Title: Usinging external value via iframe
Last modified: December 10, 2020

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# Usinging external value via iframe

 *  Resolved [zukenstein](https://wordpress.org/support/users/zukenstein/)
 * (@zukenstein)
 * [5 years, 6 months ago](https://wordpress.org/support/topic/usinging-external-value-via-iframe/)
 * Hi again 🙂
 * Is it possible to:
    Load in an html field, an iframe with a link to an external
   webpage within it that only has a figure like 9988 on the page, then use the 
   figure that shows in the html field in a calculation field?
 * i.e. html field fieldname123 loads external page via iframe and just shows 9988.
   
   Calculation field fieldname456 uses fieldname123 value within its formula.
 * Hope I explained that ok
 * Thanks
    -  This topic was modified 5 years, 6 months ago by [zukenstein](https://wordpress.org/support/users/zukenstein/).

Viewing 5 replies - 1 through 5 (of 5 total)

 *  Plugin Author [codepeople](https://wordpress.org/support/users/codepeople/)
 * (@codepeople)
 * [5 years, 6 months ago](https://wordpress.org/support/topic/usinging-external-value-via-iframe/#post-13773251)
 * Hello [@zukenstein](https://wordpress.org/support/users/zukenstein/)
 * I guess you should read the following post to understand the way a parent page
   can communicate with a child page loaded by an <iframe>. This process includes
   security restrictions, and limitations:
 * [https://javascript.info/cross-window-communication](https://javascript.info/cross-window-communication)
 * Best regards.
 *  Thread Starter [zukenstein](https://wordpress.org/support/users/zukenstein/)
 * (@zukenstein)
 * [5 years, 6 months ago](https://wordpress.org/support/topic/usinging-external-value-via-iframe/#post-13773997)
 * ok thanks I’ll check that out
 *  Thread Starter [zukenstein](https://wordpress.org/support/users/zukenstein/)
 * (@zukenstein)
 * [5 years, 6 months ago](https://wordpress.org/support/topic/usinging-external-value-via-iframe/#post-13775690)
 * I can get the “number” to show in the html field ok using the iframe, I just 
   need to know how to use it within the calculation field now.
 * Is there something I need to do to get the calculation field to recognise the
   html field figure as a number only?
 * Thanks
 *  Plugin Author [codepeople](https://wordpress.org/support/users/codepeople/)
 * (@codepeople)
 * [5 years, 6 months ago](https://wordpress.org/support/topic/usinging-external-value-via-iframe/#post-13776136)
 * Hello [@zukenstein](https://wordpress.org/support/users/zukenstein/)
 * You cannot directly access the information loaded by an iframe. You must understand
   the iframe tag is like a browser embedded into another browser, each of them 
   running in its own context. The number you are referring to is not in the “HTML
   Content” field. This number belongs to the page loaded by the iframe. It is a
   different context. Our plugin does not include an operation to read the information
   loaded by another page into an iframe. So, you must implement this behavior by
   yourself using javascript code. Please, read the post I recommended you previously:
 * [https://javascript.info/cross-window-communication](https://javascript.info/cross-window-communication)
 * Best regards.
 *  Thread Starter [zukenstein](https://wordpress.org/support/users/zukenstein/)
 * (@zukenstein)
 * [5 years, 6 months ago](https://wordpress.org/support/topic/usinging-external-value-via-iframe/#post-13776357)
 * Ok Thanks I’ll go into it in a bit more depth

Viewing 5 replies - 1 through 5 (of 5 total)

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 * 5 replies
 * 2 participants
 * Last reply from: [zukenstein](https://wordpress.org/support/users/zukenstein/)
 * Last activity: [5 years, 6 months ago](https://wordpress.org/support/topic/usinging-external-value-via-iframe/#post-13776357)
 * Status: resolved