CodeZilla CodeZilla - 4 months ago 17
Javascript Question

Custom autocomplete function in jquery

UPDATE

With the help and suggestions taken from the @Ziv Weissman and @Fribu I re-wrote the whole autocomplete function.

If anybody needs it he/she can download from here.

Thanks StackOverFlow community.




I am creating a jquery autocomplete function. The function that I created is working fine with single text box. But as soon as I am implementing it on another text box in same page it is behaving unexpectedly. It opens and closes the autocomplete list.

here is my code for autofill.js:

function setUl(result) {
var $ul = $('<ul>');
if (result !== undefined) {
$.each(result, function (k, v) {
$ul.append('<li data-value="' + v.value + '">' + v.label + '</li>');
});
}
return $ul;
}
$.fn.autofill = function (options) {
if (options == undefined) {
options = {};
}
var $currentInput = $(this);
var autoCompleteData = $currentInput.data('autofill');
var listId='autofill-' + (new Date().getTime()).toString(16);
$currentInput.on('keyup focus', function (e) {

var query = $(this).val();
var result = $.grep(autoCompleteData, function (v) {
return v.label.search(new RegExp(query, 'i')) !== -1;
});
$ul = setUl(result, $currentInput);
$ul.attr('id', listId);
$ul.addClass('autofill-show');
$ul.attr('data-target',$currentInput.attr('id'));
var position = $currentInput.position();
$ul.css({
width: $currentInput.width() + parseInt($currentInput.css('padding-left'), 10) + parseInt($currentInput.css('padding-right'), 10),
position: 'absolute',
top: position.top + $currentInput.outerHeight(),
left: position.left
});
if ($ul.find('li').length >= 6) {
$ul.css({
height: '130px',
'overflow-y': 'scroll'
});
}
if (result !== undefined) {
if ($(e.target).attr('id') !== $currentInput.attr('id') && $($(e.target).parent()[0]).attr('id') !== listId) {
destroy($ul);
}
$currentInput.after($ul);
}
$currentInput.trigger('onChange', [query, result]);
});
$(document).on('click', '.autofill-show li', function (e) {
if($ul!==undefined && $($(this).parent()[0]).attr('id')==$ul.attr('id')){
$ul.trigger('onSelect', [$(this).text(), $(this).data('value')]);
}
e.stopImmediatePropagation();
});
$(document).on('onSelect', '#'+listId,function (e, label, value) {
$currentInput.val(label);
if ($.isFunction(options.onSelect)) {
options.onSelect(label, value);
}
if ($(e.target).attr('id') !== $currentInput.attr('id') && $($(e.target).parent()[0]).attr('id') !== listId) {
destroy($ul);
}
e.stopImmediatePropagation();
});
$(document).on('onChange', '#'+$currentInput.attr('id'), function (e, query, result) {
if($ul!==undefined && $($(this).parent()[0]).attr('id')==$ul.attr('id')) {
result = $.grep(autoCompleteData, function (v) {
return v.label.search(new RegExp('\^' + query + '\$', "gi")) !== -1;
});
if ($.isFunction(options.onChange)) {
options.onChange(query, result[0]);
}
}
e.stopImmediatePropagation();
});
$(document).on('click', function (e) {
console.log($(e.target));
if ($(e.target).attr('id') !== $currentInput.attr('id') && $($(e.target).parent()[0]).attr('id') !== listId) {
destroy($ul);
}
e.stopImmediatePropagation();
});
};
function destroy($ul) {
$ul.remove();
}


Here is my css:

.autofill-show{
list-style: outside none none;
padding: 0;
border: 1px solid #ccc;
margin:0;
z-index: 9999999;
}
.autofill-show li{
border: 1px solid #ccc;
text-align: center;
background: #fff;
}

.autofill-show li:hover{
background: #9bcea3;
cursor: pointer;
}


And this is how I am calling my function:

$('#autofill').autofill();
$('#autofill_2').autofill();


Here is the fiddle link. https://jsfiddle.net/saineshmamgain/cs6g13q9/2/

Answer

As I mentioned, and others helped, this is a problem with your events and selectors.

One solution can be adding unique ID to the UL created, not "datetime based". Each time you will destory a specific ID, and recreate it. The events will be triggers via HTML (added onclick=...) and dealth with current/parent level with jQUERY.

I've updated this fiddle

It might have things that are leftovers from your fiddle which I don't have time to perfect... I'll leave it to you.

The solution looks something like this:

function setUl(result) {
    var $ul = $('<ul>');
    if (result !== undefined) {
        $.each(result, function (k, v) {
            $ul.append('<li data-value="' + v.value + '" onclick="clickHandle(this)">' + v.label + '</li>');
        });
    }
    return $ul;
}

function clickHandle(ele){
var label = $(ele).text();
var value = $(ele).data('value');
var inputId = $(ele).parent("ul").attr("data-target");
$('#'+inputId).val(label);
        if ($.isFunction(options.onSelect)) {
            options.onSelect(label, value);
        }
}

$.fn.autofill = function (options) {
    if (options == undefined) {
        options = {};
    }
    var $currentInput = $(this);
    console.log($($currentInput).attr('id'));
    var autoCompleteData = $currentInput.data('autofill');
    var listId='autofill_' + $currentInput.attr('id');
    $currentInput.on('keyup focus', function (e) {

        var query = $(this).val();
        var result = $.grep(autoCompleteData, function (v) {
            return v.label.search(new RegExp(query, 'i')) !== -1;
        });
        if($('#'+listId)){
          $('#'+listId).remove();
        }
        $ul = setUl(result, $currentInput);
        $ul.attr('id',listId);
        $ul.addClass('autofill-show');
        $ul.attr('data-target',$currentInput.attr('id'));
        var position = $currentInput.position();
        $ul.css({
            width: $currentInput.width() + parseInt($currentInput.css('padding-left'), 10) + parseInt($currentInput.css('padding-right'), 10),
            position: 'absolute',
            top: position.top + $currentInput.outerHeight(),
            left: position.left
        });
        if ($ul.find('li').length >= 6) {
            $ul.css({
                height: '130px',
                'overflow-y': 'scroll'
            });
        }
        if (result !== undefined) {
            destroy($ul);
            $currentInput.after($ul);
        }
        $currentInput.trigger('onChange', [query, result]);
    });  
    //end key up 

    $('#'+listId).on('onSelect',function (e, label, value) {
        $currentInput.val(label);
        if ($.isFunction(options.onSelect)) {
            options.onSelect(label, value);
        }
        destroy($ul);
        e.stopImmediatePropagation();
    });
    $(document).on('onChange', '#'+$currentInput.attr('id'), function (e, query, result) {
        if($ul!==undefined && $($(this).parent()[0]).attr('id')==$ul.attr('id')) {
            result = $.grep(autoCompleteData, function (v) {
                return v.label.search(new RegExp('\^' + query + '\$', "gi")) !== -1;
            });
            if ($.isFunction(options.onChange)) {
                options.onChange(query, result[0]);
            }
        }
        e.stopImmediatePropagation();
    });
    $currentInput.on('blur', function (e) {
        window.setTimeout(function(){
        destroy($ul);
        }, 100);
    });
};
function destroy($ul) {
    $ul.remove();
}
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