I have number of html <select> elements in webpages which displaying in the app (in UIWebView control). Some of them allow multiple choice. I need to perform action when user change something in the list. For multiple choice I need to perform action after user finish rearranging checkboxes and click on 'done'.
How it was implemented in iOS 6 (and works perfectly there):
<select onblur="alert('do something...');">...</select>
<select multiple='multiple' onblur="alert('do something...');">...</select>
iOS 7 issue:
<select onblur="alert('NOT ALWAYS WORK...');">...</select>
<select multiple='multiple' onblur="alert('NOT ALWAYS WORK...');">...</select>
<select onchange="alert('THIS WORKS');">...</select>
<select multiple='multiple' onchange="alert('WORKS BUT NOT AS EXPECTED');">...</select>
onblur doesn't work relyable anymore. It works only if there is some other textbox or dropdown below. If it's the only dropdown/textbox on the page, it doesn't fire.
I tried replace onblur to onchange, it works, but only for single choice. For multiple choice onchange fired when user change his selection, not when he finished (by clicking "done").
Any ideas how to solve this for both single and multiple dropdown lists in iOS 7?
Maybe I missed something obvious?
I found the solution. If load following HTML in UIWebView in iOS 7 (not Safari), the onblur event doesn't work:
<html>
<head>
<meta name='viewport' content='initial-scale=1.0,maximum-scale=10.0'/>
</head>
<body>
<table style='height:80%'><tr><td>
<select onblur="alert('blur')" >
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
</td></tr></table>
</body>
</html>
The important components: viewport, table with some height defined, select inside this table.
If remove table OR remove height style OR remove viewport, then onblur works.
I can't explain this effect, but I just remove table height style and it works. Maybe it helps somebody.
Related
I have a dropdown list which I created on Google Sites (I'm too poor for better hosting) and I have a little problem. Clicked option opens in iframe instead in current tab. I'm using this code:
<div align="center">
<select name="select" style="width:400px; align:center;" onchange="window.open(this.options[this.selectedIndex].value,'_self')">
<option value="0">SOME TEXT</option>
<option value="https://www.reddit.com ">OPTION 1</option>
</select>
</div>
I would love to be able to open an URL option in current tab. I tried using "_self", "_blank", "_parent" and "_top" attributes, but only "_blank" works. I also made a test website with four droplists. As you see, only _blank works properly.
https://sites.google.com/view/droplists/
(and this: https://codepen.io/KogucikPL/pen/ZEpZaJJ )
How I can edit this code to get it to work properly? Thanks in advance.
If a <select> element has a selected option, Chrome will ignore that selected option even if autocomplete="off" on the <select> element when using the browser's "navigate back" functionality. One workaround I have found is wrapping the select in a <form>, but I don't want extraneous forms in my html.
Question: Is there a way to fix this in Chrome without wrapping in a form element? (This behavior does not occur in Firefox, haven't tested other browsers)
To reproduce, using Chrome 77:
1.) Visit this jsfiddle, and change both selects to "One". Note that "Two" is the selected option for both, so when the page loads this is what should be selected in both elements
2.) Click on the link to google (page navigation won't actually occur, jsfiddle output can't actually navigate to webpages)
3.) With your mouse having clicked in jsfiddle output, click the browser's back button
4.) You'll note that the select element which is wrapped in a form has the correct element selected by default, "Two". The select element which is not wrapped in a form has the incorrect element selected, "One"
https://jsfiddle.net/m5hg8n40/1/
<!-- chrome ignores 'selected' -->
<select autocomplete="off">
<option value="1">One</option>
<option value="2" selected>Two</option>
</select>
<br><br>
google.com
<br><br>
<!-- chrome obeys 'selected' -->
<form autocomplete="off">
<select>
<option value="1">One</option>
<option value="2" selected>Two</option>
</select>
</form>
MAC OS Catalina 10.15
Browsers
Google Chrome Version 77.0.3865.120 (Official Build) (64-bit)
Safari Version 13.0.2 (15608.2.30.1.1)
Firefox 70.0
Actions tested:
Onload the jsfiddle i see both with the two option selected
If i click google link and go back, both keeps two selected
If i modify first select (without form) to one, go google and go
back, it keeps the one selected
If i modify the second select (with form) to one, go google, and go
back, it will show the two option selected
So as far as i see.
On load works for both, but the window History treats slightly different both input select, if they are wrapped or not in a <form>tag
One will keep the last action executed, and the other will take priority of the form to reset its inputs to the default state.
Excepcion: Firefox treat both with the same behavior (like without the form)
For me it seems legit to use the tag there if you need it, they can be use to collect data even if they are going to be used locally or remotely.
( is not worse than pages having 1047248 <div>'s everywhere and zero semantic HTML ) so its really up to you i think. And if you need to store data in another way you could use LocalStorage
I think you can't do anything without js.
<body onload="document.querySelector('select').value = document.querySelector('select [selected]').value">
<select>
<option value="1">One</option>
<option value="2" selected>Two</option>
</select>
<br><br>
google.com
<br><br>
<form autocomplete="off">
<select>
<option value="1">One</option>
<option value="2" selected>Two</option>
</select>
</form>
</body>
I have a simple form with some select options that need to do stuff when the options are changed (create new form elements). This all works fine, however when a select option is chosen and the user clicks elsewhere on the page (either another form option or a blank area of the page) the text of the chosen option remains highlighted blue.
I've used select's before and not had this problem, however they weren't linked to the .change function. Is that something to do with why this is happening? Has anybody encountered this issue before? All help greaty appreciated! Code is below...
<div id="container1" class="form-group">
<label class="control-label">Select an option</label>
<div>
<select class="form-control" id="mySelect">
<optgroup label="A">
<option value="1A">Option1A</option>
<option value="2A">Option2A</option>
<option value="3A">Option3A</option>
<option value="4A">Option4A</option>
</optgroup>
<optgroup label="B">
<option value="1B">Option1B</option>
<option value="2B">Option2B</option>
<option value="3B">Option3B</option>
<option value="4B">Option4B</option>
</optgroup>
</select>
</div>
</div>
I've seen the issue brought up here
Remove Blue highlighting of option
However I don't think this quite describes my problem, as it seems to me that that person wants to remove the blue highlighting whilst using the form (hard to be 100% sure though). I don't mind the blue highlighting being there when using the form, I just want it to stop persisting when you stop using the form and do something else on the page.
UPDATE: Problem only seems to occur in Internet Explorer (tested versions 9, 10 and 11). Tested in Chrome and issue doesn't occur. Just to elaborate on the comments, the issue has nothing to do with JS (so I have removed the JQuery code and subsequent tags). The issue occurs when using optgroups in a select form. Loading the HTML outlined above into IE produces the error.
I have a very simple select drop down. In Chrome, it doesn't drop down. The code itself works fine, and the drop down works in Safari, but for some reason it won't open in Chrome. Here is the HTML:
<select name="pellet_credit" class="item_discount">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
It should be pretty simple. It's a dropdown... Here's a screenshot of the select, selected, but not open:
--- edit ---
This is a jsfiddle with the full source included. The dropdown works for me in the jsfiddle view, but not on the actual site.
http://jsfiddle.net/HSYvf/
--- edit ---
Other drop downs on the page work fine.
Validate your HTML to make sure there aren't extraneous closing/end tags. Make sure you aren't hiding the options through CSS as well.
I had the same problem with Firefox and Chrome and due to the z-index of the form being -1.
When changed the z-index, it worked fine.
This happened to me when I put a <select> inside a jQuery .sortable() element. I copied this code right off the jQuery website, and the .disableSelection() method call killed my <select>.
$(function() {
$( "#sortable" ).sortable();
$( "#sortable" ).disableSelection();
});
Once I removed the .disableSelection(); (which oddly enough they've deprecated...) everything worked just fine.
I think you should set a value for your options
<select>
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="mercedes">Mercedes</option>
<option value="audi">Audi</option>
</select>
you can read more here
what ended up happening to me that caused me to be on this page is that display was set to display:none; on the option elements
solution:
$(yourdropdown).children().show();
We had a crazy problem when we were developing a client/server programming language which had a listbox. Although INPUT worked the listbox didn't. We have mouse tracking on it and by a bug the $(window).mousedown... was being enabled by default.
We were able to track the problem with this page: https://hackernoon.com/finding-that-pesky-listener-thats-hijacking-your-event-javascript-b590593f2a83
Just in case the above page disappears:
In Chrome (possibly other Chromium flavours [works on Opera too]):
Right click on element.
Click 'Inspect...'
When the 'Elements' are shown, the right panel will have [Styles][Computed][Event Listeners] (tabs). Click on 'Event Listeners'.
Look for 'mouseup', 'mousedown', 'keyup', etc and expand what you suspect and remove it to see if that fixes the problem (debug).
Change the code.
What we did was change the 'return false' to 'return true' in our code.
To debug such issues try removing all attributes from the html and add them one at a time to find out what is causing the issue.
For example, the snippet below does not work as needed.
<select size="10">
<option value=1>1</option>
<option value=2>2</option>
<option value=3>3</option>
</select>
Removing the size attribute fixes it
<select >
<option value=1>1</option>
<option value=2>2</option>
<option value=3>3</option>
</select>
I'm adding an answer just to call out the comment by #Agos in the selected answer. Check if you have event handling code (mousedown, click, etc.) that might be stealing the events from the dropdown.
The problem for me was that I had included class names in the id declaration.
For future audience, notice in particular if your select element is inconsistent with the surrounding form styles. This is a likely clue that a class isn't being applied correctly, and you may have accidentally placed it in the wrong spot.
I have the following HTML code:
<select name="forma">
<option value="Home">Home</option>
<option value="Contact">Contact</option>
<option value="Sitemap">Sitemap</option>
</select>
How can I make Home, Contact and Sitemap values as links?
I used the following code and as I expected it didn't work:
<select name="forma">
<option value="Home">Home</option>
<option value="Contact">Contact</option>
<option value="Sitemap">Sitemap</option>
</select>
UPDATE 2022: This answer is fine but really in 2022 we shouldn't be doing this anymore!
UPDATE (May 2020): Someone asked in the comments why I wouldn't advocate this solution. I guess it's a question of semantics. I'd rather my users navigate using <a> and kept <select> for making form selections because HTML elements have semantic meeting and they have a purpose, anchors take you places, <select> are for picking things from lists.
Consider, if you are viewing a page with a non-traditional browser (a non graphical browser or screen reader or the page is accessed programmatically, or JavaScript is disabled) what then is the "meaning" or the "intent" of this <select> you have used for navigation? It is saying "please pick a page name" and not a lot else, certainly nothing about navigating. The easy response to this is well i know that my users will be using IE or whatever so shrug but this kinda misses the point of semantic importance.
Whereas a funky drop-down UI element made of suitable layout elements (and some js) containing some regular anchors still retains it intent even if the layout element is lost, "these are a bunch of links, select one and we will navigate there".
Here is an article on the misuse and abuse of <select>.
ORIGINAL ANSWER
<select name="forma" onchange="location = this.value;">
<option value="Home.php">Home</option>
<option value="Contact.php">Contact</option>
<option value="Sitemap.php">Sitemap</option>
</select>
UPDATE (Nov 2015): In this day and age if you want to have a drop menu there are plenty of arguably better ways to implement one. This answer is a direct answer to a direct question, but I don't advocate this method for public facing web sites.
You cant use href tags within option tags. You will need javascript to do so.
<select name="formal" onchange="javascript:handleSelect(this)">
<option value="home">Home</option>
<option value="contact">Contact</option>
</select>
<script type="text/javascript">
function handleSelect(elm)
{
window.location = elm.value+".php";
}
</script>
Use a real dropdown menu instead: a list (ul, li) and links. Never misuse form elements as links.
Readers with screen readers usually scan through a automagically generated list of links – the’ll miss these important information. Many keyboard navigation systems (e.g. JAWS, Opera) offer different keyboard shortcuts for links and form elements.
If you still cannot drop the idea of a select don’t use the onchange handler at least. This is a real pain for keyboard users, it makes your third item nearly inaccessible.
The accepted solution looks good, but there is one case it cannot handle:
The "onchange" event will not be triggered when the same option is reselected. So, I came up with the following improvement:
HTML
<select id="sampleSelect" >
<option value="Home.php">Home</option>
<option value="Contact.php">Contact</option>
<option value="Sitemap.php">Sitemap</option>
</select>
jQuery
$("select").click(function() {
var open = $(this).data("isopen");
if(open) {
window.location.href = $(this).val()
}
//set isopen to opposite so next time when use clicked select box
//it wont trigger this event
$(this).data("isopen", !open);
});
(I don't have enough reputation to comment on toscho's answer.)
I have no experience with screen readers and I'm sure your points are valid.
However as far as using a keyboard to manipulate selects, it is trivial to select any option by using the keyboard:
TAB to the control
SPACE to open the select list
UP or DOWN arrows to scroll to the desired list item
ENTER to select the desired item
Only on ENTER does the onchange or (JQuery .change()) event fire.
While I personally would not use a form control for simple menus, there are many web applications that use form controls to change the presentation of the page (eg., sort order.) These can be implemented either by AJAX to load new content into the page, or, in older implementations, by triggering new page loads, which is essentially a page link.
IMHO these are valid uses of a form control.
The <select> tag creates a dropdown list. You can't put html links inside a dropdown.
However, there are JavaScript libraries that provide similar functionality. Here is one example: http://www.dynamicdrive.com/dynamicindex1/dropmenuindex.htm
<select name="career" id="career" onchange="location = this.value;">
<option value="resume" selected> All Applications </option>
<option value="resume&j=14">Seo Expert</option>
<option value="resume&j=21">Project Manager</option>
<option value="resume&j=33">Php Developer</option>
</select>
I'm sure someone can make a better answer than this with Jquery where the change in the dropdown will lead to a new page (good for navigation control on a navbar).
<td><select name="forma" id='SelectOption'>
<option value="Home">Home</option>
<option value="Contact">Contact</option>
<option value="Sitemap">Sitemap</option>
</select></td><td>
document.getElementById('SelectOption').addEventListener('change', function() {
val = $( "#SelectOption" ).val();
console.log(val)
if(val === 'Home') {
window.open('home.php','_blank');
}
if(val === 'Contact') {
window.open('contact.php', '_blank');
}
if (val === 'Sitemap') {
window.open('sitemap.php', '_blank');
}
});