JSFiddle - React, Tailwind, and code Playground

by Terry Mun

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<article class="alert-box" id="alert-box-news">
  <h1>News Alerts</h1>
  <p>text text text text text text text text text text text text text text</p>
  <a class="alert-box-close" id="close-alert-box-news">
    <img src="https://i.imgur.com/czf8yas.png" height="25" width="25" alt="">
  </a>
</article>

<article class="alert-box" id="alert-box-maintenance">
  <h1>Site Maintenance</h1>
  <p>text text text text text text text text text text text text text text</p>
  <a class="alert-box-close" id="close-alert-box-maintenance">
    <img src="https://i.imgur.com/czf8yas.png" height="25" width="25" alt="">
  </a>
</article>

<button id="clear-localstorage">Clear local storage (for testing)</button>

CSS

.alert-box {
  display: none;
  width: 50vw;
  position: relative;
  margin: 20px auto;
  border: 1px solid black;
}

.alert-box-close {
  position: absolute;
  top: -12px;
  right: -12px;
  cursor: pointer;
}

JavaScript

$(function() {
  // Check for localStorage
  if (typeof window.localStorage !== typeof undefined) {
    // Loop through all alert boxes
    $('.alert-box').each(function() {
      var $t = $(this),
        key = $t.attr('id');

      // If key exists and it has not expired
      if (window.localStorage.getItem(key)) {
        var json = JSON.parse(window.localStorage.getItem(key));
        if (json.hide && json.timestamp < Date.now() + 1000 * 60 * 60 * 24) {
          $t.hide();
        } else {
          $t.show();
        }
      } else {
      	$t.show();
      }
    });
  }

  // Bind click events to alert boxes
  $('.alert-box a.alert-box-close').click(function() {
    var $alertBox = $(this).closest('.alert-box');

    // Hide box
    $alertBox.hide(800);

    // Store option in localStorage, using the box's ID as key
    if (typeof window.localStorage !== typeof undefined) {
      window.localStorage.setItem($alertBox.attr('id'), JSON.stringify({
        hide: true,
        timestamp: Date.now()
      }));
    }
  });
  
  // For demo purposes only, clear localStorage to ease testing
  $('#clear-localstorage').click(function() {
  	window.localStorage.clear();
  });
});