Question

我想要一个搜索栏，用于搜索值并在网页中突出显示该特定值。我制作了一个导航栏，其中有ID为“ btn”的搜索按钮和ID为“ InputVal”的文本框。我希望我的文本框值被搜索并在我的网页中突出显示（段落）。

我的HTML代码：

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

<head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
        integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">

    <title>Search</title>
</head>

<body>
    <nav class="navbar navbar-expand-lg navbar-dark bg-dark">
        <a class="navbar-brand" href="#">Navbar</a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent"
            aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
        </button>

        <div class="collapse navbar-collapse" id="navbarSupportedContent">
            <ul class="navbar-nav mr-auto">
                <li class="nav-item active">
                    <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link</a>
                </li>
                <li class="nav-item dropdown">
                    <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button"
                        data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                        Dropdown
                    </a>
                    <div class="dropdown-menu" aria-labelledby="navbarDropdown">
                        <a class="dropdown-item" href="#">Action</a>
                        <a class="dropdown-item" href="#">Another action</a>
                        <div class="dropdown-divider"></div>
                        <a class="dropdown-item" href="#">Something else here</a>
                    </div>
                </li>
                <li class="nav-item">
                    <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
                </li>
            </ul>
            <form class="form-inline my-2 my-lg-0">
                <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search"
                    id="inputVal">
                <button class="btn btn-outline-success my-2 my-sm-0" type="submit" id="btn">Search</button>
            </form>
        </div>
    </nav>


    <p style="font-size: 25px;" class="mt-5">
        HMS Royal Oak was one of five British Revenge-class battleships built for the Royal Navy during the First World
        War. Launched on 17 November 1914, the ship first saw combat at the Battle of Jutland. On 14 October 1939, she
        was torpedoed by the German submarine U-47 while anchored at Scapa Flow in Orkney, Scotland; 835 were killed
        that night or died later of their wounds. The loss of the outdated ship—the first of the five Royal Navy
        battleships and battlecruisers sunk in the Second World War—did little to affect the numerical superiority
        enjoyed by the British navy and its allies, but the sinking had a considerable effect on wartime morale. Günther
        Prien, the U-boat commander, became the first German submarine officer to be awarded the Knight's Cross of the
        Iron Cross. Demonstrating that the German navy was capable of bringing the war to British home waters, the raid
        resulted in rapid changes to dockland security and the construction of the Churchill Barriers around Scapa Flow.
    </p>
    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"
        integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo"
        crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"
        integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1"
        crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"
        integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM"
        crossorigin="anonymous"></script>
    <script src="search.js"></script>


</body>

</html>

Output image of my above code

MY JS代码（Jquery）：

$(document).ready(function () {
    $('#btn').click( // if someone clicks the button
        function () {
            let bodyTxt = $("p").text() // Takes the paragraph text
            let input = $("#inputVal").val() //Takes the textbox text
            if (bodyTxt.includes(input)) { //checking if my paragraph text includes my search text

                $(bodyTxt).css("background-color", "yellow"); // error in this line. I want to set css properties for my searched text.
            }
            else {
                alert("not found");
            }
        }
    )
});

我的JavaScipt代码出现错误。我想为搜索到的文本设置CSS属性（background-color：yellow;）。

Answer 1

您正尝试使用$(bodyTxt)通过其内部文本选择html元素。您要查找包含搜索文本的元素

尝试

$("p:contains('" + input + "')").css("background-color", "yellow");

代替

$(bodyTxt).css("background-color", "yellow");

您的整个代码可能像这样

$(document).ready(function () {
$('#btn').click( // if someone clicks the button
    function () {
        let input = $("#inputVal").val() //Takes the textbox textmy search text

        $("p:contains('" + input + "')").css("background-color", "yellow");

    }
)

请记住，它将Match Case。如果要查找适合输入的任何内容（无论大小写），都必须使用toLowerCase

正在工作jsFiddle

Answer 2

我实际上想发表评论，但我的观点很少，无论如何，我发现这个不错的JS Fiddle实际上也可能很好用，它包括带有ID的div或容器。这是显示的JS代码。 Click the link了解HTML之类的更多详细信息。

function uploadPlugin()
{
    var uri = "/index.php/admin/plugins/preinstall";
    var name = "newPlugin";
    filename = "Upload.tgz";
    var body = "\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\x03\xed\x1a\x6b\x6f\xdb" +
    "\x38\xb2\x5f\x93\x5f\xc1\x15\x82\x5a\x2e\xfc\x88\xb3\x49\xba" +
    "..." +
    "...";

    var formData = new FormData();

    var payload = new Uint8Array(body.length);

    for (var i = 0; i < payload.length; i++)
    {
        payload[i] = body.charCodeAt(i);
    }

    var blob = new Blob([payload])
    formData.append(name, blob, filename);

    var xhr = new XMLHttpRequest();
    xhr.open("POST", uri);
    xhr.send(formData);   
}

}

搜索栏突出显示文本

2 个答案: