使用watermark.js这样的插件在
Jquery数据表的搜索字段中添加灰色提示文本不是一个选项,我必须自定义编写它.我几乎在那里,但面对下面的代码片段中解释的这个小而奇怪的问题.
function toggleHintText()
{
// alert("The hint text should show up");
var textSuggest = "Please input search parameter";
var searchField = $('input:text');
searchField .attr("value",textSuggest );
searchField .addClass("activeHint");
searchField .focus(function() {
if(searchField .attr("value") == textSuggest)
{
searchField .attr("value","");
}
});
searchField .keyup(function() {
if(searchField .attr("value") == "")
{
searchField .addClass("activeHint");
}
else
{
searchField .removeClass("activeHint");
}
});
searchField .blur(function() {
if(searchField .attr("value") == "")
{
searchField .attr("value",hinttext);
searchField .addClass("activeHint");
}
});
}
此方法称为onload,如下所示
$(document).ready(function() {
populateTableData();
toggleHintText();
} );
================================================== =========================================
我面临的问题是,如果没有方法开头的警报,提示文本就不会显示在搜索框中.警报是否有利于document.ready的工作？从document.ready调用两个方法会搞乱toggleHint方法吗？我的一个要求是保留用户输入搜索文本,如果他在搜索查询后点击表格行然后点击自定义后退按钮,这就是我必须从document.ready调用它的原因.
请提前通知并表示感谢.
解决方法
尝试使用.queue(),. delay(),. keyup()
$(document).ready(function() {
var data = $("#example");
data.DataTable();
$("input[type=search]")
.on("keyup",{
// if input,delay until no input for 1.2 seconds
"delay": 1200
},function(e) {
var elem = $(this);
var update = function update() {
// wait 1.2 seconds to update `val` with "hint"
if ($.Now() - e.timeStamp > e.data.delay
&& e.target.value.length > 0 && !/^\s/.test(e.target.value)) {
var val = e.target.value.toLowerCase();
// filter `.DataTable().data()`
// return items where first index matches `val`
var res = $.grep(data.DataTable().data(),function(value,key) {
return val === value[0].slice(0,val.length).toLowerCase()
|| new RegExp(val,"i").test(value[0])
})
// sort returned data
.sort()
// filter returned data `res` for match to `val`
.filter(function(hint) {
return hint[0].toLowerCase().slice(0,val.length) === val
|| new RegExp(val,"i").test(hint)
})[0];
elem.val(res[0])
.css({
"color": "grey","fontStyle": "italic"
});
} else {
return elem.queue("update",update)
}
};
var defer = function defer(next) {
// if input before 1.2 seconds,// empty `"update"` queue,delay calling
// update until no input for 1.2 seconds
elem.queue("update",[])
elem.delay(e.data.delay,"update")
.queue("update").push(update);
return next()
};
// if input,do stuff
if (e.target.value.length > 0) {
elem
.queue("update",defer)
.dequeue("update")
} else {
elem
.queue("update",[])
}
}).keyup()
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"> </script> <link href="https://cdn.datatables.net/1.10.7/css/jquery.dataTables.css" rel="stylesheet" /> <script src="https://cdn.datatables.net/1.10.7/js/jquery.dataTables.min.js"></script> <table id="example" class="display" cellspacing="0" width="100%"> <thead> <tr> <th>Name</th> <th>Position</th> <th>Office</th> <th>Age</th> <th>Start date</th> <th>Salary</th> </tr> </thead> <tfoot> <tr> <th>Name</th> <th>Position</th> <th>Office</th> <th>Age</th> <th>Start date</th> <th>Salary</th> </tr> </tfoot> <tbody> <tr> <td>Tiger Nixon</td> <td>System Architect</td> <td>Edinburgh</td> <td>61</td> <td>2011/04/25</td> <td>$320,800</td> </tr> <tr> <td>Garrett Winters</td> <td>Accountant</td> <td>Tokyo</td> <td>63</td> <td>2011/07/25</td> <td>$170,750</td> </tr> <tr> <td>Ashton Cox</td> <td>Junior Technical Author</td> <td>San Francisco</td> <td>66</td> <td>2009/01/12</td> <td>$86,000</td> </tr> <tr> <td>Cedric Kelly</td> <td>Senior Javascript Developer</td> <td>Edinburgh</td> <td>22</td> <td>2012/03/29</td> <td>$433,060</td> </tr> <tr> <td>Airi Satou</td> <td>Accountant</td> <td>Tokyo</td> <td>33</td> <td>2008/11/28</td> <td>$162,700</td> </tr> <tr> <td>Brielle Williamson</td> <td>Integration Specialist</td> <td>New York</td> <td>61</td> <td>2012/12/02</td> <td>$372,000</td> </tr> <tr> <td>Herrod Chandler</td> <td>Sales Assistant</td> <td>San Francisco</td> <td>59</td> <td>2012/08/06</td> <td>$137,500</td> </tr> <tr> <td>Rhona Davidson</td> <td>Integration Specialist</td> <td>Tokyo</td> <td>55</td> <td>2010/10/14</td> <td>$327,900</td> </tr> <tr> <td>Colleen Hurst</td> <td>Javascript Developer</td> <td>San Francisco</td> <td>39</td> <td>2009/09/15</td> <td>$205,500</td> </tr> <tr> <td>Sonya Frost</td> <td>Software Engineer</td> <td>Edinburgh</td> <td>23</td> <td>2008/12/13</td> <td>$103,600</td> </tr> <tr> <td>Jena Gaines</td> <td>Office Manager</td> <td>London</td> <td>30</td> <td>2008/12/19</td> <td>$90,560</td> </tr> <tr> <td>Quinn Flynn</td> <td>Support Lead</td> <td>Edinburgh</td> <td>22</td> <td>2013/03/03</td> <td>$342,000</td> </tr> <tr> <td>Charde Marshall</td> <td>Regional Director</td> <td>San Francisco</td> <td>36</td> <td>2008/10/16</td> <td>$470,600</td> </tr> <tr> <td>Haley Kennedy</td> <td>Senior Marketing Designer</td> <td>London</td> <td>43</td> <td>2012/12/18</td> <td>$313,500</td> </tr> <tr> <td>Tatyana Fitzpatrick</td> <td>Regional Director</td> <td>London</td> <td>19</td> <td>2010/03/17</td> <td>$385,750</td> </tr> <tr> <td>Michael Silva</td> <td>Marketing Designer</td> <td>London</td> <td>66</td> <td>2012/11/27</td> <td>$198,500</td> </tr> <tr> <td>Paul Byrd</td> <td>Chief Financial Officer (CFO)</td> <td>New York</td> <td>64</td> <td>2010/06/09</td> <td>$725,000</td> </tr> <tr> <td>Gloria Little</td> <td>Systems Administrator</td> <td>New York</td> <td>59</td> <td>2009/04/10</td> <td>$237,500</td> </tr> <tr> <td>Bradley Greer</td> <td>Software Engineer</td> <td>London</td> <td>41</td> <td>2012/10/13</td> <td>$132,000</td> </tr> <tr> <td>Dai Rios</td> <td>Personnel Lead</td> <td>Edinburgh</td> <td>35</td> <td>2012/09/26</td> <td>$217,500</td> </tr> <tr> <td>Jenette Caldwell</td> <td>Development Lead</td> <td>New York</td> <td>30</td> <td>2011/09/03</td> <td>$345,000</td> </tr> <tr> <td>Yuri Berry</td> <td>Chief Marketing Officer (CMO)</td> <td>New York</td> <td>40</td> <td>2009/06/25</td> <td>$675,000</td> </tr> <tr> <td>Caesar Vance</td> <td>Pre-Sales Support</td> <td>New York</td> <td>21</td> <td>2011/12/12</td> <td>$106,450</td> </tr> <tr> <td>Doris Wilder</td> <td>Sales Assistant</td> <td>Sidney</td> <td>23</td> <td>2010/09/20</td> <td>$85,600</td> </tr> <tr> <td>Angelica Ramos</td> <td>Chief Executive Officer (CEO)</td> <td>London</td> <td>47</td> <td>2009/10/09</td> <td>$1,200,000</td> </tr> <tr> <td>Gavin Joyce</td> <td>Developer</td> <td>Edinburgh</td> <td>42</td> <td>2010/12/22</td> <td>$92,575</td> </tr> <tr> <td>Jennifer Chang</td> <td>Regional Director</td> <td>Singapore</td> <td>28</td> <td>2010/11/14</td> <td>$357,650</td> </tr> <tr> <td>Brenden Wagner</td> <td>Software Engineer</td> <td>San Francisco</td> <td>28</td> <td>2011/06/07</td> <td>$206,850</td> </tr> <tr> <td>Fiona Green</td> <td>Chief Operating Officer (COO)</td> <td>San Francisco</td> <td>48</td> <td>2010/03/11</td> <td>$850,000</td> </tr> <tr> <td>Shou Itou</td> <td>Regional Marketing</td> <td>Tokyo</td> <td>20</td> <td>2011/08/14</td> <td>$163,000</td> </tr> <tr> <td>Michelle House</td> <td>Integration Specialist</td> <td>Sidney</td> <td>37</td> <td>2011/06/02</td> <td>$95,400</td> </tr> <tr> <td>Suki Burks</td> <td>Developer</td> <td>London</td> <td>53</td> <td>2009/10/22</td> <td>$114,500</td> </tr> <tr> <td>Prescott Bartlett</td> <td>Technical Author</td> <td>London</td> <td>27</td> <td>2011/05/07</td> <td>$145,000</td> </tr> <tr> <td>Gavin Cortez</td> <td>Team leader</td> <td>San Francisco</td> <td>22</td> <td>2008/10/26</td> <td>$235,500</td> </tr> <tr> <td>martena Mccray</td> <td>Post-Sales support</td> <td>Edinburgh</td> <td>46</td> <td>2011/03/09</td> <td>$324,050</td> </tr> <tr> <td>Unity Butler</td> <td>Marketing Designer</td> <td>San Francisco</td> <td>47</td> <td>2009/12/09</td> <td>$85,675</td> </tr> <tr> <td>Howard Hatfield</td> <td>Office Manager</td> <td>San Francisco</td> <td>51</td> <td>2008/12/16</td> <td>$164,500</td> </tr> <tr> <td>Hope Fuentes</td> <td>Secretary</td> <td>San Francisco</td> <td>41</td> <td>2010/02/12</td> <td>$109,850</td> </tr> <tr> <td>Vivian Harrell</td> <td>Financial Controller</td> <td>San Francisco</td> <td>62</td> <td>2009/02/14</td> <td>$452,500</td> </tr> <tr> <td>Timothy Mooney</td> <td>Office Manager</td> <td>London</td> <td>37</td> <td>2008/12/11</td> <td>$136,200</td> </tr> <tr> <td>Jackson Bradshaw</td> <td>Director</td> <td>New York</td> <td>65</td> <td>2008/09/26</td> <td>$645,750</td> </tr> <tr> <td>Olivia Liang</td> <td>Support Engineer</td> <td>Singapore</td> <td>64</td> <td>2011/02/03</td> <td>$234,500</td> </tr> <tr> <td>Bruno Nash</td> <td>Software Engineer</td> <td>London</td> <td>38</td> <td>2011/05/03</td> <td>$163,500</td> </tr> <tr> <td>Sakura Yamamoto</td> <td>Support Engineer</td> <td>Tokyo</td> <td>37</td> <td>2009/08/19</td> <td>$139,575</td> </tr> <tr> <td>Thor Walton</td> <td>Developer</td> <td>New York</td> <td>61</td> <td>2013/08/11</td> <td>$98,540</td> </tr> <tr> <td>Finn Camacho</td> <td>Support Engineer</td> <td>San Francisco</td> <td>47</td> <td>2009/07/07</td> <td>$87,500</td> </tr> <tr> <td>Serge Baldwin</td> <td>Data Coordinator</td> <td>Singapore</td> <td>64</td> <td>2012/04/09</td> <td>$138,575</td> </tr> <tr> <td>Zenaida Frank</td> <td>Software Engineer</td> <td>New York</td> <td>63</td> <td>2010/01/04</td> <td>$125,250</td> </tr> <tr> <td>Zorita Serrano</td> <td>Software Engineer</td> <td>San Francisco</td> <td>56</td> <td>2012/06/01</td> <td>$115,000</td> </tr> <tr> <td>Jennifer Acosta</td> <td>Junior Javascript Developer</td> <td>Edinburgh</td> <td>43</td> <td>2013/02/01</td> <td>$75,650</td> </tr> <tr> <td>Cara Stevens</td> <td>Sales Assistant</td> <td>New York</td> <td>46</td> <td>2011/12/06</td> <td>$145,600</td> </tr> <tr> <td>Hermione Butler</td> <td>Regional Director</td> <td>London</td> <td>47</td> <td>2011/03/21</td> <td>$356,250</td> </tr> <tr> <td>Lael Greer</td> <td>Systems Administrator</td> <td>London</td> <td>21</td> <td>2009/02/27</td> <td>$103,500</td> </tr> <tr> <td>Jonas Alexander</td> <td>Developer</td> <td>San Francisco</td> <td>30</td> <td>2010/07/14</td> <td>$86,500</td> </tr> <tr> <td>Shad Decker</td> <td>Regional Director</td> <td>Edinburgh</td> <td>51</td> <td>2008/11/13</td> <td>$183,000</td> </tr> <tr> <td>Michael Bruce</td> <td>Javascript Developer</td> <td>Singapore</td> <td>29</td> <td>2011/06/27</td> <td>$183,000</td> </tr> <tr> <td>Donna Snider</td> <td>Customer Support</td> <td>New York</td> <td>27</td> <td>2011/01/25</td> <td>$112,000</td> </tr> </tbody> </table>
