Uncaught ReferenceError: copiedElement is not defined

const copyElement = (elementId, elementObj) => {
  if (elementObj) {
    const copiedElement = elementObj
  } else {
    const copiedElement = selectedElements.filter(element => element.id === elementId)
  }

  let element;

  element = {
    ...copiedElement[0],
    id: generateElementId()
  }

  if (selectedElements === winds || selectedElements === areas) {
    element.params = copiedElement[0].params
  }

  if (selectedElements === groups) {
    copiedElement.elements.forEach((el) => {
      elements.elements.push(copyElement(el.id, el))
    })

  }

  if (elementObj) {
    if (elementObj.params) {
      if ('forse' in el.params) {
        winds.push(element)
      } else if ('coup' in el.params) {
        areas.push(element)
      }
    } else {
      winds.push(element)
    }
    return element
  } else {
    selectedElements.push(element)
    renderAll()
  }
}

<button class="game-panel-item__copy" onClick="copyElement(${group.id})">
  Copy
</button>