javascript - DOM traversing for a searched keyword is not showing as expected? -

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i trying implement filtering mechanism using javascript in ui traverse through dom , find searched word. how html , ui looks like. enter image description here

so idea once data(which dynamic) loaded back-end(through java) want traverse dom in html particular keyword searched. how writing js in jquery

$(document).ready(function() {      jquery('#txtsearch').keyup(function(event){         if (event.keycode == 27) {             resetsearch();         }          if (jquery('#txtsearch').val().length > 0) {             jquery('.list-group-item').hide();             jquery('.list-group-item span.assignee-style:contains(\'' + jquery('#txtsearch').val() + '\')').             parent('li').parent('ul').parent('li').show();          }          if (jquery('#txtsearch').val().length == 0) {             resetsearch();         }      });            function resetsearch(){         jquery('#txtsearch').val('');         jquery('.list-group-item').show();         jquery('#txtsearch').focus();     }    });

the behavior expecting when search "john" want data(in 3 columns) contains "john" appear. start traversing dom assignee name only. results not wanted. doing wrong?

.parent takes selector, not tag name, why not simplify to:

$(document).ready(function() {      jquery('#txtsearch').keyup(function(event){         var search = jquery('#txtsearch').val();         if (event.keycode == 27) {             resetsearch();         }          if (search.length > 0) {             jquery('.list-group-item').hide();             jquery('.list-group-item span.assignee-style:contains(\'' + search + '\')').                 parent('.list-group-item').show();         }         else {             resetsearch();         }      });            function resetsearch(){         jquery('#txtsearch').val('');         jquery('.list-group-item').show();         jquery('#txtsearch').focus();     } });

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