code: function (node, callback) {
        GOVUK.details.addEvent(node, 'keypress', function (e, target) {
          // When the key gets pressed - check if it is enter or space
          if (GOVUK.details.charCode(e) === GOVUK.details.KEY_ENTER || GOVUK.details.charCode(e) === GOVUK.details.KEY_SPACE) {
            if (target.nodeName.toLowerCase() === 'summary') {
              // Prevent space from scrolling the page
              // and enter from submitting a form
              GOVUK.details.preventDefault(e)
              // Click to let the click event do all the necessary action
              if (target.click) {
                target.click()
              } else {
                // except Safari 5.1 and under don't support .click() here
                callback(e, target)
              }
            }
          }
        })
  
        // Prevent keyup to prevent clicking twice in Firefox when using space key
        GOVUK.details.addEvent(node, 'keyup', function (e, target) {
          if (GOVUK.details.charCode(e) === GOVUK.details.KEY_SPACE) {
            if (target.nodeName === 'SUMMARY') {
              GOVUK.details.preventDefault(e)
            }
          }
        })
  
        GOVUK.details.addEvent(node, 'click', function (e, target) {
          callback(e, target)
        })
      }
docs: Handle cross-modal click events