填充或删除周围的其他div时如何保持Div居中而不移动？

Question

我尝试将 Plus 卡保持在网格中央，但无法正常工作。我也尝试过

position: absolute

，但卡片在它下面。

我需要添加或删除的

div

元素围绕永久居中的

div

。目标是使用 Javascript 添加新注释或删除注释，但使用 css 测试设计。

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  width: 100%;
  background-color: #ffffff;
  color: black;
  width: 100vw;
  height: 100vh;
  border: #008f4b solid 6px;
}

.nav_container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin: auto;
  margin-top: 20px;
  margin-bottom: 20px;
}

.nav {
  width: 300px;
  height: 40px;
  text-decoration: none;
}

ul {
  list-style-type: none;
  margin: auto;
  padding: 0px;
  overflow: hidden;
  background-color: #008f4b;
  border-radius: 20px;
  display: flex;
  align-items: center;
  padding-left: 10px;
  padding-right: 10px;
  border: #024731 solid 3px;
}

li {
  display: inline-block;
  color: white;
  text-align: center;
  padding: 10px 16px;
  text-decoration: none;
  cursor: pointer;
  height: 100%;
  width: 100%;
  margin-top: -5px;
  margin-bottom: -5px;
}

li:hover {
  color: white;
  background-color: #00b85f;
}

.search_container {
  margin-left: 10px;
}

.notes_container {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  width: 50vw;
  margin: auto;
}

.notes_wrapper {
  display: grid;
  margin: 0 auto;
  grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  grid-gap: 20px;
  height: 100%;
  grid-template-areas: "note note add_note note note", "note note note note note", ;
}

.note_card {
  grid-area: 'note';
  padding: 6px 6px 6px 6px;
  width: 200px;
  margin: 20px;
  height: 40px;
  background-color: #ebebeb;
  font-size: 24px;
}

.add_card {
  grid-area: 'add_note';
  padding: 40px 20px;
  width: 200px;
  margin: 20px;
  font-size: 100px;
  text-align: center;
  background-color: #ebebeb;
  cursor: pointer;
}

<div class="nav_container">
  <div class="nav">
    <ul>
      <li>All</li>
      <li>Recent</li>
      <li>Pinned</li>
      <li>Search</li>
      <!-- <li class="search_container"><image src="assets/Icons/search.svg"></image></li> -->
    </ul>
  </div>
</div>
<div class="notes_container">
  <div class="notes_wrapper">
    <div class="note_card">
      <h3>Notes</h3>
    </div>
    <div class="note_card">
      <h3>Notes</h3>
    </div>
    <div class="add_card">+</div>
    <div class="note_card">
      <h3>Notes</h3>
    </div>
    <div class="note_card">
      <h3>Notes</h3>
    </div>
    <div class="note_card">
      <h3>Notes</h3>
    </div>
    <div class="note_card">
      <h3>Notes</h3>
    </div>
  </div>
</div>

Answer 1

您可以使用网格容器，所有卡片自动放置在其中，并且加号按钮手动放置在中心。 这是一个例子：

const grid = document.querySelector('#grid');

function addCard() {
  const div = document.createElement('div');
  div.className='card';
  div.innerHTML = '×';
  div.addEventListener('click', removeCard);
  grid.appendChild(div);
}

function removeCard() {
  card = grid.querySelector('.card');
  card?.remove();
}

for(let i=0; i<20; i++) addCard();

#grid {
  display: grid;
  grid-template-rows: auto;
  grid-template-columns: 100px 100px 100px 100px 100px 100px;
  grid-gap: 6px;
  margin: auto;
  width: fit-content;
  user-select: none;
}

.card {
  height: 50px;
  background: #f8e122;
  border-radius: 6px;
  cursor: pointer;
  color: red;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 20px;
}

#plus {
  background: #1626ef;
  color: #ffffff;
  grid-column-start: 3;
  grid-column-end: 5;
  grid-row-start: 1;
  grid-row-end: 3;
  font-size: 68px;
  font-weight: bold;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: auto;
  display: flex;
  justify-content: center;
  align-items: center;
  line-height: 0;
  cursor: pointer;
}

<div id="grid">
<div id="plus" onCLick="addCard()">+</div>
</div>