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Sandbox attribute in html

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  • The sandbox attribute is used to enable some set of restriction for iframe contents.
    • Block form submission.
    • Content is treated as being from a unique origin.
    • Block script execution.
    • Disable APIs.
    • Prevent browsing context to run scripts.
    • Block plugins.
    • Block automatic triggered events.
  • Space separated list of values to remove the specific restriction.

Syntax for sandbox attribute in HTML:

<iframe sandbox="value1 value2 value3">

Applies To:

Element Attribute
<iframe> sandbox

sandbox Attribute Values:

Value Description
(no value) Applies all restrictions
allow-forms Re-enables form submission
allow-pointer-lock Re-enables APIs
allow-popups Re-enables popups
allow-same-origin Allows the iframe content to be treated as being from the same origin
allow-scripts Re-enables scripts
allow-top-navigation Allows the iframe content to navigate its top-level browsing context

Sample Coding for sandbox Attribute in HTML:

Tryit<!DOCTYPE html>
        <title>Wikitechy sandbox attribute</title>
        <iframe src ="wikitechy-script.html" sandbox>
            <p>Browser not Supported.</p>

Sample Coding for wikitechy-script.html:

<!DOCTYPE html>
       <button onclick="wikitechyAlert()">Click Me!</button>
          function wikitechyAlert()
            alert("This is Wikitechy Alert");

Code Explanation for sandbox Attribute in HTML:

sandbox Attribute Code Explanation

  1. <iframe> tag used to embed a inline frame, “wikitechy-script.html” will be embed to the current document.
  2. sandbox attribute is used to specify some restriction to the “wikitechy-script.html”.

Code Explanation for wikitechy-script.html:

wikitechyscript Code Explanation

  1. The script shows an alert message as “This is Wikitechy Alert”.

Output for sandbox Attribute in HTML:

sandbox Attribute Output

  1. When the user hit the Click me button that does not execute the script that was blocked by the “sandbox” attribute.
  2. sandbox Attribute Output
  3. If the sandbox attribute not presents the windows shows the alert message.

Browser Support for sandbox Attribute in HTML:

4.0 10.0 17.0 5.0 15.0

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