我有几个下拉选择，我试图实现一个退出功能，点击任何地方的文件，使下拉列表将关闭。目前，它只关闭，如果你点击自己或另一个选择。

const selection = document.querySelectorAll('.selection-selected');
const optionContainer = document.querySelectorAll('.options-container');

function toggleSelection() {
    const selectionToggle = this.getAttribute("aria-expanded");
    for (i = 0; i < selection.length; i++) {
      selection[i].setAttribute("aria-expanded", "false");
    }
    
    if (selectionToggle == "false") {
        this.setAttribute("aria-expanded", "true");

    } 
}
selection.forEach(serviceItem => serviceItem.addEventListener("click", toggleSelection));

   
//Channel Selection
const channelSelection = document.querySelector('.channel');
const optionList = document.querySelectorAll('.channel-option');

optionList.forEach( o => {
  o.addEventListener("click", () => {
    channelSelection.innerHTML = o.querySelector("label").innerHTML;
    channelSelection.setAttribute("aria-expanded", "false");
    channelSelection.style.color = "#000";
    
  })
})

for (i = 0; i < selection.length; i++) {
  if(selection[i].ariaExpanded == "true") {
    document.addEventListener('click', () => {
      selection[i].setAttribute("aria-expanded", "false");
    })
  }
}

我试过这个，但它不工作，所以我正在寻找人谁可以建议我解决这个问题。谢谢你的帮助提前。