[英]Javascript search for string in selected elements and hide the html tag that contains that string
[英]Hide search elements in Javascript
在下面的示例代码中,我想隐藏搜索字段下显示的元素。 代码来自 W3: https ://www.w3schools.com/howto/howto_js_filter_lists.asp 搜索元素应仅在用户开始在搜索字段中输入时显示。 没有什么复杂的,只是为初学者寻找解决方案。 谢谢
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
* {
box-sizing: border-box;
}
#myInput {
background-image: url('/css/searchicon.png');
background-position: 10px 12px;
background-repeat: no-repeat;
width: 100%;
font-size: 16px;
padding: 12px 20px 12px 40px;
border: 1px solid #ddd;
margin-bottom: 12px;
}
#myUL {
list-style-type: none;
padding: 0;
margin: 0;
}
#myUL li a {
border: 1px solid #ddd;
margin-top: -1px; /* Prevent double borders */
background-color: #f6f6f6;
padding: 12px;
text-decoration: none;
font-size: 18px;
color: black;
display: block
}
#myUL li a:hover:not(.header) {
background-color: #eee;
}
</style>
</head>
<body>
<h2>My Phonebook</h2>
<input type="text" id="myInput" onkeyup="myFunction()" placeholder="Search for names.." title="Type in a name">
<ul id="myUL">
<li><a href="#">Adele</a></li>
<li><a href="#">Agnes</a></li>
<li><a href="#">Billy</a></li>
<li><a href="#">Bob</a></li>
<li><a href="#">Calvin</a></li>
<li><a href="#">Christina</a></li>
<li><a href="#">Cindy</a></li>
</ul>
<script>
function myFunction() {
var input, filter, ul, li, a, i, txtValue;
input = document.getElementById("myInput");
filter = input.value.toUpperCase();
ul = document.getElementById("myUL");
li = ul.getElementsByTagName("li");
for (i = 0; i < li.length; i++) {
a = li[i].getElementsByTagName("a")[0];
txtValue = a.textContent || a.innerText;
if (txtValue.toUpperCase().indexOf(filter) > -1) {
li[i].style.display = "";
} else {
li[i].style.display = "none";
}
}
}
</script>
</body>
</html>
只需将display: none
设置为#myUL li
#myUL li {
display: none;
}
并更改您的js
添加li[i].style.display = "block"
if (txtValue.toUpperCase().indexOf(filter) > -1) {
li[i].style.display = "block";
} else {
li[i].style.display = "none";
}
工作示例
function myFunction() { var input, filter, ul, li, a, i, txtValue; input = document.getElementById("myInput"); filter = input.value.toUpperCase(); ul = document.getElementById("myUL"); li = ul.getElementsByTagName("li"); for (i = 0; i < li.length; i++) { a = li[i].getElementsByTagName("a")[0]; txtValue = a.textContent || a.innerText; if (txtValue.toUpperCase().indexOf(filter) > -1) { li[i].style.display = "block"; } else { li[i].style.display = "none"; } } }
* { box-sizing: border-box; } #myInput { background-image: url('/css/searchicon.png'); background-position: 10px 12px; background-repeat: no-repeat; width: 100%; font-size: 16px; padding: 12px 20px 12px 40px; border: 1px solid #ddd; margin-bottom: 12px; } #myUL { list-style-type: none; padding: 0; margin: 0; } #myUL li { display: none } #myUL li a { border: 1px solid #ddd; margin-top: -1px; /* Prevent double borders */ background-color: #f6f6f6; padding: 12px; text-decoration: none; font-size: 18px; color: black; display: block } #myUL li a:hover:not(.header) { background-color: #eee; }
<h2>My Phonebook</h2> <input type="text" id="myInput" onkeyup="myFunction()" placeholder="Search for names.." title="Type in a name"> <ul id="myUL"> <li><a href="#">Adele</a></li> <li><a href="#">Agnes</a></li> <li><a href="#">Billy</a></li> <li><a href="#">Bob</a></li> <li><a href="#">Calvin</a></li> <li><a href="#">Christina</a></li> <li><a href="#">Cindy</a></li> </ul>
我制作这个搜索栏的方法会有所不同
const input = document.querySelector("input"); const listItems = document.querySelectorAll(".list-item"); input.addEventListener("input", (event) => { const value = event.target.value; listItems.forEach((listItem) => { const target = value.trim().length > 0 && listItem.innerText.toLowerCase().includes(value); if (target === true) { listItem.style.display = "block"; } else { listItem.style.display = "none"; } }); });
@import "https://cdn.jsdelivr.net/gh/KunalTanwar/normalize/css/normalize.inter.min.css"; body { height: 100%; display: grid; place-items: center; } .container { --space: 4px; --border-color: #e1e1e1; width: 100%; display: flex; max-width: 480px; flex-direction: column; row-gap: calc(var(--space) * 2); } .container input { border: 0; padding: calc(var(--space) * 4); box-shadow: inset 0 0 0 1px var(--border-color); transition: box-shadow 125ms ease; } .container input:focus { --border-color: #2e86c1; } .container ul { display: inherit; row-gap: var(--space); flex-direction: inherit; } .container ul .list-item { display: none; text-transform: capitalize; padding: calc(var(--space) * 4); box-shadow: inset 0 0 0 1px var(--border-color); }
<div class="container"> <input type="text" placeholder="Search for names" /> <ul> <li class="list-item">adele</li> <li class="list-item">agnes</li> <li class="list-item">billy</li> <li class="list-item">bob</li> <li class="list-item">calvin</li> <li class="list-item">christina</li> <li class="list-item">cindy</li> </ul> </div>
现在在我的方法中,如果您的输入为空,则没有可见list-item
。
不是优雅的解决方案,但有助于您了解脚本的工作原理,从一开始就将 style="display:none" 添加到 li :
<ul id="myUL">
<li style="display:none"><a href="#">Adele</a></li>
<li style="display:none"><a href="#">Agnes</a></li>
<li style="display:none"><a href="#">Billy</a></li>
<li style="display:none"><a href="#">Bob</a></li>
<li style="display:none"><a href="#">Calvin</a></li>
<li style="display:none"><a href="#">Christina</a></li>
<li style="display:none"><a href="#">Cindy</a></li>
</ul>
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