how to implement search functionality in javascript for phonegap?

Question

I want to implement a search functionality in java script.I am new to java script.if i have committed any blunder in the code below forgive me.

How should I implement it?

I tried implementing like this

javascript

$("#input").keyup(function() {
var userInput = $(this).val();
$("#list div").map(function(index, value) {
    $(value).toggle($(value).text().toLowerCase().indexOf(userInput) >= 0);
});

});

BUT,CORDOVA EITHER DOES NOT RECOGNIZE $...SO WHEN i IMPLEMENTED IT LIKE THIS

document.getElementById("input").keyup(function() {
                var userInput = val();
                document.getElementById("main div").map(function(index, value) {
                document.getElementById(value).toggle(document.getElementById(value).text().toLowerCase().indexOf(userInput) >= 0);

NOW, I GET an error as

05-30 11:59:18.500: INFO/Web Console(930): JSCallback Error: TypeError: Result of expression 'document.getElementById("input").keyup' [undefined] is not a function. at file:///android_asset/www/cordova-2.1.0.js:3727

html

<input type="text" id="input"/>
<div id="list">
<div>Rich</div>
<div>Rajim</div>
<div>vimal</div>
<div>RAGHU</div>
</div>

Please,suggest me a solution to work on.

Answer 1

The problem is that you're not including JQuery. As soon as you include it, it works. jsfiddle here: http://jsfiddle.net/Y49EW/

$("#input").keyup(function () {
    var userInput = $(this).val();
    console.log("here");
    $("#list div").map(function (index, value) {
        $(value).toggle($(value).text().toLowerCase().indexOf(userInput) >= 0);
    });
});

To include jQuery:

1) download jquery (choose a version) from here: http://jquery.com/download/

2) add this into the head tag of your html page

 <script type="text/javascript" src="jquery-versionyouchoosed.js"></script>

For example, if you are using 1.9.1 version, you need to use-

 <script type="text/javascript" src="jquery-1.9.1.js"></script>