How to differentiate button colors using javascript

Question

1.00/5 (1 vote)

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HTML

<button class="cl" id="1" >Try it</button>

JavaScript

var buttonId = 0;
var classId = 0;

function myFunction()
{

    for (i = 0; i < 10; i++)
    {
        var btn = document.createElement("BUTTON");
        btn.style.backgroundColor = "F093F5";
        btn.setAttribute("id", "btn" + buttonId);
        btn.setAttribute("class", "class" + classId);

         btn.addEventListener('click', keyFunction);
        btn.innerText = "click" + buttonId;
        btn.innerText = "click" + classId;
        console.log(btn);
        document.body.appendChild(btn);

        buttonId++;
        classId++;

    }
}

{
    var colors = ["#ea4747", "#eaa947", "#c9ea47", "#68ea47"];
    function keyFunction(event)
    {
        event.target.style.backgroundColor = "#D3D578";
        var id = event.target.id.replace("btn", "") * 1;
        event.target.style.backgroundColor = colors[id % 10];


}
}

What I have tried:

I did Generating 10 buttons at once for every click event that contains unique class and id.. And asking help for differentiate last clicked buttons and visited buttons not visited buttons.. What logic to do this?

Posted 5-May-16 0:36am

Prasath 1992

Updated 5-May-16 0:58am

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Karthik_Mahalingam · Accepted Answer · 2016-05-05T00:58:00

Try this

HTML

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
    <script>
        var buttonId = 0;
        var classId = 0;
        var visitedbuttons = [];
        var lastbutton;

       
        function myFunction() {

            for (i = 0; i < 10; i++) {
                var btn = document.createElement("BUTTON");
                btn.style.backgroundColor = "F093F5";
                btn.setAttribute("id", "btn" + buttonId);
                btn.setAttribute("class", "class" + classId);

                btn.addEventListener('click', keyFunction);
                btn.innerText = "click" + buttonId;
                btn.innerText = "click" + classId;
                console.log(btn);
                document.body.appendChild(btn);

                buttonId++;
                classId++;

            }
        }

        {
            var colors = ["#ea4747", "#eaa947", "#c9ea47", "#68ea47"];
            function keyFunction(event) {
               
                event.target.style.backgroundColor = "#D3D578";
               // var id = event.target.id.replace("btn", "") * 1;
                event.target.style.backgroundColor = colors[Math.floor(Math.random() * 3) + 1];
               
                for (var i = 0; i < visitedbuttons.length; i++) {
                    visitedbuttons[i].style.backgroundColor = 'brown';
                }
                if (lastbutton != null)
                    lastbutton.style.backgroundColor = 'yellow';

                lastbutton = event.target;
                visitedbuttons.push(lastbutton);
                 
            }
        }
       


    </script>
</head>
<body>

</body>
</html>