我正在嘗試使用單詞作為標簽創建輸入，然后允許用戶刪除它們。每次單擊 X 時，我都會收到一條錯誤消息ReferenceError：刪除未定義我不確定我做錯了什么。我正在使用以下代碼：HTML：<div class="ingredients">  <ul id="list"></ul>  <input type="text" id="ingredients" placeholder="type and Enter ..."></div>Javascriptvar txt = document.getElementById('ingredients');var list = document.getElementById('list');var items = ['PHP', 'React.js', 'WordPress'];txt.addEventListener('keypress', function(e) {  if (e.key === 'Enter') {    let val = txt.value;    if (val !== '') {      if (items.indexOf(val) >= 0) {        alert('Tag name is a duplicate');      } else {        items.push(val);        render();        txt.value = '';        txt.focus();      }    } else {      alert('Please type a tag Name');    }  }});function render() {  list.innerHTML = '';  items.map((item, index) => {    list.innerHTML += `<li><span>${item}</span><a href="javascript: remove(${index})">X</a></li>`;  });}function remove(i) {  items = items.filter(item => items.indexOf(item) != i);  render();}window.onload = function() {  render();  txt.focus();}