jQuery高亮顯示文本中重要的關鍵字
一、界面預覽
鼠標放到右邊的Tab按鈕上,文字透明度降低,同時一段文字高亮顯示,效果如下:
Demo地址:http://5thirtyone.com/sandbox/samples/fadefocus/
很絢麗的效果幺!
二、實現原理
將要高亮顯示的文字加上段落標記, class=”mask”的div 做為遮罩層,使此遮罩層位于文字內容之上(z-index屬性,使用Jquery給段落動態添加樣式類。
三、HTML代碼
<div class="wrapper"> <ul class="entity-results"> <li><a class="d1" href="#">Summarya>li> <li><a class="d2" href="#">Avatara>li> <li><a class="d3" href="#">Formatsa>li> ul> <div class="content"> <h2> Avatar (2009 film)h2> <div class="entity-source"> <img src="images/avatar.jpg" alt="Avatar poster" /> <p> Avatar, also known as James Cameron's Avatar, is an American 3-D science fiction epic film written and directed by <a href="http://en.wikipedia.org/wiki/James_Cameron"> James Camerona>, and was released on December 16, 2009 by 20th Century Fox. The film is co-produced by <a href="http://en.wikipedia.org/wiki/Lightstorm_Entertainment"> Lightstorm Entertainmenta>, and <span class="d1">focuses on an epic conflict on Pandoraspan>, an inhabited Earth-sized moon of Polyphemus, one of three fictional gas giants orbiting <a href="http://en.wikipedia.org/wiki/Alpha_Centauri_A">Alpha Centauri Aa>. On Pandora, human colonists and the sentient humanoid indigenous inhabitants of Pandora, the Na'vi, engage in a war over the planet's resources and the latter's continued existence. The film's title refers to <span class="d2">an avatar, a representation of a real person in a virtual worldspan>.p> <p> <span class="d3">The film was released in 2D and 3D formatsspan>, along with an IMAX 3D release in selected theaters. The film is being touted as a breakthrough in terms of filmmaking technology, for its development of 3D viewing and stereoscopic filmmaking with cameras that were specially designed for the film's production.p> <p> Read the rest of the <a href="http://en.wikipedia.org/wiki/Avatar_(2009_film)">original Wikipedia page about Avatara>p> <div class="mask"> div> div> div> div> |
entity-results類中顯示了Tab按鈕,每個按鈕控制左邊文字的透明度,段落文字的高亮顯示。
entity-source類中有三個段落span Calss分別為 d1 d2 d3,也就是高亮文字段落。
class=”mask”的空div放到最后,此Div也就是一個遮罩層。
四、CSS關鍵代碼
.entity-source, .entity-source span.show { position: relative; } .entity-source .mask { display: none; position: absolute; top: 0; left: 0; height: 100%; width: 100%; z-index: 1; } .entity-source span { z-index: 2; } .entity-source span.show { background: #ffc; color: #000; }
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類mask中的z-index:1 使得
z-nidex:2又使得span段落覆蓋在
五、Jquery代碼
jQuery(document).ready(function($) { // mask source 控制mask的動畫效果 var maskSource = jQuery('.mask'); jQuery('.entity-results').hover(function() { maskSource.animate({opacity:0.7},1).fadeIn('750'); }, function() { maskSource.fadeOut('1000'); });
// match hover 控制段落的高亮顯示 var sample1 = jQuery('span.d1'); var sample2 = jQuery('span.d2'); var sample3 = jQuery('span.d3'); jQuery('a.d1').hover(function() { sample1.addClass('show'); //給段落添加類 }, function() { sample1.removeClass('show'); //移除段落類 }); jQuery('a.d2').hover(function() { sample2.addClass('show'); }, function() { sample2.removeClass('show'); }); jQuery('a.d3').hover(function() { sample3.addClass('show'); }, function() { sample3.removeClass('show'); }); }); |
動畫函數animate(params, [duration], [easing], [callback])
Params:一組包含作為動畫屬性和終值的樣式屬性和及其值的集合
duration (可選):種預定速度之一的字符串("slow", "normal", or "fast")或表示動畫時長的毫秒數值(如:1000)
easing (可選):要使用的擦除效果的名稱(需要插件支持).默認jQuery提供"linear" 和 "swing".
callback (可選):在動畫完成時執行的函數
淡入效果函數:fadeIn(speed, [callback])
Speed:三種預定速度之一的字符串("slow", "normal", or "fast")或表示動畫時長的毫秒數值(如:1000)
callback (可選):(Optional) 在動畫完成時執行的函數
淡出效果函數:fadeOut解釋同fadeIn
英文地址:http://5thirtyone.com/archives/2206
Demo地址:http://5thirtyone.com/sandbox/samples/fadefocus/
Demo下載:http://5thirtyone.com/sandbox/samples/fadefocus/all.zip