在 <div> 中搜索文本

Question

我试图在单个 HTML5 页面上搜索每个页面，如果没有匹配项则隐藏。我 'almost' 但还不够。到目前为止，如果有单个字符的匹配项，我的将消失，但如果我键入其他任何内容，则会重新出现。另外，如果我清除搜索框，我希望页面重置。如果你们 Java 可以看看，我们将不胜感激。

function myFunction() {
    input = document.getElementById("Search");
    filter = input.value.toUpperCase();
    for (i=0; i<document.getElementsByClassName('target').length; i++){
if(document.getElementsByClassName('target'[i].innerHTML.toUpperCase().indexOf(filter) > -1) {     
    document.getElementsByClassName("target")[i].style.display = "none";
            }
        else{
         document.getElementsByClassName("target")[i].style.display = "";
        } 
    }
}
    </script>

    <table align="center" width="20%">
    <tr>
      <td style="padding-right: 10px">
        <input type="text" id="Search" onkeyup="myFunction()" 
        placeholder="Please enter a search term.." title="Type in a name">
      </td>
    </tr>
    </table>
    <br>


    <div class="target">
    This is my DIV element.
    </div>
    <div class="target">
    This is another Div element.
    </div>

Answer 1

给你。使用了符合您需要的 includes 方法。

function myFunction() {
  var input = document.getElementById("Search");
  var filter = input.value.toLowerCase();
  var nodes = document.getElementsByClassName('target');

  for (i = 0; i < nodes.length; i++) {
    if (nodes[i].innerText.toLowerCase().includes(filter)) {
      nodes[i].style.display = "block";
    } else {
      nodes[i].style.display = "none";
    }
  }
}

<table align="center" width="20%">
  <tr>
    <td style="padding-right: 10px">
      <input type="text" id="Search" onkeyup="myFunction()" placeholder="Please enter a search term.." title="Type in a name">
    </td>
  </tr>
</table>
<br>


<div class="target">
  This is my DIV element.
</div>
<div class="target">
  This is another Div element.
</div>
<div class="target">
  Can you find me?
</div>

Answer 2

您可以将 toggle 与搜索字符串结合使用，效果很好。

$("#Search").on("keyup", function () {
  val = $(this).val().toLowerCase();
  $("div").each(function () {
    $(this).toggle($(this).text().toLowerCase().includes(val));
  });
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table align="center" width="20%">
<tr>
  <td style="padding-right: 10px">
    <input type="text" id="Search"
    placeholder="Please enter a search term.." title="Type in a name">
  </td>
</tr>
</table>
<br>


<div class="target">
This is my DIV element.
</div>
<div class="target">
This is another Div element.
</div>

Answer 3

    Using JQuery: https://jquery.com

                function myFunction() {
                input = document.getElementById("Search"); 
            filter = input.value.toUpperCase();
        //Show all div class target
                $("div.target").show();
        //All div class target that not contains filter will be hidden
                $('div.target').each(function(index, elem){
       if($(elem).text().toUpperCase().includes(filter)) { //Not hidden 
 } else { $(elem).hide(); } 
                });
            }

Answer 4

您的代码运行良好！。

if(document.getElementsByClassName('target')<--you forgot to close paranthesis

并反转你的 if..else ,

你的 if..else 应该是这样的

if(document.getElementsByClassName('target')[i].innerHTML.toUpperCase().indexOf(filter) > -1) {     
    document.getElementsByClassName("target")[i].style.display = "block";
            }
        else{
            document.getElementsByClassName("target")[i].style.display = "none";
        } 
    }

function myFunction() {
    input = document.getElementById("Search");
    filter = input.value.toUpperCase();
    var length = document.getElementsByClassName('target').length;

    for (i=0; i<length; i++){
if(document.getElementsByClassName('target')[i].innerHTML.toUpperCase().indexOf(filter) > -1) {     
    document.getElementsByClassName("target")[i].style.display = "block";
            }
        else{
         document.getElementsByClassName("target")[i].style.display = "none";
        } 
    }
}

<table align="center" width="20%">
    <tr>
      <td style="padding-right: 10px">
        <input type="text" id="Search" onkeyup="myFunction()" 
        placeholder="Please enter a search term.." title="Type in a name">
      </td>
    </tr>
    </table>
    <br>


    <div class="target">
    This is my DIV element.
    </div>
    <div class="target">
    This is another Div element.
    </div>

Answer 5

添加到 Oen44 的答案 - 如果您想在任何搜索到的元素中都找不到查询时添加“未找到结果”消息，此方法有效：

JavaScript:

function searchFunction() {
  var input = document.getElementById("Search");
  var filter = input.value.toLowerCase();
  var nodes = document.getElementsByClassName('target');
  var itemsDisplayed = 0;
  document.getElementById('no_results').display = "none";

  for (i = 0; i < nodes.length; i++) {
    if (nodes[i].innerText.toLowerCase().includes(filter)) {
      nodes[i].style.display = "block";
      itemsDisplayed += 1;
    } else {
      nodes[i].style.display = "none";
    }
  }
  if (itemsDisplayed === 0){
      document.getElementById('no_results').display = "block";
  }
}

HTML:

      <table align="center" width="20%">
        <tr>
          <td style="padding-right: 10px">
            <input type="text" id="Search" onkeyup="myFunction()" 
            placeholder="Please enter a search term.." title="Type in a name">
          </td>
        </tr>
      </table>
        <br>
    
        <div class="target">
        This is my DIV element.
        </div>
        <div class="target">
        This is another Div element.
        </div>
        <div class="target">
        Can you find me?
        </div>
        <div id="no_results" style="display:none;">
        No results found
        </div>

在 <div> 中搜索文本

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