由网友(彼年豆蔻き)分享简介：根据该（get使用JavaScript ）链接下光标一个字我可以根据鼠标pointer.it的细字的英语。我改变它（阿拉伯语语言）according this (get a word under cursor using JavaScript )link i can get word under mouse poi...

根据该（get使用JavaScript ）链接下光标一个字我可以根据鼠标pointer.it的细字的英语。 我改变它（阿拉伯语语言）

according this (get a word under cursor using JavaScript )link i can get word under mouse pointer.it's fine for english language. i change it (for arabic language)

<p>سلام به همه</p>
Word: <span id="word"></span>

<script type="text/javascript">
    $(function() {
        // wrap words in spans
        $('p').each(function() {
            var $this = $(this);
            $this.html($this.text().replace(/[^x00-x80]+/g, "<span>$1</span>"));
        });

        // bind to each span
        $('p span').hover(
            function() { $('#word').text($(this).css('background-color','#ffff66').text()); },
            function() { $('#word').text(''); $(this).css('background-color',''); }
        );
    });

但它返回$ 1的每一个字。 请大家帮忙！

but it return '$1' for each word. please help!

推荐答案

您的需要的出现在原来的普通恩pression括号。在常规EX pression符号，括号形式代入了 $ 1 ，在替换字符串匹配组。

You need the parentheses that appear in the original regular expression. In regular expression notation, parentheses form a "match group" which is substituted in for the "$1" in the replace string.

$this.html($this.text().replace(/([^x00-x80]+)/g, "<span>$1</span>"));

没有在你的正则表达式匹配任何团体， $ 1 被简单地视为文字美元符号和一个。

Without any match groups in your regex, the $1 is simply treated as a literal dollar sign and one.

当你有多个括号的匹配组，用于组以取代美元符号，表示编号的占位符的匹配组打开的顺序（第一个匹配组替换 $ 1 ，第二替换 $ 2 等）。

When you have multiple parenthesized match groups, the groups are used in to replace dollar-sign-denoted numbered placeholders in the order that the match groups are opened (the first match group replaces $1, the second replaces $2, etc).