filter-list/filter-list.html at master · rlkissinger/filter-list · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <link
      rel="stylesheet"
      href="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0/css/materialize.min.css"
    />
    <title>My Contacts</title>
  </head>
  <body>
    <div class="container">
      <h1 class="center-align">My Contacts</h1>
      <input id="filter-input" placeholder="Search names" type="text" />
      <ul id="names" class="collection width-header">
        <li class="collection-header">
          <h5>A</h5>
        </li>
        <li class="collection-item">
          <a href="#">Abe</a>
        </li>
        <li class="collection-item">
          <a href="#">Adam</a>
        </li>
        <li class="collection-item">
          <a href="#">Alan</a>
        </li>
        <li class="collection-item">
          <a href="#">Anna</a>
        </li>
        <li class="collection-header">
          <h5>B</h5>
        </li>
        <li class="collection-item">
          <a href="#">Beth</a>
        </li>
        <li class="collection-item">
          <a href="#">Bill</a>
        </li>
        <li class="collection-item">
          <a href="#">Bob</a>
        </li>
        <li class="collection-item">
          <a href="#">Brad</a>
        </li>
        <li class="collection-header">
          <h5>C</h5>
        </li>
        <li class="collection-item">
          <a href="#">Carrie</a>
        </li>
        <li class="collection-item">
          <a href="#">Cathy</a>
        </li>
        <li class="collection-item">
          <a href="#">Courtney</a>
        </li>
      </ul>
    </div>
    <script>
      // Grab text input for searching
      let filterInput = document.getElementById("filter-input");
      // On keyup, filter the list of names
      filterInput.addEventListener("keyup", filterNames);
      function filterNames() {
        // Grab the text value inside the search input and transform it to upper case for consistency
        let filterValue = document
          .getElementById("filter-input")
          .value.toUpperCase();
        // Grab the unordered list
        let ul = document.getElementById("names");
        // Grab all of the elements that contain contact names
        let li = ul.querySelectorAll("li.collection-item");
        // We need to iterate over each of the collection item elements
        for (let i = 0; i < li.length; i++) {
          // Grab the list item at the current indexs a tag and get the value of the html collection
          let a = li[i].getElementsByTagName("a")[0];
          // If the text contains the filter value, persist it
          if (a.innerHTML.toUpperCase().indexOf(filterValue) > -1) {
            li[i].style.display = "";
            // If not, we want to make it disappear
          } else {
            li[i].style.display = "none";
          }
        }
      }
    </script>
  </body>
</html>