jquery - 如何在用户单击链接后突出显示列表项

Question

我目前正在设置一个 IRC 记录器，当用户单击聊天日志中行的日期链接时，我在尝试突出显示聊天日志行时遇到了一些困难。整个代码在 php/html/css/jquery 中并连接到 mysql 数据库。

但是，我的问题是，当 jquery 代码将所选行移动到页面顶部时，我不太确定如何突出显示在页面上单击的链接行。

下面的代码在这里实时运行:http://openkore.info/irc-log/#msg2862

请注意，当您转到锚定列表时，它会突出显示消息行，而不是当用户单击同一页面上的其他链接而 jquery 移动消息时。

// content *******************************************
echo '<div id="container-wrap">';
echo '<div id="container">';
echo '<div id="content">';
echo '<ol id="log">';
if($sql) while($row = mysql_fetch_array($res, MYSQL_ASSOC)){
    echo '<li id="msg'.$row['id'].'" class="'.$row['type'].'">';
    echo '<div class="anchor" id="msg'.$row['id'].'"><a href="#msg'.$row['id'].'" class="time" title="'.$row['d'].'">';
    // give screenreaders a hint early enough which line includes a real message
    if($row['type'] == 'public') echo '<span class="a11y">message at </span>';
    echo '<time datetime="'.$row['d'].'T'.$row['t'].'">'.$row['t'].'</time>';
    echo '</a></div>';
    echo '<dl>';
    if($row['type'] == 'public'){
        echo '<dt style="color:#'.substr(md5($row['user']),0,6).'" class="user">'.htmlspecialchars($row['user']).'</dt>';
    }else{
        echo '<dt class="server">'.$row['type'].'</dt>';
    }
    $msg = htmlspecialchars(  $row['msg']);
    $msg = preg_replace_callback('/((https?|ftp):\/\/[\w-?&;#~=\.\/\@%:]+[\w\/])/ui',
                                 'format_link',$msg);

    echo '<dd>';
    if(substr($msg,0,3) == '/me'){
        $msg = '<strong>'.htmlspecialchars($row['user']).substr($msg,3).'</strong>';
    }
    echo $msg;
    echo '</dd>';
    echo '</dl>';
    echo '</li>';

}
echo '</ol>';

echo '</div>';


<!-- JQuery Plugin -->
<script type="text/javascript" src="js/jquery.min.js"></script>

<!-- JQuery Scrolling to Selected Line Plugin -->
<script>
$(document).ready(function() {

    // Click event for any anchor tag that's href starts with #
    $('a[href^="#"]').click(function(event) {

        // The id of the section we want to go to.
        var id = $(this).attr("href");

        // An offset to push the content down from the top.
        var offset = 75;

        // Our scroll target : the top position of the
        // section that has the id referenced by our href.
        var target = $(id).offset().top - offset;

        // The magic...smooth scrollin' goodness.
        $('html, body').animate({scrollTop:target}, 500);

        //prevent the page from jumping down to our section.
        event.preventDefault();
    });
});
</script>

这是它附带的 CSS:

@media screen {

/* basic styles
********************************************************************/

html {
    overflow-x: auto;
    overflow-y: scroll;
    margin: 0;
}
html,
body {
    background: url(bg.png) repeat;
    color: #333;
    padding: 0;
}
body {
    margin: 1em 2em;
    font: normal 100%/1.4 Frutiger, Calibri, "Myriad Pro", Myriad, "Nimbus Sans L", Geneva, "Helvetica Neue", Helvetica, Arial, sans-serif; /* §fsize §font */
    -webkit-text-size-adjust: 100%;
}

#header-wrap {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    border-style:solid;
    border-width:1px;
    z-index:333;
}

#header-container {
    height: 70px;
    background-color:#282828;
    opacity: 1.0;
}

#header {
    width: 940px;
    margin: 0 auto;
    position: relative;
}

#container-wrap {
    left: -20;
    width: 100%;
    z-index: 1;
}

#container {
    width: 940px;
    margin: 0 auto;
    overflow: auto;
    padding: 70px 0 40px;
}

#content {
    float: left;
    width: 625px;
}

#sidebar {
    position: fixed;
    width: 275px;
    float: right; 
    margin-left: 650px;
}

#footer-wrap {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;    
    border-style:solid;
    border-width:1px;
    z-index: 1;
}

#footer-container {
    height: 20px;
    background-color:#282828;
    opacity: 1.0;
}

#footer-content {
    color: #FFAC1C;
    width: 940px;
    margin: 0 auto;
    position: relative;
    top:-10px;
}

a.footer {
    background-color:282828;
}
a.footer:link,
a.footer:visited {
    text-decoration: none;
}
a.footer:link {
    color: #FFAC1C;
}
a.footer:visited {
    color: #FFAC1C;
}
a.footer:link:hover,
a.footer:visited:hover,
a.footer:link:focus,
a.footer:visited:focus,
a.footer:link:active,
a.footer:visited:active {
    background-color:#282828;
    text-decoration: underline;
    outline: none;
}
a.footer:link:active,
a.footer:visited:active {
    color: #FFAC1C;
}

a.nav:hover,
a.nav:visited:active,
a.nav:link:hover{
    text-decoration: underline;
    outline: none;
    background-color:#B2FF99;
}

a.nav:link:active{
    background-color:red;
}

/*
.anchor{
  display: block;
  height: 70px; <!--same height as header-->
  margin-top: -70px; <!--same height as header-->
  visibility: hidden;
}
*/

/*____________ headings ____________*/

h1,
h2,
h3 {
    font: helvetica;
    font-weight: bold;
    line-height: 1.2;
    color: #E4E4E4;
    background-color: inherit;
    padding: 0;
    clear: both;
}

h1 {
    font-size: 2.25em;
    margin: 0;
}
h2 {
    font-size: 1.5em;
    margin: 0 0 0.666em;
    color: #000;
}
h2.subtitle {
    font-size: 1.1em;
    margin: 0 0 0.666em;
    color: #FFAC1C;
}
h3 {
    font-size: 1.125em;
    margin: 0 0 0.888em;
    color: #000;
}


/*____________ basic margins and paddings ____________*/

p,
ul,
ol {
    margin: 0 0 1.4em 0; /* bottom margin = line-height */
    padding: 0;
}

div,
dl {
    margin: 0;
    padding: 0;
}


/*____________ lists ____________*/

li,
dd,
dt {
    padding: 0;
    margin: 0;
    list-style: none;
}
dt {
    font-weight: bold;
}

li li {
    font-size: 100%;
}


/*____________ links ____________*/

a {
    background-color: inherit;
}
a:link,
a:visited {
    text-decoration: none;
}
a:link {
    color: #000;
}
a:visited {
    color: #333;
}
a:link:hover,
a:visited:hover,
a:link:focus,
a:visited:focus,
a:link:active,
a:visited:active {
    text-decoration: underline;
    outline: none;
}
a:link:active,
a:visited:active {
    color: #000;
}


/*____________ forms ____________*/

form {
    display: inline;
    margin: 0;
    padding: 0;
}
label {
    vertical-align: middle;
    cursor: pointer;
}
input {
    font: inherit;
    color: inherit;
    line-height: normal;
    margin: 0;
    vertical-align: middle;
    padding: .1em;
}
input::-moz-focus-inner {
    border: 0;
    padding: 0;
}


/*____________ misc ____________*/

abbr {
    cursor: help;
    border-bottom: 1px dotted;
    font-style: normal;
}

/* hide something in an accessible way */
.a11y {
    position: absolute;
    left: -99999px;
    top: -99999px;
    font-size: 0;
    overflow: hidden;
    display: inline;
}


/* irclogger-specific styles
********************************************************************/

a.skip {
    position: absolute;
    top: 0;
    right: 2em;
}

footer {
#    border-top: 1px solid #ccc;
    text-align: right;
    padding: .7em 2em .1em;
    margin: 0 -2em;
    display: block;
}


/*____________ navigation below ____________*/

ul {
    overflow: hidden;
}
ul li {
    float: left;
}

ul.archive {
    margin-bottom: .9em;
}

ul.archive li a {
    display: inline-block;
    padding: .3em .5em;
    border: 1px solid #ccc;
    margin: 0 .4em .7em 0;
    border-radius: 3px;
}

ul.archive li.today {
    clear: left;
}

p.hint {
    margin: -.7em 0 .7em;
}

ul.filters li {
    margin-right: 1.5em;
}

ul.filters label,
ul.filters input,
ul.filters small {
    display: block;
}


/*____________ the log ____________*/

#log {
    margin: 0 -2em 1.4em;
#    border: solid #ccc;
    border-width: 1px 0;
    padding: 1em 2em;
}

#log li {
    opacity: .5;
}
#log li.public {
    opacity: 1;
}
#log a.time {
    color: #333;
}


} /* /@media */

/*____________ for screen and print ____________*/

#log li {
    clear: left;
    padding-left: 11em;
}

#log a.time {
    float: left;
    margin-left: -11em;
}

#log dt {
    font-weight: normal;
    margin-left: -6em;
    float: left;
    width: 6em;
    overflow: hidden;
    text-overflow: ellipsis;
}

#log dd {
    padding-left: .2em;
}

#log .public dt {
    font-weight: bold;
}

/* highlight targeted line */
li:target {
    background-color: #ff9;
}

/*____________ for smaller screens ____________*/

@media only screen and (max-width: 50em) {

body {
    margin: 1em .5em .2em;
}

a.skip {
    right: .5em;
}

#log {
    margin-left: -.5em;
    margin-right: -.5em;
    border: solid #ccc;
    border-width: 1px 0;
    padding-left: .5em;
    padding-right: .5em;
}

#log li {
    padding-left: 0;
}
#log a.time {
    min-width: 4.5em;
    margin-left: 0;
}
#log dt {
    margin-left: 0;
    width: auto;
    float: none;
}
#log dd {
    margin: -.2em 0 .2em 4.5em;
    padding-left: 0;
}


footer {
    margin-left: -.5em;
    margin-right: -.5em;
    padding-left: .5em;
    padding-right: .5em;
}


h1 {
    font-size: 1.5em;
}
h2 {
    font-size: 1.125em;
    margin: 0 0 0.888em;
}
h3 {
    font-size: 1em;
    margin: 0 0 1.0em;
}


} /* /@media */


/*____________ print ____________*/

@media print {

a.skip,
.a11y,
#nav {
    display: none;
}

footer {
#    border-top: 1px solid;
}

#log {
    list-style: none;
    margin-left: 0;
    padding-left: 0;
}

#log li {
    display: none;
    margin-left: 0;
}
#log li.public {
    display: block;
}

#log a.time {
    color: inherit;
    text-decoration: none;
}


} /* /@media */

Answer 1

考虑给每个评论一个唯一的 ID，例如 <div id="message1001">...</div>

然后，使用散列标签 <a href="#message1001">...</a> 使您的链接指向正确的 ID

然后您可以设置一个简单的 css 规则来设置任何链接到使用伪选择器 :target 的样式。

a:target {
    //style code
}

div 在页面上的移动位置无关紧要。

希望对您有所帮助。