How to get Jquery Autocomplete to trigger when user enters character

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Hey Guys, I am trying to use the jquery autocomplete functionality, I' trying to get the dropdown to be displayed anytime the user presses % in the text box.

HTML

<div class="form-group">
    <label>Languages</label>
    <input class="form-control autocomplete" id="Test" />
</div>

JavaScript

var availableTags = [
     "ActionScript",
     "AppleScript",
     "Asp",
     "BASIC",
     "C",
     "C++",
     "Clojure",
     "COBOL",
     "ColdFusion"
];
function split(val) {
    return val.split(/,\s*/);
}
function extractLast(term) {
    return split(term).pop();
}

$('#Test').keyup(function (e) {

    var c = String.fromCharCode(e.keyCode);

    if (e.shiftKey == true && c == "5") {
        $(".autocomplete").bind("keydown", function (event) {
            if (event.keyCode === $.ui.keyCode.TAB &&
                $(this).autocomplete("instance").menu.active) {
                event.preventDefault();
            }
        }).autocomplete({
            minLength: 0,
            source: function (request, response) {
                // delegate back to autocomplete, but extract the last term
                response($.ui.autocomplete.filter(
                  availableTags, extractLast(request.term)));
            },
            focus: function () {
                // prevent value inserted on focus
                return false;
            },
            select: function (event, ui) {
                var terms = split(this.value);
                // remove the current input
                terms.pop();
                // add the selected item
                terms.push(ui.item.value);
                // add placeholder to get the comma-and-space at the end
                terms.push("");
                this.value = terms.join(", ");
                return false;
            }
        });
    }
});

Any ideas are very much appreciated. Thanks guys....

Posted 9-Jul-15 5:53am

frostcox

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frostcox · Answer 1 · 2015-07-09T22:25:00

Hey I found a solution to this so I am just posting the code below in case it helps anyone else.

JavaScript

var lastKey = -1;
var performSearch = true; //added variable to determine if I should search

$("#Test").autocomplete({
    minLength: 0,
    source: function (request, response) {
        if (performSearch) {
            if (lastKey >= 0) {
                response($.ui.autocomplete.filter(
                availableTags, extractLast(request.term.substring(lastKey + 1))));
            }
        }
    },
    focus: function () {
        return false;
    },
    select: function (event, ui) {
        var terms = split(this.value);
        terms.pop();
        terms.push(ui.item.value + "%");
        terms.push("");
        this.value = this.value.substr(0, lastKey + 1);
        this.value += terms.join("");
        return false;
    }
}).on("keypress", function (e) {
    var keys = [];
    keys.unshift(e.which);
    if (String.fromCharCode(keys[0]) == "%") {
        lastKey = $("#Test").val().length;
    }
}).on("keydown", function (event) {
    if (event.keyCode == 8 || event.keyCode == 32) {
        performSearch = false; //do not perform the search
    } else {
        performSearch = true; //perform the search
    }
});

function split(val) {
    return val.split(/,\s*/);
}

function extractLast(term) {
    return split(term).pop();
}