add callback to form submit?
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Is there a way to hook up a callback to a form submission or field submission? I’d like to do some processing when certain forms are submitted, depending on the values passed in.
In some cases, it’s enough just to check the field value on every page load and process if I need to. But sometimes we don’t want to react to the submitted value every time – just one time.
For example, I want to have a sub-item/page where the user downloads a file in a format that I will create. I don’t want the download to start every time that sub-page loads, just when they click the Export button.
Thanks.
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