The spec for this action:
https://www.adobe.com/content/dam/acom/en/devnet/pdf/pdfs/PDF32000_2008.pdf#G11.2111850
An example of a form using this action:
https://www2.illinois.gov/rev/forms/reg/Documents/reg-1-mr.pdf
element.name = this.data.fieldName;
      element.tabIndex = DEFAULT_TAB_INDEX;
      elementData.userValue = textContent;
      element.setAttribute("id", id);
      element.addEventListener("input", event => {
        storage.setValue(id, { value: event.target.value });
        this.setPropertyOnSiblings(
          element,
          "value",
          event.target.value,
          "value"
        );
      });
      let blurListener = event => {
        if (elementData.formattedValue) {
          event.target.value = elementData.formattedValue;
        }
        
        event.target.scrollLeft = 0;
        elementData.beforeInputSelectionRange = null;
      };
      if (this.enableScripting && this.hasJSActions) {
        element.addEventListener("focus", event => {
          if (elementData.userValue) {
            event.target.value = elementData.userValue;
          }
        });
        element.addEventListener("updatefromsandbox", jsEvent => {
          const actions = {
            value(event) {