JavaScript/JavaScript_Dynamic_Web_With_DOM/QuerySelectorAll_Element_Selector.html at master · TheShubham-K/JavaScript · GitHub

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<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>&#x1F3F4;&#x200D;&#x2620;&#xFE0F; Complete Javascripts Course</title>
    <link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet"
        integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous" />
    <style>
        div .output {
            background-color: red;
        }
    </style>
</head>

<body>
    <br />
    <br />
    <center>
        <!-- <input type="text" id="item"> -->
        <br />
        <div id="wrapper">&#x1F4C3; &#x1F3EA; 👾</div>
        <br />
        <div id="message">Message 1</div>
        <div id="message1">Message 2</div>
        <div id="message">Message 1</div>
        <div class="output">Test Me 1</div>
        <div class="output">Test Me 2</div>
        <div id="pickme1">
            <div class="output highlight">Test Me 3</div>
        </div>
        <input type="text" name="queryStuff" id="queryStuff">
        <input type="button" class="btn btn-outline-warning" onclick="mySel()" value="Get Query">
        <div id="pickme2">
            <div class="output">Test Me 4</div>
            <div class="output">Test Me 5</div>
            <div class="output">Test Me 6</div>
        </div>
        <div class="output highlight">Test Me 7</div>
        <div class="output">Test Me 8</div>
        <div class="output">Test Me 9</div>
        <div class="output">Test Me 10</div>
    </center>
    <script>
        var el = document.querySelectorAll("div .output");

        function mySel() {
            var a = document.getElementById('queryStuff').value;
            var el = qs(a);
            var html = "Results<br>";
            for (var x = 0; x < el.length; x++) {
                html += el[x].innerText + "<br>";
            }
            document.getElementById('message').innerHTML = html;
        }

        function qs(el) {
            return document.querySelectorAll(el);
        }
    </script>

    <script src="https://code.jquery.com/jquery-3.5.0.js"
        integrity="sha256-r/AaFHrszJtwpe+tHyNi/XCfMxYpbsRg2Uqn0x3s2zc=" crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.bundle.min.js"></script>
</body>

</html>