HTML DOM localStorage Properties

The HTML DOM localStorage Properties enables user to store key-value pairs in local browser itself for future reference. Key-value pairs are not lost until explicitly removed/cleared.

Syntax

Following is the syntax −

Window.localStorage

Here, localStorage can have following properties/methods −

  • setItem(‘key’,’value’)
  • getItem(‘key’)
  • removeItem(‘key’)

Let us see an example of localStorage properties −

Example

 Live Demo

<!DOCTYPE html>
<html>
<head>
<title>LocalStorage clear()</title>
<style>
   form {
      width:70%;
      margin: 0 auto;
      text-align: center;
   }
   * {
      padding: 2px;
      margin:5px;
   }
   input[type="button"] {
      border-radius: 10px;
   }
   table,th,td {
      border:1px solid black;
      border-collapse: collapse;
      margin: 0 auto;
   }
</style>
</head>
<body>
   <form>
      <fieldset>
         <legend>LocalStorage clear( )</legend>
         <table>
            <tr>
               <th>Key</th>
               <th>Value</th>
            </tr>
            <tr>
               <td>PassKey</td>
               <td>ja12ertplo</td>
            </tr>
         </table>
         <input type="button" value="Store Key" onclick="storeData()">
         <input type="button" value="Delete Key" onclick="clearData()">
         <div id="divDisplay"></div>
      </fieldset>
   </form>
   <script>
      var divDisplay = document.getElementById("divDisplay");
      var extStyle = document.getElementById("extStyle");
      function clearData(){
         localStorage.clear();
         divDisplay.textContent = 'Succesfully Deleted';
      }
      function storeData(){
         localStorage.setItem('PassKey','ja12ertplo');
         divDisplay.textContent = 'Succesfully Stored';
      }
   </script>
</body>
</html>

Output

After clicking ‘Store Key’ button −

After clicking ‘Delete Key’ button −

Updated on: 15-Feb-2021

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