jQuery autocomplete not always working on elements

Posted by PoweRoy on Stack Overflow See other posts from Stack Overflow or by PoweRoy
Published on 2010-06-15T08:51:01Z Indexed on 2010/06/15 8:52 UTC
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Filed under:

JavaScript

jQuery

dom

jquery-ui

I'm trying to create a greasemonkey script (for Opera) to add autocomplete to input elements found on a webpage but it's not completely working.

I first got the autocomplete plugin working:

// ==UserScript==
// @name           autocomplete
// @description    autocomplete
// @include        *
// ==/UserScript==

// Add jQuery
var GM_JQ = document.createElement('script');
GM_JQ.src = 'http://jquery.com/src/jquery-latest.js';
GM_JQ.type = 'text/javascript';
document.getElementsByTagName('head')[0].appendChild(GM_JQ);

var GM_CSS = document.createElement('link');
GM_CSS.rel = 'stylesheet';
GM_CSS.href = 'http://dev.jquery.com/view/trunk/plugins/autocomplete/jquery.autocomplete.css';
document.getElementsByTagName('head')[0].appendChild(GM_CSS);

var GM_JQ_autocomplete = document.createElement('script');
GM_JQ_autocomplete.type = 'text/javascript';
GM_JQ_autocomplete.src = 'http://dev.jquery.com/view/trunk/plugins/autocomplete/jquery.autocomplete.js';
document.getElementsByTagName('head')[0].appendChild(GM_JQ_autocomplete);

// Check if jQuery's loaded
function GM_wait() 
{
    if(typeof window.jQuery == 'undefined') 
    { 
        window.setTimeout(GM_wait,100); 
    }
    else 
    { 
        $ = window.jQuery; 

        letsJQuery(); 
    }
}
GM_wait();

function letsJQuery() 
{
    $("input[type='text']").each(function(index)
    {
        $(this).val("test autocomplete");
    });

    $("input[type='text']").autocomplete("http://mysite/jquery_autocomplete.php", {
        dataType: 'jsonp',
        parse: function(data) {
            var rows = new Array();
            for(var i=0; i<data.length; i++){
                rows[i] = { 
                    data:data[i], 
                    value:data[i], 
                    result:data[i] };
            }
            return rows;
        },
        formatItem: function(row, position, length) {
            return row;
        },
    });
}

I see the 'test autocomplete' but using the Opera debugger(firefly) I don't see any communication to my php page. (yes mysite is fictional, but it works here) Trying it on my own page:

<body>
no autocomplete: <input type="text" name="q1" id="script_1"><br>
autocomplete on: <input type="text" name="q2" id="script_2" autocomplete="on"><br>
autocomplete off: <input type="text" name="q3" id="script_3" autocomplete="off"><br>
autocomplete off: <input type="text" name="q4" id="script_4" autocomplete="off"><br>
</body>

This works, but when trying on another pages it sometimes won't: e.g. http://spitsnieuws.nl/ works but http://nu.nl and http://dumpert.nl don't work.

Trying the autocomplete of jquery ui has more problems:

// ==UserScript==
// @name           autocomplete
// @description    autocomplete
// @include        *
// ==/UserScript==

// Add jQuery
var GM_JQ = document.createElement('script');
GM_JQ.src = 'http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js';
GM_JQ.type = 'text/javascript';
document.getElementsByTagName('head')[0].appendChild(GM_JQ);

var GM_CSS = document.createElement('link');
GM_CSS.rel = 'stylesheet';
GM_CSS.href = 'http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/base/jquery-ui.css';
document.getElementsByTagName('head')[0].appendChild(GM_CSS);

var GM_JQ_autocomplete = document.createElement('script');
GM_JQ_autocomplete.type = 'text/javascript';
GM_JQ_autocomplete.src = 'http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js';
document.getElementsByTagName('head')[0].appendChild(GM_JQ_autocomplete);

// Check if jQuery's loaded
function GM_wait() 
{
    if(typeof window.jQuery == 'undefined') 
    { 
        window.setTimeout(GM_wait,100); 
    }
    else 
    { 
        $ = window.jQuery; 

        letsJQuery(); 
    }
}
GM_wait();

// All your GM code must be inside this function
function letsJQuery() 
{
    $("input[type='text']").each(function(index)
    {
        $(this).val("test autocomplete");
    });

    $("input[type='text']").autocomplete({
        source: function(request, response) {
            $.ajax({
                url: "http://mysite/jquery_autocomplete.php",
                dataType: "jsonp",
                success: function(data) {
                    response($.map(data, function(item) {
                        return {
                            label: item,
                            value: item
                        }
                    }))
                }
            })
        }
    });
}

This will work on my html page, http://spitsnieuws.nl and http://dumpert.nl but not on http://nu.nl. (dumpert didn't work on the plugin autocomplete)

//http://spitsnieuws.nl
<input class="frmtxt ac_input" type="text" id="zktxt" name="query" autocomplete="off">
//http://dumpert.nl
<input type="text" name="srchtxt" id="srchtxt">
//http://nu.nl
<input id="zoekfield" name="q" type="text" value="Zoek nieuws" onfocus="this.select()" type="text">

Anyone know why the autocomplete functionality doesn't work? Why the request to the php page is not being made? And why I can't add my autocomplete to google.com?

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