我想要一个搜索栏来搜索值并在我的网页中突出显示该特定值。我制作了一个导航栏，其中有一个 ID 为“btn”的搜索按钮和一个 ID 为“InputVal”的文本框。我希望搜索我的文本框值并在我的网页(段落)中突出显示。
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 The loss of the outdated ship—the first of the five Royal Navy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>
我的 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 代码中出现错误。我想为搜索到的文本设置 css 属性 (background-color:yellow;)。
最佳答案
您正在尝试使用 $(bodyTxt) 通过其内部文本选择 html 元素。您想找到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");
你的整个代码看起来像这样
$(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，它会匹配大小写。如果你想找到适合输入的任何东西，无论是小写还是大写，你都必须使用 toLowerCase
在这里工作 jsFiddle
关于javascript - 突出显示文本的搜索栏，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/58899666/