最近、Web フロントエンド開発中に技術的な問題に遭遇しましたが、解決策が見つかりませんでした。Web クライアント側で「親」ドロップダウン リストを実装するにはどうすればよいですか?内部的にドロップダウン リストを作成し、サブドロップダウン メニューの値を上位ドロップダウン メニューに渡して出力します
1. 外部 のドロップダウン リストレイヤーは div などの他の要素を通じてシミュレートされます
2. より合理的なものになるように再設計します。この状況は、州の選択や都市の選択などの一般的な関連選択と同じように選択できます
上の階の友人に感謝します。私の経験は非常に限られているので、いくつかの例を提供したり、参考用のリンクを提供したりできるでしょうか。
よろしくお願いします！
現在の状況は次のとおりです:
(1) Firefox で異常に実行されます。
(2) 子のドロップダウンリストから取得した値を、前のドロップダウンリストに割り当てる方法がわかりません (つまり、CSS によってシミュレートされます)。 、div その親ドロップダウンリスト)
演習のソース コードは次のとおりです:
デモ.html
<!DOCTYPE html><html lang="en"> <head> <meta charset="UTF-8" /> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Custom Drop-Down List Styling</title> <link rel="stylesheet" type="text/css" href="style.css" /> <link href='http://fonts.googleapis.com/css?family=Lato:300,400,700' rel='stylesheet' type='text/css' /> <script type="text/javascript" src="modernizr.custom.79639.js"></script> <noscript><link rel="stylesheet" type="text/css" href="noJS.css" /></noscript> </head> <body> <div class="container"> <!-- Codrops top bar --> <div class="codrops-top"></div><!--/ Codrops top bar --> <header> <h1> </h1> <h2> </h2> <nav class="codrops-demos"></nav> </header> <section class="main"> <div class="wrapper-demo"> <div id="dd" class="wrapper-dropdown-1" tabindex="1"> <span>Select Contact</span> <ul class="dropdown" tabindex="1"> <li><a href="#"> <form> <select id="myselect"> <option value="1">Ed Bradley</option> <option value="2">Contact2</option> <option value="3">Contact3</option> </select> </form> </a> </li> <li><a href="#"> <form> <select id="myselect"> <option value="0">Select a Saved List</option> <option value="1">List1</option> <option value="2">List2</option> <option value="3">List3</option> </select> </form> </a> </li> <li><a href="#">Active Search - 200 Contacts</a></li> <li><a href="#">All Contacts - 70000 Contacts</a></li> </ul> </div> ?</div> </section> </div> <!-- jQuery if needed --> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script> <script type="text/javascript"> function DropDown(el) { this.dd = el; this.placeholder = this.dd.children('span'); this.opts = this.dd.find('ul.dropdown > li'); this.val = ''; this.index = -1; this.initEvents(); } DropDown.prototype = { initEvents : function() { var obj = this; obj.dd.on('click', function(event){ $(this).toggleClass('active'); return false; }); obj.opts.on('click',function(){ var opt = $(this); obj.val = opt.text(); obj.index = opt.index(); obj.placeholder.text('Select Contact: ' + obj.val); }); }, getValue : function() { return this.val; }, getIndex : function() { return this.index; } } $(function() { var dd = new DropDown( $('#dd') ); $(document).click(function() { // all dropdowns $('.wrapper-dropdown-1').removeClass('active'); }); }); </script> </body></html>
@import url('demo.css');@import url('font-awesome.css');/* GLOBALS */*,*:after,*:before { -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box; padding: 0; margin: 0;}::selection { background: transparent; }::-moz-selection { background: transparent; }.wrapper-demo { margin: 60px 0 0 0; *zoom: 1; font-weight: 400;}.wrapper-demo:after { clear: both; content: ""; display: table;}/* DEMO 1 */.wrapper-dropdown-1 { /* Size and position */ position: relative; /* Enable absolute positionning for children and pseudo elements */ width: 400px; padding: 10px; margin: 0 auto; /* Styles */ background: #9bc7de; color: #fff; outline: none; cursor: pointer; /* Font settings */ font-weight: bold;}.wrapper-dropdown-1:after { content: ""; width: 0; height: 0; position: absolute; right: 16px; top: 50%; margin-top: -6px; border-width: 6px 0 6px 6px; border-style: solid; border-color: transparent #fff; }.wrapper-dropdown-1 .dropdown { /* Size & position */ position: absolute; top: 100%; left: 0; right: 0; /* Styles */ background: #fff; list-style: none; font-weight: normal; /* Cancels previous font-weight: bold; */ /* Hiding */ opacity: 0; pointer-events: none;}.wrapper-dropdown-1 .dropdown li a { display: block; text-decoration: none; color: #9e9e9e; padding: 10px 20px;}/* Hover state */.wrapper-dropdown-1 .dropdown li:hover a { background: #f3f8f8;}/* Active state */.wrapper-dropdown-1.active .dropdown { opacity: 1; pointer-events: auto;}.wrapper-dropdown-1.active:after { border-color: #9bc7de transparent; border-width: 6px 6px 0 6px ; margin-top: -3px;}.wrapper-dropdown-1.active { background: #9bc7de; background: -moz-linear-gradient(left, #9bc7de 0%, #9bc7de 78%, #ffffff 78%, #ffffff 100%); background: -webkit-gradient(linear, left top, right top, color-stop(0%,#9bc7de), color-stop(78%,#9bc7de), color-stop(78%,#ffffff), color-stop(100%,#ffffff)); background: -webkit-linear-gradient(left, #9bc7de 0%,#9bc7de 78%,#ffffff 78%,#ffffff 100%); background: -o-linear-gradient(left, #9bc7de 0%,#9bc7de 78%,#ffffff 78%,#ffffff 100%); background: -ms-linear-gradient(left, #9bc7de 0%,#9bc7de 78%,#ffffff 78%,#ffffff 100%); background: linear-gradient(to right, #9bc7de 0%,#9bc7de 78%,#ffffff 78%,#ffffff 100%); filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#9bc7de', endColorstr='#ffffff',GradientType=1 );}/* No CSS3 support */.no-opacity .wrapper-dropdown-1 .dropdown,.no-pointerevents .wrapper-dropdown-1 .dropdown { display: none; opacity: 1; /* If opacity support but no pointer-events support */ pointer-events: auto; /* If pointer-events support but no pointer-events support */}.no-opacity .wrapper-dropdown-1.active .dropdown,.no-pointerevents .wrapper-dropdown-1.active .dropdown { display: block;}/* General Demo Style */body { font-family: 'Lato', 'Arial', sans-serif; background: #ddd url(../images/bg.jpg); font-weight: 300; font-size: 15px; color: #333; -webkit-font-smoothing: antialiased; overflow-y: scroll; overflow-x: hidden;}a { color: #555; text-decoration: none;}.container { width: 100%; position: relative;}.clr { clear: both; padding: 0; height: 0; margin: 0;}.main { width: 90%; margin: 0 auto; position: relative;}.container > header { margin: 10px; padding: 20px 10px 10px 10px; position: relative; display: block; text-shadow: 1px 1px 1px rgba(0,0,0,0.2); text-align: center;}.container > header h1 { font-size: 30px; line-height: 38px; margin: 0; position: relative; font-weight: 300; color: #666; text-shadow: 1px 1px 1px rgba(255,255,255,0.7);}.container > header h2 { font-size: 14px; font-weight: 300; margin: 0; padding: 15px 0 5px 0; color: #888; font-family: Cambria, Georgia, serif; font-style: italic; text-shadow: 1px 1px 1px rgba(255,255,255,0.9);}/* Header Style */.codrops-top { line-height: 24px; font-size: 11px; background: #fff; background: rgba(255, 255, 255, 0.5); text-transform: uppercase; z-index: 9999; position: relative; font-family: Cambria, Georgia, serif; box-shadow: 1px 0px 2px rgba(0,0,0,0.2);}/* Clearfix hack by Nicolas Gallagher: http://nicolasgallagher.com/micro-clearfix-hack/ */.codrops-top:before,.codrops-top:after { content: " "; /* 1 */ display: table; /* 2 */}.codrops-top:after { clear: both}.codrops-top a { padding: 0px 10px; letter-spacing: 1px; color: #333; display: inline-block;}.codrops-top a:hover { background: rgba(255,255,255,0.6);}.codrops-top span.right { float: right;}.codrops-top span.right a { float: left; display: block;}/* Demo Buttons Style */.codrops-demos { text-align:center; display: block; line-height: 30px; padding: 5px 0px;}.codrops-demos a { display: inline-block; margin: 0px 4px; padding: 0px 6px; color: #aaa; line-height: 20px; font-size: 12px; font-weight: 700; text-shadow: 1px 1px 1px #fff; border: 1px solid #fff; background: #ffffff; /* Old browsers */ background: -moz-linear-gradient(top, #ffffff 0%, #f6f6f6 47%, #ededed 100%); /* FF3.6+ */ background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#ffffff), color-stop(47%,#f6f6f6), color-stop(100%,#ededed)); /* Chrome,Safari4+ */ background: -webkit-linear-gradient(top, #ffffff 0%,#f6f6f6 47%,#ededed 100%); /* Chrome10+,Safari5.1+ */ background: -o-linear-gradient(top, #ffffff 0%,#f6f6f6 47%,#ededed 100%); /* Opera 11.10+ */ background: -ms-linear-gradient(top, #ffffff 0%,#f6f6f6 47%,#ededed 100%); /* IE10+ */ background: linear-gradient(top, #ffffff 0%,#f6f6f6 47%,#ededed 100%); /* W3C */ filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='#ededed',GradientType=0 ); /* IE6-9 */ box-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);}.codrops-demos a:hover { color: #333; background: #fff;}.codrops-demos a:active { background: #fff;}.codrops-demos a.current-demo,.codrops-demos a.current-demo:hover { background: #f0f0f0; border-color: #d9d9d9; color: #aaa; box-shadow: 0 1px 0 rgba(255,255,255,0.3); filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#f6f6f6', endColorstr='#f6f6f6',GradientType=0 ); /* IE6-9 */}.support-note span { color: #ac375d; font-size: 16px; display: none; font-weight: bold; text-align: center; padding: 5px 0;}.no-cssanimations .support-note span.no-cssanimations,.no-csstransforms .support-note span.no-csstransforms,.no-csstransforms3d .support-note span.no-csstransforms3d,.no-csstransitions .support-note span.no-csstransitions { display: block;}
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