Filter search for <ul>

Question

I have a list of users as well:

<ul>
<li class="thumb selectable arrow light" style="margin-bottom:-5px;"
data-image="http://cdn.tapquo.com/lungo/icon-144.png">
<strong class="name">Peter <font data-count="0" style="position:relative;top:-2px;"> </font></strong> 
<small class="description">Hi!</small> 
</li>
...
</ul>

what I want is a text input each time you write a letter to display only users that start with that letter or that they might have the name. As I can do? It is with jquery but not as ...

Answer 1

Here is a input that filters a <ul> based on the value in pure JavaScript. It works by handling the onkeyup and then getting the <li>s and comparing their inner element .name with the filter text.

jsFiddle

var input = document.getElementById('input');
input.onkeyup = function () {
    var filter = input.value.toUpperCase();
    var lis = document.getElementsByTagName('li');
    for (var i = 0; i < lis.length; i++) {
        var name = lis[i].getElementsByClassName('name')[0].innerHTML;
        if (name.toUpperCase().indexOf(filter) == 0) 
            lis[i].style.display = 'list-item';
        else
            lis[i].style.display = 'none';
    }
}

Answer 2

So you have a collection of list items inside an unordered list like this.

<div class="some-input-field-class">
   <input type="text" name="filter" id="filter">
   <label for="filter">Filter Names</label>
</div>

<ul class="my-user-collection">
  <li class="thumb selectable arrow light" style="margin-bottom:-5px;"
  data-image="http://cdn.tapquo.com/lungo/icon-144.png">
  <strong class="name">Peter <font data-count="0" style="position:relative;top:-2px;"> </font></strong> 
  <small class="description">Hi!</small> 
  </li>
  ...
</ul>

You can add this in your javascript file. But you will need to load the event listener too. You probably have a few events so just do what you need to do. Maybe add it to another function where you load the rest of your event listeners.

// Load the event listener
document.querySelector('#filter').addEventListener('keyup', filterNames);

Function to iterate through the li by targeting the class, iterate through the array since we use querySelectorAll and NOT getElementByID. -1 means no match.

function filterNames(e) {
  const text = e.target.value.toLowerCase();
  document.querySelectorAll('.selectable').forEach(
    function(name) {
      let item = name.firstChild.textContent;
      if (item.toLowerCase().indexOf(text) != -1) {
        name.style.display = 'block';
      } else {
        name.style.display = 'none';
      }
    }
  );
}