JavaScript 系列二：第3課

by tp655998

HTML

<section id="to-do-list" class="">
  <div id="create-group" class="">
    <input id="new-item" class="btn" type="text" placeholder="請輸入待辦事項...">
    <button class="btn" onclick="add()">新增</button>
  </div>
  
  <div id="list-manager">
      <h3 id="title">代辦事項</h3>
      <button id="output" class="btn" onclick="output()">匯出</button>
  </div>

  <ul id="list" class="">
    <!-- <li class="note">1111 <span>x</span> </li> -->
  </ul>
  
</section>

CSS

body{
  background-color: #eee;
}
#to-do-list{
  width: 50%;
  margin: 0 auto;
  background-color: rgba(255, 255, 255, .35);
  border-radius: .5rem;
  padding: 1rem;
  border: 1px solid #666;
}



#create-group{
  margin-top: .5rem;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 0.5rem;
}


.btn{
  padding: .5rem;
  background-color: #fff;
  border: 1px solid #aaa;
  border-radius: .5rem;
}

.btn:hover{
  background-color: #333;
  color: #fff;
  cursor: pointer;
}

#list-manager{
  margin-top: 1rem;
  display: grid;
  grid-template-columns: 5fr 1fr;
  background-color: #D7B98E;
  border-radius: .5rem;
}

#output{
  border-radius: 0 .5rem .5rem 0;
  font-weight: 900;
}

#title{
  text-align: center;
  font-size: 1rem;
}

#list{
  list-style: none;
  padding: 0;
}
.note{
  padding: .5rem;
  background-color: #fff;
  border: 1px solid #aaa;
  border-radius: .5rem;
  margin-bottom: .5rem;
  padding: 1rem;
  position: relative;
  transition: .5s;
}
.note:hover{
  background-color: rgba(218, 201, 166, .5);
}
.note span{
  position: absolute;
  right: 5%;
}
.note span:hover{
  color: red;
  cursor: pointer;
}

JavaScript

function add()
{
	let new_item = document.getElementById('new-item');  
  
  if(new_item.value==''){
  	alert('請輸入代辦事項！');
  }
  else{
   	const list = document.getElementById('list');
  
    let item = document.createElement("li");
    item.classList.add("note");
    item.innerHTML = new_item.value + '<span>x</span>';
    item.onclick = deleteNote;

    list.append(item);
    new_item.value = '';
  }
}

function deleteNote(){
	let check = confirm('確定要刪除嗎？');
  if(check){
   	/* note > span */
		event.target.parentElement.remove(); 
  }

}

function output(){
  const list = document.getElementById('list');
  let bag_msg = '今日待辦： ';
  
  for (let i=0; i<list.children.length; i++) {
    let todo = list.children[i].textContent.split('x')[0];
    bag_msg += `${i+1}. ${todo} `;
  }
  
  alert(`今日待辦：${bag_msg}`);
}