Get Element ID

 

This question already has an answer here:

  • How can I get the ID of an element using jQuery? 17 answers 
    • var id = $('li[data-id="KnSubject[StId]"]').attr('id');
console.log(id);

    使用attr函数。 

    var elem = $('li[data-id="KnSubject[StId]"]');
console.log(elem.attr('id'));
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<li role="treeitem" data-jstree="{&quot;icon&quot; : &quot;glyphicon glyphicon-pencil&quot;}" data-id="KnSubject[StId]" data-values="null" aria-selected="true" aria-level="3" aria-labelledby="j1_4_anchor" id="j1_4" class="jstree-node  jstree-leaf"><i class="jstree-icon jstree-ocl" role="presentation"></i><a class="jstree-anchor jstree-clicked" href="#" tabindex="-1" id="j1_4_anchor"><i class="jstree-icon jstree-themeicon glyphicon glyphicon-pencil jstree-themeicon-custom" role="presentation"></i>Type dossieritem (StId)</a></li>

    Just for completeness reasons: 

    $('li[data-id="KnSubject[StId]"]').get(0).id

    .get(0) retrieves the raw JS DOM Element.

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