javascript - 单击黑暗区域时如何关闭侧面菜单？-6ren

javascript - 单击黑暗区域时如何关闭侧面菜单？

转载作者：行者123 更新时间：2023-11-28 16:52:15

我构建了一个简单的侧面导航。如果运行该代码片段并将窗口调整为较小的尺寸，您将看到一个红色方 block 。如果单击它，则会打开菜单。

菜单打开得很好，但是我想在单击黑暗区域而不是 X 时关闭菜单。我尝试向主体本身添加一个“click”事件监听器并删除“is-open”类，但是没用。我花了几个小时思考可能是什么问题，最后决定在这里发帖并征求您的建议。

"use strict";

const menuToggle = document.querySelector(".menu-toggle");
const menuClose = document.querySelector(".menu-close");
const nav = menuToggle.parentElement;

menuToggle.addEventListener("click", event => {
  event.preventDefault();
  nav.classList.add("is-open");
  document.body.style.backgroundColor = "rgba(0,0,0,0.5)";
});

menuClose.addEventListener("click", event => {
  event.preventDefault();
  menuToggle.nextElementSibling.style.width = null;
  document.body.style.backgroundColor = null;
  nav.classList.remove("is-open");
});

:root {
  box-sizing: border-box;
}

*, *::before, *::after {
  box-sizing: inherit;
}

body {
  margin: 0;
  padding: 0;
}

.menu-toggle {
  width: 40px;
  height: 40px;
  border: 1px solid red;
  cursor: pointer;
}

.menu-container {
  position: absolute;
  background: lightskyblue;
  height: 100vh;
  width: 0;
  transition: width 0.4s ease-in-out;
  top: 0;
  left: 0;
  overflow: auto;
  z-index: 1;
}

.menu-close {
  position: absolute;
  right: 1em;
}

.nav-menu {
  list-style: none;
  padding-left: 0;
  margin: 50px 0 0 0;
}

.nav-menu > li + li {
  border-top: 1px solid #fff;
}

.nav-menu > li > a {
  display: block;
  color: #000;
  padding: 0.8em 1em;
  font-size: 1.1rem;
  text-decoration: none;
  text-transform: uppercase;
}


.nav.is-open .menu-container {
  width: 200px;
}

.menu-close::before {
  content: "\00d7";
  font-size: 2.6rem;
}

/*@media screen and (min-width: 37.5em) {*/
@media screen and (min-width: 40.5em) {
  body {
    background: #fff !important;
  }

  .menu-toggle {
    display: none;
  }

  .nav.is-open .menu-container {
    width: auto;
    height: auto;
  }

  .menu-container {
    position: initial;
    height: auto;
    width: auto;
    overflow: hidden;

  }

  .menu-close {
    display: none;
  }

  .nav-menu {
    display: flex;
    position: static;
    justify-content: center;
    margin: 0;
  }

  .nav-menu > li {
    margin-left: 1em;
  }

  .nav-menu > li + li {
    border-top: initial;
  }
}

<!DOCTYPE html>
<html lang="en-US">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link rel="stylesheet" href="hamburgerside.css">
  <title>Hamburger Menu Side</title>
</head>
<body>
<nav class="nav">
  <div class="menu-toggle">
    <span class="menu-toggle__linecenter"></span>
  </div>

  <div class="menu-container">
    <span class="menu-close"></span>
    <ul class="nav-menu">
      <li><a href="#">Home</a></li>
      <li><a href="#">Menu Item 1</a></li>
      <li><a href="#">Menu Item 2</a></li>
      <li><a href="#">Menu Item 3</a></li>
    </ul>
  </div>
</nav>

<main>
  <p>
    Lorem ipsum dolor sit amet, consectetur adipisicing elit.
    Accusamus accusantium aliquid consequatur facere illum
    incidunt magnam magni maiores nam neque numquam omnis
    perferendis porro quae quibusdam, quos sed tenetur ullam.
  </p>
</main>
<script src="hamburgerside.js"></script>
</body>
</html>

最佳答案

因此，如果我正确理解您要执行的操作，则您将需要使用 document 而不是 body 来进行点击事件。您还需要使用 event.stopImmediatePropagation() 而不是 event.preventDefault() ，后者将允许第一次点击，但不允许第二次点击。同样在这种情况下，您只需要在单击菜单以外的任何地方运行单击事件。

注意:我必须删除您的媒体查询，因为它阻止显示切换菜单。

"use strict";

const menuToggle = document.querySelector(".menu-toggle");
const menuClose = document.querySelector(".menu-close");
const nav = menuToggle.parentElement;

menuToggle.addEventListener("click", event => {
  event.stopImmediatePropagation();
  
  nav.classList.add("is-open");
  document.body.style.backgroundColor = "rgba(0,0,0,.5)";
});

document.addEventListener("click", event => {
  if (nav.classList.contains("is-open") && !event.target.classList.contains("nav-menu")) {
    menuToggle.nextElementSibling.style.width = null;
    document.body.style.backgroundColor = "#fff";
    nav.classList.remove("is-open");
  }
});

:root {
  box-sizing: border-box;
}

*, *::before, *::after {
  box-sizing: inherit;
}

body {
  margin: 0;
  padding: 0;
}

.menu-toggle {
  width: 40px;
  height: 40px;
  border: 1px solid red;
  cursor: pointer;
}

.menu-container {
  position: absolute;
  background: lightskyblue;
  height: 100vh;
  width: 0;
  transition: width 0.4s ease-in-out;
  top: 0;
  left: 0;
  overflow: auto;
  z-index: 1;
}

.menu-close {
  position: absolute;
  right: 1em;
}

.nav-menu {
  list-style: none;
  padding-left: 0;
  margin: 50px 0 0 0;
}

.nav-menu > li + li {
  border-top: 1px solid #fff;
}

.nav-menu > li > a {
  display: block;
  color: #000;
  padding: 0.8em 1em;
  font-size: 1.1rem;
  text-decoration: none;
  text-transform: uppercase;
}


.nav.is-open .menu-container {
  width: 200px;
}

.menu-close::before {
  content: "\00d7";
  font-size: 2.6rem;
}

}

<nav class="nav">
  <div class="menu-toggle">
    <span class="menu-toggle__linecenter"></span>
  </div>

  <div class="menu-container">
    <span class="menu-close"></span>
    <ul class="nav-menu">
      <li><a href="#">Home</a></li>
      <li><a href="#">Menu Item 1</a></li>
      <li><a href="#">Menu Item 2</a></li>
      <li><a href="#">Menu Item 3</a></li>
    </ul>
  </div>
</nav>

<main>
  <p>
    Lorem ipsum dolor sit amet, consectetur adipisicing elit.
    Accusamus accusantium aliquid consequatur facere illum
    incidunt magnam magni maiores nam neque numquam omnis
    perferendis porro quae quibusdam, quos sed tenetur ullam.
  </p>
</main>