ホームページ >ウェブフロントエンド >jsチュートリアル >jquery は、form_jquery に入力するときにテキストを上にスライドさせるプロンプトの効果を実装します。
この記事の例では、フォームに入力するときにテキストを上にスライドさせるプロンプトの効果を jquery がどのように実装するかを説明します。皆さんの参考に共有してください。詳細は以下の通りです。
これは、jQuery に基づいて実装されたフォーム入力ボックスのプロンプト効果です。入力が行われていない場合、テキスト ボックスをクリックしてテキストを入力すると、プロンプト テキストが入力ボックスからスライドして表示されます。入力ボックスは非常に奇妙に見えますが、性格も非常に優れており、ユーザー エクスペリエンスは比較的良好で、CSS3 の一部の属性が使用されているため、テストする場合は、IE9 の上位バージョンまたは Chrome などの Web ブラウザを使用してください。そしてFirefox。
実行中のエフェクトのスクリーンショットは次のとおりです:
具体的なコードは次のとおりです:
<!doctype html> <html> <head> <meta charset="utf-8"> <title>jQuery人性化表单标签提示</title> <script type="text/javascript" src="jquery-1.6.2.min.js"></script> <script type="text/javascript"> !function($){ var defaults = { position: "top", animationTime: 500, easing: "ease-in-out", offset: 20, hidePlaceholderOnFocus: true }; $.fn.animateLabel = function(settings, btn) { var position = btn.data("position") || settings.position, posx = 0, posy = 0; $(this).css({ "left": "auto", "right": "auto", "position": "absolute", "-webkit-transition": "all " + settings.animationTime + "ms " + settings.easing, "-moz-transition": "all " + settings.animationTime + "ms " + settings.easing, "-ms-transition": "all " + settings.animationTime + "ms " + settings.easing, "transition": "all " + settings.animationTime + "ms " + settings.easing }); switch (position) { case 'top': posx = 0; posy = ($(this).height() + settings.offset) * -1; $(this).css({ "top": "0", "opacity": "1", "-webkit-transform": "translate3d(" + posx + ", " + posy + "px, 0)", "-moz-transform": "translate3d(" + posx + ", " + posy + "px, 0)", "-ms-transform": "translate3d(" + posx + ", " + posy + "px, 0)", "transform": "translate3d(" + posx + ", " + posy + "px, 0)" }); break; case 'bottom': posx = 0; posy = ($(this).height() + settings.offset); $(this).css({ "bottom": "0", "opacity": "1", "-webkit-transform": "translate3d(" + posx + ", " + posy + "px, 0)", "-moz-transform": "translate3d(" + posx + ", " + posy + "px, 0)", "-ms-transform": "translate3d(" + posx + ", " + posy + "px, 0)", "transform": "translate3d(" + posx + ", " + posy + "px, 0)" }); break; case 'left': posx = ($(this).width() + settings.offset) * -1; posy = 0; $(this).css({ "left": 0, "top": 0, "opacity": "1", "-webkit-transform": "translate3d(" + posx + "px, " + posy + "px, 0)", "-moz-transform": "translate3d(" + posx + "px, " + posy + "px, 0)", "-ms-transform": "translate3d(" + posx + "px, " + posy + "px, 0)", "transform": "translate3d(" + posx + "px, " + posy + "px, 0)" }); break; case 'right': posx = $(this).width() + settings.offset; posy = 0; $(this).css({ "right": 0, "top": 0, "opacity": "1", "-webkit-transform": "translate3d(" + posx + "px, " + posy + "px, 0)", "-moz-transform": "translate3d(" + posx + "px, " + posy + "px, 0)", "-ms-transform": "translate3d(" + posx + "px, " + posy + "px, 0)", "transform": "translate3d(" + posx + "px, " + posy + "px, 0)" }); break; } } $.fn.removeAnimate = function(settings, btn) { var position = btn.data("position") || settings.position, posx = 0, posy = 0; $(this).css({ "top": "0", "opacity": "0", "-webkit-transform": "translate3d(" + posx + ", " + posy + "px, 0)", "-moz-transform": "translate3d(" + posx + ", " + posy + "px, 0)", "-ms-transform": "translate3d(" + posx + ", " + posy + "px, 0)", "transform": "translate3d(" + posx + ", " + posy + "px, 0)" }); } $.fn.label_better = function(options){ var settings = $.extend({}, defaults, options), el = $(this), triggerIn = "focus", triggerOut = "blur"; if(settings.easing == "bounce") settings.easing = "cubic-bezier(0.175, 0.885, 0.420, 1.310)" el.each(function( index, value ) { var btn = $(this), position = btn.data("position") || settings.position; btn.wrapAll("<div class='lb_wrap' style='position:relative; display: inline;'></div>") if( btn.val().length > 0) { var text = btn.data("new-placeholder") || btn.attr("placeholder"); $("<div class='lb_label " + position + "'>"+ text + "</div>").css("opacity", "0").insertAfter(btn).animateLabel(settings, btn); } btn.bind(triggerIn, function() { if(btn.val().length < 1) { var text = btn.data("new-placeholder") || btn.attr("placeholder"), position = btn.data("position") || settings.position; $("<div class='lb_label " + position + "'>"+ text + "</div>").css("opacity", "0").insertAfter(btn).animateLabel(settings, btn); } if (settings.hidePlaceholderOnFocus == true) { btn.data("default-placeholder", btn.attr("placeholder")) btn.attr("placeholder", "") } btn.parent().find(".lb_label").addClass("active"); }).bind(triggerOut, function() { if(btn.val().length < 1) { btn.parent().find(".lb_label").bind("transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd", function(){ $(this).remove(); }).removeAnimate(settings, btn) } if (settings.hidePlaceholderOnFocus == true) { btn.attr("placeholder", btn.data("default-placeholder")) btn.data("default-placeholder", "") } btn.parent().find(".lb_label").removeClass("active"); }); }); } }(window.jQuery); </script> <style> html { height: 100%; } body { background: #272D30; padding: 0; text-align: center; font-family: 'open sans'; position: relative; margin: 0; height: 100%; } .wrapper { height: auto !important; height: 100%; margin: 0 auto; overflow: hidden; } a { text-decoration: none; } h1, h2 { width: 100%; float: left; } h1 { margin-top: 100px; color: #fff; text-shadow: 0 1px 5px rgba(0,0,0,0.5); margin-bottom: 5px; font-size: 70px; letter-spacing: -4px; } h2 { color: #5F7591; font-weight: bold; text-shadow: 0 1px 5px rgba(0,0,0,0.5); margin-top: 0; margin-bottom: 10px; } .pointer { color: #9b59b6; font-family: 'Pacifico', cursive; font-size: 30px; margin-top: 15px; } pre { margin: 80px auto; } pre code { padding: 35px; border-radius: 5px; font-size: 15px; background: rgba(0,0,0,0.1); border: rgba(0,0,0,0.05) 5px solid; max-width: 500px; } .main { float: left; width: 100%; margin: 0 auto; } .main h1 { padding:20px 50px; float: left; width: 100%; font-size: 60px; box-sizing: border-box; -webkit-box-sizing: border-box; -moz-box-sizing: border-box; font-weight: 100; margin: 0; padding-top: 25px; font-family: 'Pacifico'; letter-spacing: 2px; } .main h1.demo1 { background: #1ABC9C; } .reload.bell { font-size: 12px; padding: 20px; width: 45px; text-align: center; height: 47px; border-radius: 50px; -webkit-border-radius: 50px; -moz-border-radius: 50px; } .reload.bell #notification { font-size: 25px; line-height: 140%; } .reload, .btn{ display: inline-block; border: 4px solid #A2261E; border-radius: 5px; -moz-border-radius: 5px; -webkit-border-radius: 5px; background: #CC3126; display: inline-block; line-height: 100%; padding: 0.7em; text-decoration: none; color: #fff; width: 100px; line-height: 140%; font-size: 17px; font-family: open sans; font-weight: bold; } .reload:hover{ background: #A2261E; } .btn { width: 200px; color: #fff; border: none; margin-left: 10px; background: rgba(255, 255, 255, 0.11); } .clear { width: auto; } .btn:hover, .btn:hover { background: rgba(255,255,255,0.3); } .btns { width: 410px; margin: 50px auto; } .credit { font-style: italic; text-align: center; color: #fff; padding: 10px; margin: 0 0 40px 0; float: left; width: 100%; } .credit a { color: #ccc; text-decoration: none; font-weight: bold; } .back { position: absolute; top: 0; left: 0; text-align: center; display: block; padding: 7px; width: 100%; box-sizing: border-box; -moz-box-sizing: border-box; -webkit-box-sizing: border-box; background: rgba(0, 0, 0, 0.65); font-weight: bold; font-size: 13px; color: #fff; -webkit-transition: all 200ms ease-out; -moz-transition: all 200ms ease-out; -o-transition: all 200ms ease-out; transition: all 200ms ease-out; } .back:hover { background: rgba(0, 0, 0, 0.85); } .bl_form { margin: 150px 0; } .bl_form input { padding-top: 15px; background: rgba(255,255,255,0.10); box-shadow: 0 2px 8px rgba(0,0,0,0.2); border: none; color: white; padding: 10px 15px; border-radius: 25px; font-size: 16px; outline: none; } .lb_wrap .lb_label.top, .lb_wrap .lb_label.bottom { left: 15px !important; } .lb_wrap .lb_label.left { left: 0; } .lb_label { font-weight: bold; color: #999; } .lb_label.active { color: #FFF; } </style> <script> $(document).ready( function() { $(".label_better").label_better({ easing: "bounce" }); }); </script> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head> <body> <div class="wrapper"> <div class="main"> <div class="header"> <h1>jQuery Label Better</h1> <h2>Label your form input like a boss</h2> <p class="credit">Created by Pete R., Founder of BucketListly</p> <div class="btns"> </div> </div> <div class="page-container"> <form class="bl_form"> <input type="text" class="label_better" data-new-placeholder="Username" placeholder="Username" > <input type="email" class="label_better" data-new-placeholder="Email Address" placeholder="Email Address"> <input type="password" value="abcdefg" class="label_better" data-new-placeholder="Password" placeholder="Password"> <input type="password" value="abcdefg" class="label_better" data-new-placeholder="Shhh.." placeholder="Confirm Password"> </form> </div> </div> </div> <div style="text-align:center;clear:both"> </div> </body> </html>
この記事が皆さんの jquery プログラミング設計に役立つことを願っています。