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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”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;

}

 

 

mask中的z-index:1 使得mask> 覆蓋在左邊文字內容之上。

it知識庫jQuery高亮顯示文本中重要的關鍵字,轉載需保留來源!

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