Javascript/task 20.html at main · azarcoder/Javascript · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        table
        {
            border: 1px solid #333;
            background-color: #dddddd;
            font-family: sans-serif;
        }
        th
        {
            font-size: 22px;
        }
        input[type="button"]
        {
            width: 100px;
            border: none;

        }
        input[type="text"]
        {
            width: 300px;
            background-color: rgb(175, 175, 175);
            border-radius: 3px;
            border: none;
        }
        input[type="text"]:focus
        {
            background-color: rgb(99, 98, 98);
            color: #fff;
        }
        .eval
        {
            background-color: rgb(206, 184, 60);
            border: none;
        }
        .c
        {
            background-color: rgb(172, 50, 50);
            border: none;
        }
        .pm
        {
            background-color: rgb(64, 64, 170);
            color: #fff;
        }
        .c:hover
        {
            background-color:red;
            border: none;
        }
        .pm:hover
        {
            background-color:blue;
            color: #fff;
        }
        .eval:hover
        {
            background-color:gold;
            border: none;
        }
    </style>
</head>
<body>
    <table>
        <tr>
            <th colspan="4">TEQ Calc</th>
        </tr>
        <tr>
            <td colspan="3"><input type="text" name="" id="inp"></td>
            <td><input type="button" value="C" class="c" onclick="n.clr()"></td>
        </tr>
        <tr>
            <td><input type="button" value="1" onclick="n.view(1)" id="result"></td>
            <td><input type="button" value="2" onclick="n.view(2)"></td>
            <td><input type="button" value="3" onclick="n.view(3)"></td>
            <td><input type="button" value="/" class="pm" onclick="view('/')"></td>
        </tr>
        <tr>
            <td><input type="button" value="4" onclick="n.view(4)" ></td>
            <td><input type="button" value="5" onclick="n.view(5)"></td>
            <td><input type="button" value="6" onclick="n.view(6)"></td>
            <td><input type="button" value="-" class="pm" onclick="n.view('-')"></td>
        </tr>
        <tr>
            <td><input type="button" value="7" onclick="n.view(7)"></td>
            <td><input type="button" value="8" onclick="n.view(8)"></td>
            <td><input type="button" value="9" onclick="n.view(9)"></td>
            <td><input type="button" value="+" class="pm" onclick="n.view('+')"></td>
        </tr>
        <tr>
            <td><input type="button" value="." onclick="n.view('.')"></td>
            <td><input type="button" value="0" onclick="n.view(0)"></td>
            <td><input type="button" value="=" class="eval" onclick="n.compute()"></td>
            <td><input type="button" value="*" class="pm" onclick="n.view('*')"></td>
        </tr>
    </table>
    <script>
        class calculator
        {

            view(n)
            {
                document.getElementById('inp').value+=n
            }
            clr()
            {
                document.getElementById('inp').value=''
            }
            compute()
            {
                var x=document.getElementById('inp').value
                let y=eval(x)
                document.getElementById('inp').value=y
            }
        }
        let n= new calculator()
    </script>
</body>
</html>