Double tap on ipad devices when text area value changes - javascript

In my pop up dialog box I'm using jquery live() to change the value of the textarea when it loses the focus (blur event). When I close the dialog by clicking the cancel button it works fine in desktop browsers, but in my ipad devices, when i tired to close the dialog by clicking the cancel button the following behaviour occurs
1) on my first tap, the blur event is called and the textarea value changes (virtual keypad also hides).
2) on second tap, the pop up window closes.
Note : when I makes the value attribute of the textarea on blur event to null. it works fine in ipad devices.
I want the pop up to be closed on single tap itself.

Some suggestions.
Are you binding the "click" event ?
Try to change from live() to on(): https://api.jquery.com/on/
Try stopping propagation and default event:
$("some_element").on('click', function(ev) { ev.stopPropagation(); ev.preventDefault(); /* Your code here */ return false;});
Are you trying to create a placeholder text for the input ? If so you can use the "placeholder" attribute in HTML5 to implement this without any scripts.

Related

iOS HTML autocorrect - save previous value after programmaticaly textarea clean

I have a trouble with iOS HTML5 autocorrect. It's reproduced by JSBin http://jsbin.com/zusahev
// click - textarea loses focus - keyboard is closed
b1.addEventListener("click", function() {
t1.value = '';
});
// touchend with preventDefault to save textarea focus
// but iOS autocorrect doesn't update current word
// how to manually trigger autocorrect update?
b2.addEventListener("touchend", function(e) {
t2.value = '';
e.preventDefault();
});
Open example in any iOS device
Enter text in the first textarea, click Button 1. Textarea loses focus
Enter text in the second textarea, click Button 2. Textarea doesn't lose focus, but iOS autocorrect doesn't update own value.
I expect that after change value in textarea autocorrect suggest would be updated. How to manually trigger autocorrect update?
My solution is to allow textarea to lose its focus, and then focus on it again: http://output.jsbin.com/sihufuzigo
b2.addEventListener("click", function(e) {
t2.value = '';
t2.focus();
});
Note that iOS has limited the ability to focus() on fields programmatically: it could be done only from event handlers which are triggered by real user (real "click" event in this case) - see Mobile Safari: Javascript focus() method on inputfield only works with click? for more information

iOS Safari has a delay in showing elements on click if also focus() on input is called. How delay focus event?

iOS Safari (AFAIK) will not allow setting focus on an input in a setTimeout call. Only in a direct click event handler. The problem is this causes a delay in drawing the input (which was previously hidden). How can I make it draw the input and then focus (and pull up the keyboard)?
Example:
searchButton.addEventListener( "click", function() {
myInput.className = "showing"; //This tries to show the input
myInput.focus(); //This pulls the keyboard but delays drawing the input
});
If I put the focus event in a setTimeout call, it never executes. Are there any options?
Here's a demo: http://jsfiddle.net/vektgn3j/1/embedded/result/ (click the magnifying glass)

IE 10 - div with scrollbar fires blur event causing it to hide (custom code)

We are using W2UI (Javascript UI) controls. It has a "Multi Select" input control with associated div container with suggestion data. Whenever user clicks on input control a suggestion div is popped up and user can select multiple items from the list. Please find below screenshot
We have set overfloaw:auto of div When suggestion list has more than 10 records. (Refer below screenshot)
At this point, clicking on scrollbar works fine in Chrome and Mozilla but in case of IE it closes / hides the div.
We have made initial RCA of this as follow.
When a scrollbar is associated to a div, clicking on scrollbar causes blur event to fire for that div.
In W2UI library, blur event is used to hide the suggestion div causing it to close. We also found that, clicking on scrollbar does not cause blur event to fire in chrome & firefox.
Now we want to suppress blur event when user clicks on "scrollbar" in case of IE.
We are unable to identify scrollbar click.
Please share your thoughts / workarounds about suppressing blur() event conditionally.
I am also facing same issue we have made some changes in w2ui lbrary
we have set global variable flagClick first time it is false. & added below events
var div = $('#w2ui-global-items');
div.on('mouseover', function (event)
{
flagClick = false;
$('.w2ui-list').find('input').focus();
});
div.on('mouseout', function (event)
{
flagClick = true;
});
and changed blur event logic of div
as below --
.on('blur', function (event)
{
if (flagClick)
{
$(div).css('outline', 'none');
obj.hide();
if (event.stopPropagation) event.stopPropagation();
else event.cancelBubble = true;
}
})
almost this logic have solved our issue, except one .
When we click on search textbox then list will populate , if after that we click on list scroolbar and after that click on outside list div , List not getting hide (div blur event not getting fired).
try this solution , it will help u .
If you get solution to our problem pls post on same .
An updated version of w2ui came out just a few days ago where controls, including multiselect, have been refactored. It seems to work fine for me with 1.4 version.

PhoneGap: JavaScript Focus and Blur event in iOS / Android

I would like to detect the focus and blur event in HTML input text box in a PhoneGap mobile application.
For iOS, the behaviour is as expected - When the textbox is in focus (textbox is clicked), alert message Focus! is displayed. When the textbox loses focus (keyboard is closed / move on to next input box), alert message Blur! is shown.
However, for Android, when I click the textbox (the textbox is in focus), alert message Focus! and Blur! are displayed continuously which means that it is focus, blur, focus, blur, ...
How can this be avoided so that it can align with iOS?
In JavaScript:
var txtValue = document.getElementByID('txtValue');
txtValue.addEventListener('focus', function() {
alert('Focus!');
});
txtValue.addEventListener('blur', function() {
alert('Blur!');
});
In HTML:
<input type="text" id="txtValue" />
This is because when you show the alert, focus goes into that dialog, losing it from the input field and dispatching blur event. And when you close the dialog, focus goes back into input field, dispatching focus event.
I don't know the exact fix for this. Maybe using custom overlay dialog / lightbox instead of window.alert() could be one solution.
Other option could be comparing where the event is dispatched from, eg (not tested):
var txtValue = document.getElementById('txtValue');
txtValue.addEventListener('focus', function(evt) {
if (evt.nodeName && evt.nodeName.toLowerCase() === 'input') {
alert('focus!');
}
});

Clicking on a div's scroll bar fires the blur event in I.E

I have a div that acts like a drop-down. So it pops-up when you click a button and it allows you to scroll through this big list. So the div has a vertical scroll bar. The div is supposed to disappear if you click outside of the div, i.e. on blur.
The problem is that when the user clicks on the div's scrollbar, IE wrongly fires the onblur event, whereas Firefox doesn't. I guess Firefox still treats the scrollbar as part of the div, which I think is correct. I just want IE to behave the same way.
I've had a similar problem with a scrollbar in an autocomplete dropdown. Since the dropdown should be hidden when the form element it is attached to loses focus, maintaining focus on the correct element became an issue. When the scrollbar was clicked, only Firefox (10.0) kept focus on the input element. IE (8.0), Opera (11.61), Chrome (17.0) and Safari (5.1) all removed focus from the input, resulting in the dropdown being hidden, and since it was hidden, click events would not fire on the dropdown.
Fortunately, the shift of focus can be easily prevented in most of the problem browsers. This is done by canceling the default browser action:
dropdown.onmousedown = function(event) {
// Do stuff
return false;
}
Adding a return value to the event handler sorted out the problem on all browsers except IE. Doing this cancels the default browser action, in this case the focus shift. Also, using mousedown instead of click meant that the event handler would be executed before the blur event fired on the input element.
This left IE as the only remaining problem (no surprise there). It turns out that there is no way to cancel the focus shift on IE. Fortunately, IE is the only browser that fires a focus event on the dropdown, meaning focus on the input element can be restored with an IE-exclusive event handler:
dropdown.onfocus = function() {
input.focus();
}
This solution for IE is not perfect, but while the focus shift is not cancelable, this is the best you can do. What happens is that the blur event fires on the input, hiding the dropdown, after which focus fires on the now hidden dropdown, which restores focus on the input and triggers showing the dropdown. In my code it also triggers repopulating the dropdown, resulting in a short delay and loss of the selection, but if the user wants to scroll the selection is probably useless anyway, so I deemed this acceptable.
I hope this is helpful, even though my example is slightly different than in the question. From what I gathered, the question was about IE firing a blur event on the dropdown itself, rather than the button that opened it, which makes no sense to me... Like my use of a focus event handler indicates, clicking on a scrollbar should move focus to the element the scrollbar is part of on IE.
Late answer, but I had the same issue and the current answers didn't work for me.
The hover state of the popup element works as expected, so in your blur event you can check to see if your popup element is hovered, and only remove/hide it if it isn't:
$('#element-with-focus').blur(function()
{
if ($('#popup:hover').length === 0)
{
$('#popup').hide()
}
}
You'll need to shift focus back to the original element that has the blur event bound to it. This doesn't interfere with the scrolling:
$('#popup').focus(function(e)
{
$('#element-with-focus').focus();
});
This does not work with IE7 or lower - so just drop support for it...
Example: http://jsfiddle.net/y7AuF/
I'm having a similar problem with IE firing the blur event when you click on a scrollbar. Apparently it only happens n IE7 and below, and IE8 in quirksmode.
Here's something I found via Google
https://prototype.lighthouseapp.com/projects/8887/tickets/248-results-popup-from-ajaxautocompleter-disappear-when-user-clicks-on-scrollbars-in-ie6ie7
Basically you only do the blur if you know the person clicked somewhere on the document other than the currently focused div. It's possible to inversely detect the scrollbar click because document.onclick doesn't fire when you click on the scrollbar.
This is an old question but since it still applies to IE11 here is what I did.
I listen to the mousedown event on the menu and set a flag on this event. When I catch the blur event, if the mousedown flag is on, I set the focus back. Since Edge, FF and Chrome won't fire the blur event but will fire the mouseup event (which IE won't), I reset the mousedown flag on the mouseup for them (on the blur for IE).
mousedown: function (e) {
this.mouseddown = true;
this.$menu.one("mouseup", function(e){
// IE won't fire this, but FF and Chrome will so we reset our flag for them here
this.mouseddown = false;
}.bind(this));
}
blur: function (e) {
if (!this.mouseddown && this.shown) {
this.hide();
this.focused = false;
} else if (this.mouseddown) {
// This is for IE that blurs the input when user clicks on scroll.
// We set the focus back on the input and prevent the lookup to occur again
this.skipShowHintOnFocus = true; // Flag used to avoid repopulating the menu
this.$element.focus();
this.mouseddown = false;
}
},
That way the menu stays visible and user doesn't loose anything.
Use focusout, and focusin (IE specific events)
$(document).bind('focusout', function(){
preventHiding = false;
//trigger blur event
this.$element.trigger('blur');
});
$(document).bind('focusin', function(){
preventHiding = true;
});
$(document).bind('blur', function(){
// Did anyone want us to prevent hiding?
if (this.preventHiding) {
this.preventHiding = false;
return;
}
this.hide();
});
I had the same probleme. Resolved by putting the menu in a wrapping (bigger) div. With the blur applied to the wrapper, it worked!
Perhaps try adding the tabindex attribute set to -1 to the div node.
I don't think this is an IE issue.
It's more a case of how to design your interaction and where to handle which event.
If you have a unique css-class-accessor for the related target, canceling a blur event can be done by checking the classList of the event.relatedTarget for the element you want to allow or disallow to initiate the blur event. See my onBlurHandler from a custom autocomplete dropdown in an ES2015 project of mine (you might need to work around contains() for older JS support):
onBlurHandler(event: FocusEvent) {
if (event.relatedTarget
&& (event.relatedTarget as HTMLElement).classList.contains('folding-select-result-list')) {
// Disallow any blur event from `.folding-select-result-list`
event.preventDefault();
} else if (!event.relatedTarget
|| event.relatedTarget
&& !(event.relatedTarget as HTMLElement).classList.contains('select-item')) {
// If blur event is from outside (not `.select-item`), clear the suggest list
// onClickHandler of `.select-item` will clear suggestList as configured with this.clearAfterSelect
this.clearOptions(this.clearAfterBlur);
}
}
.folding-select-result-list is my suggestions-dropdown having 'empty spots' and 'possibly a scrollbar', where I don't need this blur event.
.select-item has it's own onClickHandler that fires the XHR-request of the selection, and closes the dropdown when another property of the component this.clearAfterSelect is true.

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