html+javascript+bootstrap realizes the functions of hierarchical multi selection box full layer all selection and multi selection

  • 2021-08-03 08:14:59
  • OfStack

If you want to do a function that is sorted by hierarchy and can be selected multiple times, you tend to use multi-layer tags first, and directly select and add them to the text field. Find this article, which is very detailed. If you need to do the functions mentioned above, you can refer to this address, http://mrthink.net/jquery-plugin-iselecttags/

However, considering that if the number of options to be made is uncertain, it may be very large, and it is easy to get visual fatigue when using tags. At the same time, it is required to minimize the impact on the layout and effect of web pages with the change of the number of options, so we choose to use hierarchical multi-selection boxes, which is the common effect of setting computers. The Layer 2 option can collapse/expand below Layer 1, using bootstrap's data-toggle="collapse" data-target="#demo1" Performs an associated layer 2 collapse effect.

The specific code is as follows:


<script>
// When the first 1 Layer option is selected, the 2 All layers are selected 
  function allSelect(check_v, checkname) {
    var v_item = document.getElementsByName(check_v);
    var items = document.getElementsByName(checkname);
    for (var i = 0; i < items.length; ++i) {
      if (v_item[0].checked) {
        items[i].checked = true;
      }
      else {
        items[i].checked = false;
      }
    }
  }
// When the first 2 Layer options are all selected, the 1 Layers are selected; If the first 2 Layer options have at least 1 If the number is not selected, the number 1 Layer is not selected 
  function singleSelect2parent(check_v, checkname) {
    var v_item = document.getElementsByName(check_v);
    var items = document.getElementsByName(checkname);
    var childStatus = true;
    for (var i = 0; i < items.length; ++i) {
      childStatus = (childStatus && items[i].checked);
    }
    if (childStatus) {
      v_item[0].checked = true;
    }
    else {
      v_item[0].checked = false;
    }
  }
// Select All button, click Select All, and all options will be selected 
  function allChecked() {
    var inputItems = document.getElementsByClassName("checkbox2check");
    for (var i = 0; i < inputItems.length; i++) {
      var checkItems = document.getElementsByName("checkbox" + (i+1));
      for (var j = 0; j < checkItems.length; j++) {
        checkItems[j].checked = true;
      }
      inputItems[i].checked = true;
    }
  }
</script>
<style>
  ul li{
    list-style:none;
  }
</style>
<div>
  <input class="checkbox2check" type="checkbox" checked name="checkbox_v1" value="version1" onclick="allSelect('checkbox_v1', 'checkbox1')"><a data-toggle="collapse" data-target="#demo1"> Version 1<b class="caret"></b></a>
  <ul id="demo1" class="collapse in">
    <li> <input type="checkbox" checked name="checkbox1" value="layer1" onclick="singleSelect2parent('checkbox_v1', 'checkbox1')">v1.0.1</li>
    <li> <input type="checkbox" checked name="checkbox1" value="layer2" onclick="singleSelect2parent('checkbox_v1', 'checkbox1')">V1.1.1</li>
    <li> <input type="checkbox" checked name="checkbox1" value="layer3" onclick="singleSelect2parent('checkbox_v1', 'checkbox1')">V1.2.1</li>
    <li> <input type="checkbox" checked name="checkbox1" value="layer4" onclick="singleSelect2parent('checkbox_v1', 'checkbox1')">V1.3.1</li>
  </ul>
</div>
<div>
  <input class="checkbox2check" type="checkbox" checked name="checkbox_v2" value="version2" onclick="allSelect('checkbox_v2', 'checkbox2')"><a data-toggle="collapse" data-target="#demo2"> Version 2<b class="caret"></b></a>
  <ul id="demo2" class="collapse in">
    <li> <input type="checkbox" checked name="checkbox2" value="layer5" onclick="singleSelect2parent('checkbox_v2', 'checkbox2')">V2.0.1</li>
    <li> <input type="checkbox" checked name="checkbox2" value="layer6" onclick="singleSelect2parent('checkbox_v2', 'checkbox2')">V2.1.1</li>
    <li> <input type="checkbox" checked name="checkbox2" value="layer7" onclick="singleSelect2parent('checkbox_v2', 'checkbox2')">V2.2.1</li>
  </ul>
</div>
<div>
  <input class="checkbox2check" type="checkbox" checked name="checkbox_v3" value="version3" onclick="allSelect('checkbox_v3', 'checkbox3')"><a data-toggle="collapse" data-target="#demo3"> Version 3<b class="caret"></b></a>
  <ul id="demo3" class="collapse in">
    <li> <input type="checkbox" checked name="checkbox3" value="layer8" onclick="singleSelect2parent('checkbox_v3', 'checkbox3')">V3.0.1</li>
    <li> <input type="checkbox" checked name="checkbox3" value="layer9" onclick="singleSelect2parent('checkbox_v3', 'checkbox3')">V3.1.1</li>
    <li> <input type="checkbox" checked name="checkbox3" value="layer10" onclick="singleSelect2parent('checkbox_v3', 'checkbox3')">V3.2.1</li>
  </ul>
</div>
<button type="button" onclick="allChecked()"> All selection </button>

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