JSFiddle - React, Tailwind, and code Playground

by birdie2019

HTML

<div class="container">
    <h1>待辦事項</h1>
    <div id="input-panel">
      <input type="text" id="input" placeholder="請輸入待辦事項...">
      <select id="event-cat" onchange="changeColor()">
        <option value="none" selected disabled hidden>事項分類</option>
        <option value="normal">一般</option>
        <option value="important">重要</option>
        <option value="urgent">緊急</option>
      </select>
      <button class="add-btn" onclick="add()" >+</button>
    </div>
    
  </div>
  <div class="container">
    <ul id="list">
    </ul>
    <button id="export-btn">匯出</button>
    <button id="save-btn">儲存</button>
  </div>

CSS

* {
  box-sizing: border-box;
  font-size: 10px;
  color: #606060;
}

body {
  background-color: #FFF0DF;
}

.container {
  width: 500px;
  margin: 30px auto;
}

/* input-panel */
h1 {
  text-align: center;
  font-size: 2.4rem;
  letter-spacing: 3px;
}

#input-panel {
  display: flex;
  justify-content: center;
  margin: 10px 0;
}

#input-panel > input {
  flex: 1;
  padding: 10px 8px;
  border-radius: 5px 0 0 5px;
  border: 0;
  outline: 0;
  font-size: 1.5rem;
  letter-spacing: 1px;
}

.text-normal {
  color: #6B8F71;
}

.text-important {
  color: #F49344;
}

.text-urgent {
  color: #BF1802;
}

#event-cat {
  border: 0;
  border-left: 3px solid #fffaf5;
  width: 100px;
  font-size: 1.5rem;
  letter-spacing: 1px;
  outline: 0;
  text-align: center;
}

.add-btn {
  border: 0;
  width: 40px;
  border-radius: 0 5px 5px 0;
  font-size: 1.8rem;
  font-weight: 700;
  cursor: pointer;
  background-color: #546A76;
  color: #fff;
}

/* list */
#list > li {
  display: flex;
  justify-content: flex-end;
  background-color: rgba(255, 255, 255, 0.8);
  padding: 10px 8px;
  margin-bottom: 8px;
  border-radius: 5px;
}

#list > li :first-child {
  flex: 1;
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 1px;
}

#list > li :nth-child(2) {
  width: 100px;
  font-size: 1.3rem;
  text-decoration: underline;
  vertical-align: center;
  letter-spacing: 1px;
  color: #a6a6a6;
}

#list > li :last-child {
  background-color: transparent;
  color: #a6a6a6;
  border: 0;
  cursor: pointer;
  font-weight: 700;
  transition: all 0.3s;
}

#list > li :last-child:hover {
  color: #FA829C;
  transform: scale(1.1);
}

#list > li :nth-last-child(2) {
  background-color: transparent;
  color: #a6a6a6;
  border: 0;
  cursor: pointer;
  font-weight: 700;
  transition: all 0.3s;
}

#list > li :nth-last-child(2):hover {
  color: #00bbbb;
  transform: scale(1.1);
}

/* export-btn */
#export-btn, #save-btn {
  background-color: #8E6F64;
  border: 0;
  color: #fff;
  padding: 8px;
  font-size:...

JavaScript

function add() {
  var input = document.querySelector('#input');
  var list = document.querySelector('#list');
  var li = document.createElement('li');
  var span = document.createElement('span');
  var finishSpan = document.createElement('span');
  var deleteBtn = document.createElement('button');
  var finishBtn = document.createElement('button');
  var eventCat = document.querySelector('#event-cat');
  var eventCatIndex = eventCat.selectedIndex;
  var eventValue = eventCat.options[eventCatIndex].value;
  var inputValue = input.value;
  if (eventValue != 'none' && inputValue != '') {
      list.append(li);
      li.append(span);
      span.className = eventValue;
      li.append(finishSpan);
      finishSpan.style.display = 'none';
      finishSpan.className = 'show-finish';
      finishSpan.textContent = '(已完成)';
      li.append(finishBtn);
      finishBtn.textContent = '[ 標示為已完成 ]';
      finishBtn.onclick = finishState;
      li.append(deleteBtn);
      deleteBtn.textContent = '[ 刪除 ]';
      deleteBtn.onclick = deleteLi;
      span.textContent = inputValue;
      input.value = '';
      eventCat.value = 'none';
      input.className = '';
  } else {
      alert('請填寫待辦事項和事件分類');
  }
}
  
function finishState () {
  var e = event.target;
  var showFinish = e.closest('li').querySelector('.show-finish');
  if (e.textContent == '[ 標示為未完成 ]') {
      e.textContent = '[ 標示為已完成 ]';
      showFinish.style.display = 'none';
  } else {
      e.textContent = '[ 標示為未完成 ]';
      showFinish.style.display = 'block';
  }
}

function deleteLi() {
  var yes = confirm('確定要刪除嗎？');
  if (yes) {
    event.target.closest('li').remove();
  }
}
  
var exportBtn = document.querySelector('#export-btn');
exportBtn.onclick = exportList;
  
function exportList() {
  var list = document.querySelectorAll('#list li');
  var text = ''; 
  var num = 1;
  for (var item of list) {
  var getClassName = item.querySelector('span').className;
  var spanTextContent =...