Array Iteration in JavaScript: Using reduce, reduceRight, every, and some

<!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>Array Iteration in JavaScript: Part 2</title>
    <style>
        section {
            display: flex;
            gap: 10;
            justify-content: space-between;
        }

        section div.col {
            width: calc(100% / 4);
        }

        section div.col > div {
            margin: 10px 0;
        }

        button { margin-bottom: 10px; }
    </style>
    <script>
        let num = [25, 45, 81, 64, 10, 46, 89, 49, 22, 40, 78, 62];

        const getReduce = () => {
            const sum = num.reduce((total, value, index, array) => total+value);
            document.getElementById('reduceData').innerHTML = 'Sum From Left Side: ' + sum;
        }

        const getReduceRight = () => {
            const sum = num.reduceRight((total, value, index, array) => total + value);
            document.getElementById('rRightData').innerHTML = 'Sum From Left Side: ' + sum;
        }

        const getEvery = () => {
            const allOver = num.every((value) => value > 50);
            document.getElementById('everyData').innerHTML = allOver;
        }

        const getSome = () => {
            const isTrue = num.some((value) => value < 80);
            document.getElementById('someData').innerHTML = isTrue;
        }
    </script>
</head>
<body>
    <section>
        <div class="col">
            <button type="button" onclick="getReduce()">Reduce Iteration</button>
            <div id="reduceData"></div>
        </div>
        <div class="col">
            <button type="button" onclick="getReduceRight()">Reduce Right Iteration</button>
            <div id="rRightData"></div>
        </div>
        <div class="col">
            <button type="button" onclick="getEvery()">Every Iteration</button>
            <div id="everyData"></div>
        </div>
        <div class="col">
            <button type="button" onclick="getSome()">Some Iteration</button>
            <div id="someData"></div>
        </div>
    </section>
</body>
</html>