jQuery Mobile Selectmenu preventFocusZoom选项

jQuery Mobile是一种基于网络的技术，用于制作可在所有智能手机、平板电脑和台式机上访问的响应式内容。

在这篇文章中，我们将使用jQuery Mobile Selectmenu preventFocusZoom选项。这个选项是当一个自定义的选择被聚焦时，暂时禁用页面缩放，这可以防止iOS设备将页面放大到选择中。默认情况下，iOS经常会放大表单控件，而且这种行为在移动优化的布局中往往是不必要的，而且会造成干扰。

语法:

用preventFocusZoom选项初始化选择菜单。

$( ".selector" ).selectmenu({
preventFocusZoom: true
});

设置preventFocusZoom选项。

$( ".selector" ).selectmenu("option", 
    "preventFocusZoom", true);

获得preventFocusZoom选项。

var shadow = $( ".selector" )
    .selectmenu( "option", "preventFocusZoom" );

CDN链接：首先，添加你的项目需要的jQuery Mobile脚本。

<link rel=”stylesheet” href=”//code.jquery.com/mobile/1.5.0-alpha.1/jquery.mobile-1.5.0-alpha.1.min.css”>
<script src=”//code.jquery.com/jquery-3.2.1.min.js”></script>
<script src=”//code.jquery.com/mobile/1.5.0-alpha.1/jquery.mobile-1.5.0-alpha.1.min.js”></script>

例子：这个例子描述了jQuery Mobile Selectmenu preventFocusZoom选项。

<!doctype html>
<html lang="en">
  
<head>
    <meta charset="utf-8">
    <meta name="viewport"
          content="width=device-width, initial-scale=1">
    <link rel="stylesheet" 
          href=
"//code.jquery.com/mobile/1.5.0-alpha.1/jquery.mobile-1.5.0-alpha.1.min.css">
    <script src=
"//code.jquery.com/jquery-3.2.1.min.js">
    </script>
    <script src=
"//code.jquery.com/mobile/1.5.0-alpha.1/jquery.mobile-1.5.0-alpha.1.min.js">
    </script>
</head>
  
<body>
    <center>
        <div data-role="page">
            <h1 style="color:green;">
                GeeksforGeeks
            </h1>
            <h3>jQuery Mobile Selectmenu preventFocusZoom Option</h3>
            <div role="main" class="ui-content">
                <label for="GFG" class="select">
                    GeeksforGeeks Courses:
                </label>
                <select name="GFG" id="GFG" 
                        data-native-menu="false">
                    <option value="C">
                      C Programming
                    </option>
                    <option value="CPP">
                      C++ Programming
                    </option>
                    <option value="JAVA">
                      Java Programming
                    </option>
                    <option value="overnight">
                      Python Programming
                    </option>
                    <option value="WEB">
                      Web Development
                    </option>
                </select>
            </div>
            <input type="button" id="Button" 
                   value="Value of the preventFocusZoom option">
            <div id="log"></div>
        </div>
    </center>
    <script>
         $(document).ready(function () {$ ("#GFG").selectmenu({
                preventFocusZoom: true
            });
             $("#GFG").selectmenu("option", "preventFocusZoom", true);$ ("#Button").on('click', function () {
                var a =  $("#GFG").selectmenu("option", "preventFocusZoom");$ ('#log').html(a);
            });
        });
    </script>
</body>
  
</html>

输出:

jQuery Mobile Selectmenu preventFocusZoom选项