I get a .focus() problem with JQUERY MOBILE

jquery jquery-ui jquery-plugins jquery-selectors jquery-mobile

21,827

Solution 1

pagecreate event fires before JQM does some changes to DOM so I suppose the focus is lost then.

Try switching to pageshow, especially because you want to get the focus everytime user gets to a page.

If it still doesn't work (there was such a case) wrap the code that triggers focus in a timeout (yes, it's a hack :) )

setTimeout(function(){
 $('#cache').focus();
},0);

This is a hack, but it does not depend on waiting a time interval. setTimeout() adds the function to rendering thread's queue (which is what runs javascript and page rendering in the browser) after the given time. So in this case the function is added instantly, so it runs after the current flow of javascript code finishes. So it's a way to make some code run right after the event handler ends. So this is not as hacky as one might think. I call it a hack, because it's using knowledge about how the browser works and it obscures the flow of code execution.

I recommend reading about how javascript execution and page drawing are handled by the same queue in a single thread. To anybody working with more than 20 lines of javascript.

I am quite sure that there is only one better solution - fix it in jQuery Mobile framework itself.

Solution 2

If you are using HTML5 then use autofocus attribute.

  <body>
    <div data-role="page" id ="acceuil" >
        <div data-role="header" data-theme="a" ><h3>aaa</h3></div>
        <div data-role="content">
            <input id="cache" type="input" autofocus>    
            <input type="button" id="declencher" value="declencher">
        </div><!-- content-->
        <div data-role="footer" data-theme="a" data-position="fixed"><h3> Footer       </h3></div>
    </div>
</body>

Please refer Autofocus attribute of HTML5

Solution 3

try this one, it works on my mobile Safari, Chrome and also desktop browser

// div is some selected element
            var f = function(event) {
                $timeout(function() { // angular way, setTimeout is OK
                    input[0].focus();
                    event.preventDefault();
                })
            };

            var mobile = false;
            div.on('click', function(event) {
                if(mobile) return;
                f(event);
            });

            div.on('touchstart', function(event) {
                mobile = true;
                f(event);
            });

            div.on('touchend', function(event) {
                event.preventDefault();
                event.stopPropagation();
            });

21,827

Author by

Wassim Sboui

Updated on July 09, 2022

Comments

Wassim Sboui almost 2 years

I think that focus event doesn't work with JQuery mobile: here is my code. (when I delete the call to the library jquery mobile, it works)

<!DOCTYPE html>
<html>
    <head>
        <link rel="stylesheet" href="http://code.jquery.com/mobile/1.0b2/jquery.mobile-1.0b2.min.css" />
        <script src="http://code.jquery.com/jquery-1.6.2.min.js"></script>
        <script src="http://code.jquery.com/mobile/1.0b2/jquery.mobile-1.0b2.min.js"></script>
    </head>
    <script type="text/javascript">
        $(document).ready(function() {
            $('#acceuil').live('pagecreate', function(event) {
                $('#declencher').click(function() {
                    $('#cache').focus();
                });
                $('#declencher').trigger('click');
            });
        });
    </script>
    <body>
        <div data-role="page" id ="acceuil" >
            <div data-role="header" data-theme="a" ><h3>aaa</h3></div>
            <div data-role="content">
                <input id="cache" type="input">    
                <input type="button" id="declencher" value="declencher">
            </div><!-- content-->
            <div data-role="footer" data-theme="a" data-position="fixed"><h3> Footer </h3></div>
        </div>
    </body>

</html>

mfalto over 12 years

i have been struggling to find a more elegant solution to this issue. This DOES work, but figure on different hardware this hack may be work inconstantly. I have tried the full gamut of jquery mobile built in events. The best i can achieve without this hack is to enable the "halo" (glow effect) on the field which is focused. The cursor is not displayed thou. Anyone have any other ideas?
naugtur over 12 years

It might get broken in some future browsers, but it's highly unlikely.
naugtur about 11 years

@SaurabhLP are you sure you tried using the pageshow event not just timeout? could you link to code?
naugtur about 11 years

@SaurabhLP You are not using pageshow event. setTimeout part of my answer is just an additional precaution. Your problem is not at all related to this question. you have an input with an id and your selector is .search, that's all.