If I have 3 input boxes on a web page and the user clicks the second input, I need to get the input index, the position of the input on the page. I need it in pure javascript. This is what I have so far but it doesn't work...
document.querySelector('html').onclick = function (e) {
log(e);
}
function log(obj) {
var nodeName = obj.target.nodeName
var idx = nodeName.length
console.log(nodeName, idx);
}
Any help would be appreciated!
Pure javascript:
function getIndexFromSet(set, elm){
var setArr = [].slice.call(set);
for( var i in setArr )
if( setArr[i] == elm )
return i;
}
The above function can be used like so:
function checkInputFocus(e){
if(e.target && e.target.nodeName == 'input' )
index = getIndexFromSet(inputs, e.target);
}
var inputs = document.querySelectorAll('input');
document.addEventListener("click", checkInputFocus);
using jQuery, if you run this on this page (in your console)
var inputs = $('input'); // get all input elements on the page
inputs.index( $('#save-pinned-sites-btn') ); // find the index of spesific one
you will get a number representing the index of an $('#save-pinned-sites-btn') element
Inline:
<input onclick="for(i=0;i<this.parentNode.getElementsByTagName('input').length;i++){if(this==this.parentNode.getElementsByTagName('input')[i]){alert(i);}}">
Or change that to
onclick="show_index(this)"
And Add:
function show_index(which) {
for(i=0;i<which.parentNode.getElementsByTagName('input').length;i++){
if(which==which.parentNode.getElementsByTagName('input')[i]){
alert(i);
}}
Related
I want to replace #cardvieo_localstream with #cardvideo_remotestream at the first click, again I click the same element, I want to change #cardvideo_remotestream back #cardvieo_localstream, I'm not sharp at jQuery yet, but I'm trying to learn. I appreciate all help I can get.
I've try this code but working on first click. but not working on second click
$('.video-list .videoWrap').on('click', function() {
var $thisVideoWrap = $(this).find('.video-list .videoWrap');
var $mainVideoWrap = $('.mainVideoWrap');
if ($(this).attr('id') === '#cardvideo_localStream') {
$(this).attr('id', '#cardvideo_remotestream');
}
else if($(this).attr('id') == '#cardvideo_localStream') {
$(this).attr('id', '#cardvideo_local');
$mainVideoWrap.attr('id', 'cardvideo_remotestream');
}
});
Don't change An Id Attribute because of id is a unique value Only use the Classname, I swap the elements successfully
// using jQuery
var initVideoSwapping = function () {
// check if there is an element first
if ($('.video-list .videoWrap').length > 0) {
$('.video-list .videoWrap').on('click', function () {
var $thisVideo = $(this).find('video')[0];
var $mainVideo = $('.mainVideoWrap').find('video')[0];
swapNodes($thisVideo, $mainVideo)
});
}
}
function swapNodes(a, b) {
var aparent = a.parentNode;
var asibling = a.nextSibling === b ? a : a.nextSibling;
b.parentNode.insertBefore(a, b);
aparent.insertBefore(b, asibling);
}
$(function () {
initVideoSwapping();
});
I’m using angular.js to get some form data from some input fields. I need to build a feature that prevents a user from entering duplicate fields. So if a user entered duplicate fields I need alert the user with a alert box and than remove the duplicate. I know how to do this with jQuery, look at the code below. What is the most efficient way to achieve this with angular.js? Any help is greatly appreciated, I have template fiddle here to make it easier.
/** Handle Duplicate Barcodes **/
$(".alldifferent").on('keyup paste',function(){
var $this = $(this);
keyupDelay(function() {
var val = $this.val();
$this.attr('value', val);
if (val != '') {
var $dupes = $('input[value="' + val + '"]:gt(0)').val('');
if ($dupes.length > 0) alert('Error: Duplicates barcodes are not allowed!');
}
}, 300);
});
var keyupDelay = (function() {
var timer = 0;
return function(callback, ms) {
clearTimeout(timer);
timer = setTimeout(callback, ms);
};
})();
Try ng-blur as a blur event fires when an element has lost focus.
If you can know the index at which the duplicate entry is being entered you can filter that item in the array and clear it.
$scope.check = function(val, index){
if(val !== '') {
for(var i = 0; i < $scope.num.length; i++ ){
var itm = $scope.num[i].text;
if(itm == val && i != index) {
$scope.num[index].text = '';
alert('Error: Duplicates barcodes are not allowed!');
break;
}
}
}
}
Working Plunker
I have this problem trying to getting one single function attach multiple individual functions on "Change" event of a dropdown list using for ... in loop. The $('select') object top has no method 'on' is the Type error detected by Chrome Debugger.
Here is my code: (I don't have much JavaScript / jQuery knowledge so please be bear up with my coding)
function AKaizerDropdown(HiddenFeild) { //#id of hidden field passed as parameter
var select = $('select'); // select object assigned to variable
var selectcount = 0;
var Selecthold=new Array();
for (select in this) {
select.on('change', function() {
var SelectedIndex = this.attr('selectedIndex');
selecthold[selectcount] = [select.attr('id'), selectedindex];
//Select ID and Selected index assigned as an array into Selecthold Array element
});
selectcount +=1;
}
var item= new array();
//Elements in selecthold array printed onto hidden field
for (item in selecthold) {
$(HiddenFeild).val += item[0] + item[1]; //Assigns values to element Hiddenfield in DOM
}
}
Edited Code :
$.fn.AKaizerDropdown = function (HiddenFeild) {
var select_ = $(this).find('select');
var selectcount = 0;
var Selecthold=new Array();
select_.each(function () {
$(this).on('change', function () { //everything runs fine except dropdownlist doesn't enter into this event when an item is chosen
var SelectedIndex = this.selectedIndex;
Selecthold[selectcount] = [this.id, Selectedindex];
});
});
var button_ = $(this).find('input')
button_.on('click', function () {
for (item in Selecthold) {
$(HiddenFeild).val += item[0] + item[1]+','; //Assigns values to element Hiddenfeild in DOM seperated by ","
}
});
}
Somewhat fixed code still doesn't work
Here is the part where i attach it to popover Bootstrap(twitter 2.3.2) .
//think the problem lies here where the pop up seems to re-render the same same html found in ($#KaizerDragon") where all JavaScript is probably discarded?
$("#ContentPlaceHolder1_ADragonTreeviewt41").popover({
html: true, container: 'body',
trigger: 'click',
content: function () {
$(function () {
$("#KaizerDragon").AKaizerDropdown();
});
return $("#KaizerDragon").html();
}
});
So my question is how can I correct the above code to get the intended output(as in comments within code) ?
You are declaring
var select = $('select'); // select object assigned to variable
But then overriding the value in your for loop
for (select in this) ...
That is to say, the select inside the loop isn't the same as you declared above.
try something like this
select.each(function(){
$(this).on('change', function() {
var SelectedIndex = this.selectedIndex;
Selecthold[selectcount] = [this.id, SelectedIndex];
//Select ID and Selected index assigned as an array into Selecthold Array element
});
})
I have aI need to validate the input by .onblur such that whenever a text input loses focus it gets validated by the same JS function.
My problem is with the JS function. I want to grab the value of the item that loses focus.
function valid(){
if (isNaN("this should be the value of the text item??")){
}
Thankss..
To grab the value of an item as you blur, you should add the onBlur trigger to the DOM element as follows:
<input type="text" name="validate_me" onBlur="valid(this);" />
That way you have access to the DOM element that triggered the onBlur event and can access its properties (such as value or innerHTML in the case of textarea elements.
Your valid function can then be something like:
function valid(element) {
if (element.value != '' && isNaN(element.value))
alert('This field is not valid!');
};
This javascript should do what you are asking for:
(function(){
var after = function(existing,after) {
if ( existing == null || typeof existing !== 'function' ) {
return after;
}
else {
return function() { existing(arguments); after(arguments); }
}
}
var validate = function(input) {
alert('validating ' + input.name);
}
window.onload = after(window.onload, function() {
var inputs = document.getElementsByTagName('input');
for (var i = 0; i < inputs.length; i++) {
if ( inputs[i].type === 'text' ) {
inputs[i].onblur = after(inputs[i].onblur, function() {
validate(this);
});
}
}
});
}());
Clearly you will have to replace the alert in the validate function with your validation logic, but this should do what you ask.
A couple notes, the immediately invoked function is to ensure you don't clobber any globals, and the after function is to ensure that if you there is already an attached listener that your new validate listener will be called after the existing one.
how would this code be modified so it does not .focus() the first form object if it is readonly or disabled and to skip to the next form input for focus?
Currently it returns an error if the first input box is disabled, but i would also like to skip to the next input box if it's readonly too, and if all inputs are disabled and readonly, then it should not focus anything..
<script language="javascript" type="text/javascript">
// Focus first element
$.fn.focus_first = function() {
var elem = $('input:visible', this).get(0);
var select = $('select:visible', this).get(0);
if (select && elem) {
if (select.offsetTop < elem.offsetTop) {
elem = select;
}
}
var textarea = $('textarea:visible', this).get(0);
if (textarea && elem) {
if (textarea.offsetTop < elem.offsetTop) {
elem = textarea;
}
}
if (elem) {
elem.focus();
}
return this;
}
</script>
Actually using input:enabled:visible fixes alot of my issues, but i'm still trying to figure out if readonly, to skip to the next one.
use :
$(yourElement).not(":disabled").not(":readonly")
Well here is the answer anyways for those looking..
var elem = $('input:enabled:visible:not([readonly="readonly"])', this).get(0);
You need to change the condition to
if (elem && !elem.prop('readonly') && !elem.prop('disable')) {