找到div中的行数

Question

我想显示'查看全部'类型的链接,只有当div中的行已达到4行时.

HTML

<div>
    3PAS-Pub-IO-doubleclick.net-LI, ATOM_DFP_Pub_LI, AUG12_Zynga.com_MafiaWars2_0.10$_CPM,
    ATOM_Macro_Jivox Testing,   Sep 11 Head and Shoulder Innovation - Do Not Bill, 123Greetings - IN Do Not Pay_Second, 
    July 11_Affinity.com_Fiat Linea_CPL 55, 3PAS-Pub-IO-atdmt.com-LI, 2_Affinity_RealEstate_CPC_2.8_INR_2nd,
    AUG12_Zynga.com_treasureIsle_0.10$_CPM, AUG12_Zynga.com_theville_0.10$_CPM, 123Greetings - IN Do Not Pay_NonIndia,
    AUG12_Zynga.com_RubyBlast_0.10$_CPM, 12_Affinity_Education_CPC_2.8_INR_1st, 728x90_Original, 300x250_TagModified,
    Dec11_ WhyteFort_CPL_INR 45, AUG12_Zynga.com_PetsVille_0.10$_CPM, 123Greetings - IN Do Not Pay_First,
    AUG12_Zynga.com_FishVille_0.10$_CPM, 3PAS-Pub-IO-adfac.net-LI,
    3PAS-Pub-IO-bs.serving-sys.com-LI1, 3PAS-test-pub-IO-li, 160x600_Noscr...
</div>

试过jquery子串概念,但没有运气,

我尝试过

1. 找到div高度

2. 找到行高

3. div高度/行高=行数

这是代码:

var divheight = $("#startegy-sections-targeting-exclude").height();
var lineheight = $("#startegy-sections-targeting-exclude").css('line-height');
console.log(Math.round(divheight/parseInt(lineheight))); 

但没有成功,你们能帮助我吗？

Answer 1

代码的问题在于,如果未指定行高,则line-height默认值为normal.

$(function() {
  var divheight = $("#startegy-sections-targeting-exclude").height();
  var lineheight = parseInt($("#startegy-sections-targeting-exclude").css('line-height'), 10);
  console.log("Number of lines:", Math.round(divheight / lineheight));
});

#startegy-sections-targeting-exclude {
  line-height: 20px;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="startegy-sections-targeting-exclude">
  3PAS-Pub-IO-doubleclick.net-LI, ATOM_DFP_Pub_LI, AUG12_Zynga.com_MafiaWars2_0.10$_CPM, ATOM_Macro_Jivox Testing, Sep 11 Head and Shoulder Innovation - Do Not Bill, 123Greetings - IN Do Not Pay_Second, July 11_Affinity.com_Fiat Linea_CPL 55, 3PAS-Pub-IO-atdmt.com-LI,
  2_Affinity_RealEstate_CPC_2.8_INR_2nd, AUG12_Zynga.com_treasureIsle_0.10$_CPM, AUG12_Zynga.com_theville_0.10$_CPM, 123Greetings - IN Do Not Pay_NonIndia, AUG12_Zynga.com_RubyBlast_0.10$_CPM, 12_Affinity_Education_CPC_2.8_INR_1st, 728x90_Original, 300x250_TagModified,
  Dec11_ WhyteFort_CPL_INR 45, AUG12_Zynga.com_PetsVille_0.10$_CPM, 123Greetings - IN Do Not Pay_First, AUG12_Zynga.com_FishVille_0.10$_CPM, 3PAS-Pub-IO-adfac.net-LI, 3PAS-Pub-IO-bs.serving-sys.com-LI1, 3PAS-test-pub-IO-li, 160x600_Noscr...
</div>

Answer 2

您可以使用 jQuery 的 ThreeDots 插件：http://tpgblog.com/2009/12/21/thirddots-the-jquery-ellipsis-plugin/

当呼叫ThreeDots()您时<div>，设置max_rows为4。只需查看该页面上的示例，您还可以设置自定义的“了解更多”链接。但请注意，您必须将文本包装到 extra 中<span>，如下所示：

<div class="text_here">
    <span class="ellipsis_text">
        your text
    </span>
</div>

...jQuery 代码行将是：

$('.text_here').ThreeDots({ max_rows:4 });