HTML Combobox 主要用于在 HTML 中构建表单。用户可以根据自己的喜好从列表中选择一个选项。它由 select 元素和 input type=”text” 元素组成。组合框的功能与选择标签相同。它在
Combobox是可以轻松支持各种浏览器的HTML元素。它作为最新形式的对象作为组合框，用于通过给定文本字段中的选项填充数据。
我们知道，Combobox 是
此语法的代码如下：
<input type=text list=value> <datalist> <option>content</option> <option>content</option> <option>content</option> <option>content</option> <option>content</option> </datalist>
此语法的代码如下：
<input type="text" id="demo" name="comboboxdemo"/> <select name=" optionlist " onChange="combo(this, 'demo')"> <option>option 1</option> <option>option 2</option> <option>option 3</option> <option> option 4 </option> <option> option 5 </option> </select>
Javascript
var example = listdemo ld.selectedIndex; var demo = optionlist.options[example].innerHTML; var demo = optionlist.options[example] .value;
以下是 html 中的组合框示例：
代码：
<html>
<head>
<title>Example of Combobox</title>
</head>
<style>
.combo{
padding:10px;
}
</style>
<h1>Front End Development languages</h1>
<body>
<select class="combo">
<option value="Select">Select....</option>
<option value="html">HTML 5</option>
<option value="css">CSS 3</option>
<option value="javascript">Javascript/Ajax</option>
<option value="bootstrap">Bootstrap</option>
<option value="react">React JS</option>
<option value="vue">Vue JS</option>
<option value="2">Angular 2</option>
<option value="4">Angular 4</option>
<option value="5">Angular 5</option>
<option value="6">Angular 6</option>
<option value="7">Angular 7</option>
<option value="8">Angular 8</option>
<option value="CSS fw">CSS framework</option>
<option value="rw">Responsive Web Design</option>
<option value="dom">DOM scripting</option>
<option value="preprocessors">Saas, Less</option>
<option value="api">HTML 5 API</option></select>
</body>
</html>输出：
代码：
<!DOCTYPE html>
<html>
<body>
<h2>Combobox as a form element</h2>
<p>As we all know combobox is the combination of the Select tag and Form element. Here we are going to create same thing in which we are creating combolist in which user can select option as per their choice and this option will redirect to the that particular option so It can be able to open new form using this option .</p>
<form action="C:\Users\Sonali\Desktop\HTML files\Dropdownlist.html">
<input list="html_elements" name="web_language">
<datalist id="html_elements">
<option value="Anchor_tag"> </option>
<option value="Aside _tag"> </option>
<option value="dragdrop"> </option>
<option value="Dropdownlist"> </option>
<option value="Font_tag"></option>
<option value="Block_elements"> </option>
<option value="Blockquote"> </option>
<option value="Colsapn"> </option>
<option value="inline_style"> </option>
<option value="Kbd"></option>
<option value="Meta_tags"> </option>
<option value="Quotation"> </option>
<option value="Table_background"> </option>
<option value="Table_border"> </option>
<option value="Caption"> </option>
<option value="Select tag"> </option>
</datalist>
<input type="submit">
</form>
</body>
</html>
<!--HTML Form Code -->
<!DOCTYPE html>
<html>
<head>
<style>
.dropdownbtn {
background-color: lightgreen;
color: white;
padding: 12px;
font-size: 12px;
}
.dropdowndemo{
position:fixed;
display: block;
}
.dropdownlist-content {
display: none;
position: absolute;
background-color: deepskyblue;
min-width: 120px;
z-index: 1;
}
.dropdownlist-content a {
color:black;
padding: 14px 18px;
display: block;
}
.dropdownlist-content a:hover {background-color: lightcyan;}
.dropdowndemo:hover .dropdownlist-content {display: block;}
.dropdowndemo:hover .dropdownbtn {background-color: palevioletred;}
</style>
</head>
<body>
<div class="dropdowndemo">
<button class="dropdownbtn">HTML forms Element</button>
<div class="dropdownlist-content">
<a href="#">Anchor_tag</a>
<a href="#">Aside _tag</a>
<a href="#">dragdropdown</a>
<a href="#">Font_tag</a>
<a href="#">Block_elements</a>
<a href="#">Blockquote</a>
<a href="#">Colsapn</a>
<a href="#">inline_style</a>
<a href="#">Kbd</a>
<a href="#">Meta_tags</a>
<a href="#">Quotation</a>
<a href="#">Table_background</a>
<a href="#">Table_border</a>
<a href="#">Caption</a>
<a href="#">Select tag</a>
</div>
</div>
</body>
</html>输出：
从列表中选择一个选项后，它将链接到附加的表格或网页。单击提交值后，将显示带有元素的表单，如下所示：
代码：
<!—Main page-->
<!DOCTYPE html>
<html>
<body>
<h2>Student Details</h2>
<form action="C:\Users\Sonali\Desktop\HTML files\combodemo.html">
<input list="stud" name="demo">
<datalist id="stud">
<option value="Student Details"> </option>
<option value="Registration"> </option>
</datalist>
<input type="submit">
</form>
</body>
</html>
<!—Registration form code-->
<html>
<head>
<title>Student Details</title>
<style>
h3{
text-align: center;
}
table{
color:white;
background-color:chocolate;
border-collapse: collapse;
border: 2px solid black;
}
table.inner{
border: 0px
}
</style>
</head>
<body>
<h3>STUDENT REGISTRATION FORM</h3>
<form>
<table align="center" cellpadding = "6">
<tr>
<td>FIRST NAME</td>
<td><input type="text" name="First_Name"/>
</td>
</tr>
<tr>
<td>LAST NAME</td>
<td><input type="text" name="Last_Name"/>
</td>
</tr>
<tr>
<td>DATE OF BIRTH</td>
<td><input type="date" name="Birth_date" /></td>
</tr>
<tr>
<td>EMAIL ID</td>
<td><input type="text" name="Email_Id" maxlength="100" /></td>
</tr>
<tr>
<td>MOBILE NUMBER</td>
<td>
<input type="text" name="Mobile_Number" maxlength="10" />
</td>
</tr>
<tr>
<td>GENDER</td>
<td>
Male <input type="radio" name="Gender" value="Male" />
Female <input type="radio" name="Gender" value="Female" />
Transgender <input type="radio" name="Gender" value="Transgender" />
</td>
</tr>
<tr>
<td>CITY</td>
<td><input type="text" name="City" maxlength="20" />
</td>
</tr>
<tr>
<td>PINCODE</td>
<td><input type="text" name="pincode" />
</td>
</tr>
<tr>
<td>STATE</td>
<td><input type="text" name="State" />
</td>
</tr>
<tr>
<td>COUNTRY</td>
<td><input type="text" name="Country" value="India" readonly="readonly" /></td>
</tr>
<tr>
<td>HOBBIES <br /><br /><br /></td>
<td>
Writing
<input type="checkbox" name="Hobby_1" value="Writing" />
Sketching
<input type="checkbox" name="Hobby_2" value="Designing" />
Designing
<input type="checkbox" name="Hobby_3" value="Cooking" />
<br />
Others
<input type="checkbox" name="Hobby_4" value="Other">
<input type="text" name="Other_Hobby" maxlength="30" />
</td>
</tr>
<tr>
<td>Percentage</td>
<td><input type="text" name="percentage"/ maxlength="2" placeholder="marks in %"></td>
</tr>
<tr>
<td colspan="2" align="center">
<input type="submit" value="Submit">
<input type="reset" value="Reset">
</td>
</tr>
</table>
</form>
</body>
</html>输出：
HTML 组合框是网页设计中创建选择列表最重要的元素之一。最新的浏览器最常使用它。它由
以上是HTML 中的组合框的详细内容。更多信息请关注PHP中文网其他相关文章！
