JSFiddle - React, Tailwind, and code Playground

by evon0306

HTML

<script src="https://kit.fontawesome.com/41e2a8dba7.js" crossorigin="anonymous"></script>
   <body>
      <h1>To Do List</h1>
      
      <div id="inputfield">
         <select id="level" onchange="show1()">
            <option value="normal">一般</option>
            <option value="important">重要</option>
            <option value="urgent">警急</option>
         </select>
         <input type="text" id="input">
         <button onclick="add()">新增</button>
         <button id="output" onclick="output()">匯出</button>
      </div>

      <div id="todo">
         <ul id="todoul">
         </ul>
      </div>
   </body>

CSS

* {
  list-style: none;
  margin: 0;
}

body {
  background-color: rgb(255, 245, 233);
}
body h1 {
  border: 5px rgb(255, 134, 48) solid;
  background-color: rgba(230, 153, 65, 0.391);
  border-top: none;
  border-right: none;
  border-radius: 20px;
  padding: 1.5rem;
  margin: 1.5rem;
  width: 60%;
  min-width: 170px;
}
body div#inputfield {
  width: 60%;
  margin: 0 1.5rem;
  padding: 10px;
  display: flex;
}
body div#inputfield select {
  border: 0;
  width: 100px;
  font-size: 16px;
}
body div#inputfield input {
  height: 30px;
  width: 80%;
  min-width: 150px;
  border-radius: 5px;
  margin: 0 5px;
  font-size: 16px;
  border: 1px dashed rgb(255, 134, 48);
}
body div#inputfield button {
  width: 80px;
  min-width: 50px;
  font-size: 15px;
  margin-right: 0.25rem;
  border-radius: 10px;
  background-color: rgba(230, 153, 65, 0.391);
  border: 2px dashed rgb(255, 134, 48);
  transition: all 0.2s ease;
}
body div#inputfield button:hover {
  background-color: rgba(240, 183, 117, 0.753);
  border: 2px dashed rgb(255, 134, 48);
  cursor: pointer;
}
body div#todo ul {
  padding: 0 10px;
  margin: 0 1.5rem;
}
body div#todo ul li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 60%;
  min-width: 170px;
  margin: 8px 0;
  padding: 15px;
  font-size: 16px;
  border-bottom: 2px dashed rgb(255, 134, 48);
}
body div#todo ul li input {
  margin: 0 0.5rem;
  cursor: pointer;
}
body div#todo ul li i {
  cursor: pointer;
  font-size: 1.2rem;
  transition: all 0.3s ease;
}
body div#todo ul li i:hover {
  color: rgb(255, 134, 48);
  transform: scale(1.3);
}

li.important {
  color: orange;
}

li.urgent {
  color: red;
}

.importantText{
   color: orange;
   background-color: rgb(255, 237, 252);
}
.urgentText{
   color: red;
   background-color: rgb(138, 214, 255);
}

JavaScript

function add(){
   let todoText = document.getElementById('input').value; //取得input事項的值
   if(todoText=="")return;
   let ul = document.getElementById('todoul'); //選取
   let list = document.createElement('li');  //新增一個li
   
   let checkbox = document.createElement('input');  //新增一個input
   checkbox.type = "checkbox"; //input的種類是勾勾
   
   let span1 = document.createElement('span'); //新增等等要放事項的span

   let trush = document.createElement('i'); //新增垃圾桶圖片
   trush.className = "fa-solid fa-trash";
   trush.onclick = deleteli;

   span1.textContent = todoText;//剛剛取得的input事項放進去

   //加入正確的level class
   let level = document.getElementById('level');
   let levelIndex = level.selectedIndex;
   let levelText = level.options[levelIndex].text;
   if(levelText == level.options[0].text){
      list.className = list.className + "normal";
   }else if(levelText == level.options[1].text){
      list.className = list.className + "important";
   }else{
      list.className = list.className + "urgent";
   }
 
   //一一把element放到正確的位置
   ul.append(list);
   list.append(checkbox,span1,trush);

   document.getElementById('input').value = "";//把input清空
}

function deleteli(){
   event.target.parentElement.remove();
}

function output(){
   let todoul = document.getElementById('todoul').children;
   let num = 1;
   let list = '';
   for(let x of todoul){
 			if(x.className == "normal"){
      list = list + ' ( ' + num.toString() + ' ) ' + x.children[1].textContent;
      }else if(x.className == "important"){
      list = list + ' ( ' + num.toString() + ' ) ' + '*' + x.children[1].textContent + '*';
      }else{
      list = list + ' ( ' + num.toString() + ' ) ' + '**' + x.children[1].textContent+ '**';
      }
      num ++;
   }
   alert('今日待辦：' + list);
}

function show1(){
   let color = document.getElementById('level').value
   let input = document.getElementById('input'); //選取
   if(color == "normal"){
      input.className = "normalText"
   }else if(color == "important"){
     ...