a select box selection is not made
var selectEls = document.querySelectorAll('select'),
numSelects = selectEls.length;
for(var x=0;x<numSelects;x++) {
if (selectEls[x].value === '') {
alert('One or more required fields does not have a choice selected... please check your form');
return false;
$(this).addClass("highlight");
}
At the end, I tried to add a condition after the alert is dismissed, such that the offending select box will be highlighted by adding the 'highlight' class - but this doesn't do anything. My .highlight css is {border: 1px red solid;}
Any help here?
UPDATED WITH ANSWER - Thanks #Adam Rackis
This code works perfectly. I added a line to remove any added '.highlight' class for selects that did not cause an error after fixing
// alert if a select box selection is not made
var selectEls = document.querySelectorAll('select'),
numSelects = selectEls.length;
$('select').removeClass("highlight");//added this to clear formatting when fixed after alert
var anyInvalid = false;
for(var x=0;x<numSelects;x++) {
if (selectEls[x].value === '') {
$(selectEls[x]).addClass("highlight");
anyInvalid = true;
}}
if (anyInvalid) {
alert('One or more required fields does not have a choice selected... please check your form');
return false;
}
You were close. In your loop, this does not refer to each select that you're checking.
Also, you're returning false prior to the highlight class being added. You'll probably want to keep track of whether any select's are invalid, and return false at the very end after you're done with all validation.
Finally, consider moving your alert to the very bottom, so your user won't see multiple alerts.
var anyInvalid = false;
for(var x=0;x<numSelects;x++) {
if (selectEls[x].value === '') {
$(selectEls[x]).addClass("highlight");
anyInvalid = true;
}
}
if (anyInvalid) {
alert('One or more required fields does not have a choice selected... please check your form');
return false;
}
Also, since you're already using jQuery, why not take advantage of its features a bit more:
$('select').each(function(i, sel){
if (sel.value === '') {
$(el).addClass("highlight");
anyInvalid = true;
}
});
if (anyInvalid) {
alert('One or more required fields does not have a choice selected... please check your form');
return false;
}
Hi all im new to jscipt,,, well, programming in general to be honest, but learning slowly for personal use.
I seek guidence on how i could place all the textboxes(inputs) in my index file into a list container, loop through them to check if they are empty or not before clicking the calculate button. If they are empty then inform the user of which one is empty.
Also, is there a way of preventing users from entering text into the textboxes and numbers only.
Background: im creating a form that requires all fields to be populate with numbers(in hours), a graph will then be generated from those values.
ive placed the file in skydrive for folks to download with the link below.
Index file
I did try the following but this alerts me regardless of weather the texboxes are populate or not.
function checkInputsGenerateGraph()
{
if( $('#hutz-hoursInput').val() == ""||$('#hutz-weeksPerYearInput').val() == ""||$('#hutz-jobsPerWeekInput').val() == ""||$('#hutz-hourlyMachineRateInput').val() == ""||$('#hutz-maintneneceDowntimeInput').val() == ""||$('#hutz-scrapRateInput').val() == ""||$('#hutz-toolsPerJobInput').val() == ""||$('#hutz-timeToLoadToolInput').val() == ""||$('#hutz-timeToSetPartsInput').val() == "")
{
alert('One them is empty!!');
}
else
{
$("#hutz-graph").slideDown();
$("#hutz-lblImproveMyProcess").slideUp();
$("#hutz-hoursInput").slideUp();
$("#hutz-weeksPerYearInput").slideUp();
$("#hutz-jobsPerWeekInput").slideUp();
$("#hutz-ourlyMachineRateInput").slideUp();
$("#hutz-ntneneceDowntimeInput").slideUp();
$("#hutz-scrapRateInput").slideUp();
$("#hutz-toolsPerJobInput").slideUp();
$("#hutz-timeToLoadToolInput").slideUp();
$("#hutz-timeToSetPartsInput").slideUp();
$("#hutz-lblMachineDetails").slideUp();
$("#hutz-lblPartSetting").slideUp();
$("#hutzcurrencyPreferenceInput").slideUp();
createChart();
}
}
First off, give all the required elements a common class, for examples sake we'll call this required:
<input type="text" class="required" id="hutz-hoursInput" />
Then, when your checkInputsGenerateGraph() function is called, you can loop over the required elements and check them:
$('.required').each(function() {
if (this.value.length == 0) {
alert(this.id + ' is empty!');
}
});
You could also do something like the following to remove all non-digits from your inputs:
$('.required').change(function() {
this.value = this.value.replace(/[^\d]+/, '');
});
See it in action
Hope that points you in the right direction!
edit
Here's a complete example:-
function checkInputsGenerateGraph() {
var isValid = true;
$('.example').each(function() {
if (this.value.length == 0) {
alert(this.id + ' is empty!');
isValid = false;
}
});
if (isValid) {
alert('do calculations!');
}
}
So, loop over all of the elements first, and make sure they are all populated. If not, set isValid to false so that once the loop completes, the calculations are not performed.
Anyone know of a good tutorial/method of using Javascript to, onSubmit, change the background color of all empty fields with class="required" ?
Something like this should do the trick, but it's difficult to know exactly what you're looking for without you posting more details:
document.getElementById("myForm").onsubmit = function() {
var fields = this.getElementsByClassName("required"),
sendForm = true;
for(var i = 0; i < fields.length; i++) {
if(!fields[i].value) {
fields[i].style.backgroundColor = "#ff0000";
sendForm = false;
}
else {
//Else block added due to comments about returning colour to normal
fields[i].style.backgroundColor = "#fff";
}
}
if(!sendForm) {
return false;
}
}
This attaches a listener to the onsubmit event of the form with id "myForm". It then gets all elements within that form with a class of "required" (note that getElementsByClassName is not supported in older versions of IE, so you may want to look into alternatives there), loops through that collection, checks the value of each, and changes the background colour if it finds any empty ones. If there are any empty ones, it prevents the form from being submitted.
Here's a working example.
Perhaps something like this:
$(document).ready(function () {
$('form').submit(function () {
$('input, textarea, select', this).foreach(function () {
if ($(this).val() == '') {
$(this).addClass('required');
}
});
});
});
I quickly became a fan of jQuery. The documentation is amazing.
http://docs.jquery.com/Downloading_jQuery
if You decide to give the library a try, then here is your code:
//on DOM ready event
$(document).ready(
// register a 'submit' event for your form
$("#formId").submit(function(event){
// clear the required fields if this is the second time the user is submitting the form
$('.required', this).removeClass("required");
// snag every field of type 'input'.
// filter them, keeping inputs with a '' value
// add the class 'required' to the blank inputs.
$('input', this).filter( function( index ){
var keepMe = false;
if(this.val() == ''){
keepMe = true;
}
return keepMe;
}).addClass("required");
if($(".required", this).length > 0){
event.preventDefault();
}
});
);
I have a form which contains couple fields. Its very easy to validate this form. But when I'm using append or clone comand and add couple more fields in it dynamically I cannot validate the appended fields.
Here is the my code:
function addone(container, new_div) {
var to_copy = document.getElementById(new_div);
$(to_copy).clone(true).insertAfter(to_copy);
}
And because it doesn't matter which fields and I want all of them get field out I used class instead of id.
$(document).ready(function(){
$('#add_size').live('click', function(){
if($('.inp').val() == "") {
alert('Need to fill-out all fields')
}
else {
alert('Thanks')
}
})
})
Any idea? Thanks in advance.
$(document).ready(function(){
$('#add_size').live('click', function(){
if( ! checkvalid() ) {
alert('Need to fill-out all fields')
}
else {
alert('Thanks')
}
})
})
function checkvalid(){
var valid = true;
$('.inp').each(function(){
if (this.value == '') {
valid = false;
return;
}
})
return valid;
}
I see one thing that might cause you trouble...:
If you're only going to check fields for validity on submit, then I don't think you need the live handler. You're not adding fields with #add_size, you're adding .inp's. Just do your validations on click, and jQuery should find all the .inp class fields that are there at the time of the event:
$('#add_size').click(function(
$('.inp').each ...
)};
Or maybe I totally read the question wrong...