Web Storage saves data in browser.
    
    ## Example
    ```html
    <script>
    localStorage.setItem("theme", "dark");
    alert(localStorage.getItem("theme"));
    </script>
    ```
    
    ## Use cases
    - remember theme
    - save cart items
    - keep login state
    
    ## Difference
    - localStorage → permanent
    - sessionStorage → tab only

Store data in browser using localStorage and sessionStorage.

HTML Web Storage

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HTML Web Storage

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