如何修复破坏布局的容器 div？

Question

完成侧边栏的工作后，我想转到右侧的内容页面，所以我添加了一个容器 div，我想将其设置为 flex 这样我就可以让两个框开始样式，但在添加它之后，页脚的位置被破坏了，侧边栏没有占用应有的空间 space。

这是一张照片：

.side-bar {
  font-family: 'Montserrat', sans-serif;
  font-size: large;
  font-weight: bold;
  display: flex;
  justify-content: left;
  background-color: rgb(235, 235, 235);
  width: 20%;
  height: 80%;
  flex-direction: column;
}

.side-bar ul {
  display: flex;
  flex-direction: column;
  margin-left: 0%;
  list-style: none;
  margin-top: 5%;
}

.side-bar ul li {
  margin-bottom: 10px;
  display: inline;
  cursor: pointer;
}

.togglable:hover {
  border-radius: 7px;
  background-color: rgb(216, 216, 216);
}

.togglable:active {
  background-color: rgb(221, 221, 221);
}

.side-bar ul a {
  color: black;
  text-decoration: none;
}

.side-bar h2 {
  font-family: 'Josefin Sans', sans-serif;
  margin-bottom: 20px;
}

.container {
  display: flex;
}

.task-container {
  background-color: red;
}

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>ToDoList</title>
  <link rel="stylesheet" href="style.css">
</head>

<body>
  <div class="nav-bar">
    <img src="logo.png" alt="logo">
    <nav>
      <ul>
        <li><a href="#">Services</a></li>
        <li><a href="#">Projects</a></li>
        <li><a href="#">About</a></li>
      </ul>
    </nav>
    <a class="cta" href="#"><button>Contact</button></a>
  </div>
  <div class="container">
    <div class="side-bar">
      <ul>
        <li class="togglable"><img src="gym.png" alt="gym" id="gym"><a href="#">Gym</a></li>
        <li class="togglable"><img src="today.png" alt="calendar" id="today"> <a href="#">Today</a></li>
        <li class="togglable"><img src="week.png" alt="calendar" id="week"><a href="#">This Week</a></li>
        <li class="togglable"><img src="month.png" alt="calendar" id="month"> <a href="#">This Month</a></li>
        <h2>Projects : </h2>
        <li id="addPr" class="togglable"><a href="#"><span id="plus-sgn">+</span> Add Project</a></li>
        <!-- <li class="togglable"><img src="checklist.png" alt="checlist" id="list"> <a href="#">Testing</a></li> -->
      </ul>
    </div>
    <div class="task-container">
      <p>Some Text To test the box</p>
    </div>
  </div>
  <div class="footer">
    <p id="copyright">Copyright © 2021 FaroukHamadi</p>
  </div>
  <script src="main.js"></script>
</body>

</html>

Answer 1

向任务容器添加宽度属性，并在 CSS 文件中添加页脚 class 属性。

.task-container {
    background-color: red;
    width: 100%;
    
}

.footer{
    position: absolute;
    bottom: 0px;
    width: auto;
}

如何修复破坏布局的容器 div？

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